Answer:
-18
Step-by-step explanation:
Substitute in -2 for x
-(-2)²+2(-2)-10
-4-4-10
-18
HELP PLS I'LL GIVE BRAINLIEST!!!!!
Answer:
wht is you need help on? you just gave us a paper not saying anything else
Step-by-step explanation:
write the following expression in exponential form 8*8*8*8*3*3
Answer:
\(8*8*8*8*3*3= 8^4 * 3^2\)
Step-by-step explanation:
The exponents are used to write mathematical expressions in compact and simple form which is called scientific notation.
Given expression is:
\(8*8*8*8*3*3\)
When two or more same numbers are multiplied they can be written using exponents. i.e. a*a*a = a^3
We can see that 8 is repeated four times in the expression so,
\(8*8*8*8 = 8^4\)
Similarly, 3 is repeated two times
\(3*3 = 3^2\)
Combining both we get
\(= 8^4 * 3^2\)
Hence,
\(8*8*8*8*3*3= 8^4 * 3^2\)
whats the whole number of 222+2022+2202+2220
Answer:
6666
Step-by-step explanation:
222+2022+2202+2220=6666
An English teacher reviewed 2 3 of an essay in 1 4 of an hour. At this rate, how many essays can she review in 1 hour? Simplify your answer and write it as a proper fraction, mixed number, or whole number. essays
The essays that she can review in 1 hour would be; 2 2/3.
What is a fraction?A fraction represents a part of a number or any number of equal parts.
We are given that English teacher reviewed 2 /3 of an essay in 1/ 4 of an hour.
Thus, Fraction of the essay reviewed = 2/3
Amount of time used = 1/4
Therefore, the fraction of essay for an hour can be calculated as;
= Fraction of the essay reviewed / Amount of time used
= 2/3 ÷ 1/4
= 2/3 × 4
= 8/3
= 2 2/3
Hence, She will review 2 2/3 essay.
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Solve the following quadratic inequality x^2+x-6>0
Answer:
x < -3 or x > 2
Step-by-step explanation:
x² + x - 6 > 0
Convert the inequality to an equation.
x² + x - 6 = 0
Factor using the AC method and get:
(x - 2) (x + 3) = 0
If any individual factor on the left side of the equation is equal to 0, the entire expression will be equal to 0.
x - 2 = 0
x = 2
x + 3 = 0
x = -3
So, the solution is x < -3 or x > 2
Pls help with the question in the picture. 20 Points and brainliest.
Answer:
**NEED USEFUL ANSWER ASAP, H.W QUESTION**
Given that hotter blackbodies produce more energy than cooler blackbodies, why do cooler red giants have much higher luminosities than much hotter white dwarfs?
Step-by-step explanation:
-2x + 7y = 20
x + 7y = 32
Answer:
(4,4)
Step-by-step explanation:
1) Using substitution: move 7y to the other side by subtraction
x = 32 - 7y
2) substitute in for x in the first equation
-2(32 - 7y) + 7y = 20
3) distribute
-64 + 14y + 7y = 20
4) add like terms and solve for y
21y = 84
y = 4
5) plug in y value of for in one of the eqautions to get x value
-2x + 7(4) = 20
x = 4
Y=x^3-4x^2-20x+48 use the rational zero theorem
The roots of the given polynomial using the rational zero theorem are; 2, -4 and 6.
How to use the rational zero theorem?We are given the polynomial;
y = x³ - 4x² - 20x + 48
Since all coefficients are integers, we can apply the rational zeros theorem.
The trailing coefficient (the coefficient of the constant term) is 48
Find its factors (with the plus sign and the minus sign): ±1, ±2, ±3, ±4, ±6, ±8, ±12, ±16, ±24, ±48.
These are the possible values for p.
The leading coefficient (the coefficient of the term with the highest degree) is 1.
These are the possible rational roots:
±1, ±2, ±3, ±4, ±6, ±8, ±12, ±16, ±24, ±48.
Checking the possible roots: if a is a root of the polynomial P(x), the remainder from the division of P(x) by x - a should equal 0 (according to the remainder theorem, this means that P(a)=0
Plugging in those values, the only ones that yield P(a) = 0 are; 2, -4 and 6.
Thus, these are the roots of the given polynomial.
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Corn: In a prior sample of corn, farmer Carl finds that 14% of the sample has worms but the margin of error for his population estimate was too large. He wants to set the margin of error to be 1.5% at the 95% confidence level. Enter your answers as whole numbers. What is the minimum sample size required for this type of accuracy? What is the minimum sample size needed if we have no prior knowledge of the sample proportion
The minimum sample size required to obtain this type of accuracy is 740
What is the margin of error for large samples?Suppose that we have:
Sample size n > 30
Sample standard deviation = s
Population standard deviation = \(\sigma\)
Level of significance = \(\alpha\)
Then the margin of error(MOE) is obtained as
Case 1: Population standard deviation is known
Margin of Error = MOE = \(Z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}\)
Case 2: Population standard deviation is unknown
MOE = \(Z_{\alpha/2}\dfrac{s}{\sqrt{n}}\)
where Z is the critical value of the test statistic at the level of significance
As per the given, we have
The prior estimate of population proportion:
Margin or error : 1.5% = 0.015
Critical value for 95% confidence = 1.96
Formula to find the sample size:-
\(Z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}\)
= \(n = p(1-p) \dfrac{Z_{\alpha/2}}{E}^2\\\\n = 0.14(1-0.14) \dfrac{1.96}{0.015}^2\\\\n = 740\)
Hence, the minimum sample size required to obtain this type of accuracy is 740.
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Kenneth is creating a chart to compare and contrast the different transformations of objects. He wants to show similarities and differences between translations, rotations, and reflections. In his chart, four statements are given. Which statements are true for a translation? Group of answer choices The distances between points on the polygon are preserved by the transformation. The orientation of points on the polygon is preserved by the transformation. The distance between corresponding points in the image and pre-image is constant. The angle measures between sides on the polygon are preserved by the transformation.
The statements that are true for a translation are:
The distances between points on the polygon are preserved by the transformation.
The distance between corresponding points in the image and pre-image is constant.
These statements are true for a translation because when an object is translated, it is shifted a certain distance in a certain direction. This means that the distances between points on the polygon remain the same and the distance between the corresponding points in the image and pre-image is constant.
Translation is the process of converting written, spoken, or visual information from one language into another. It is a complex process involving both linguistic knowledge and cultural understanding. Professional translators use a range of techniques to accurately convey the meaning of a text, including knowledge of grammar, syntax, and idiomatic expressions. Translators also take into account the cultural context of the text, ensuring that the translation reflects the same cultural references and nuances as the original. Translation can also refer to the conversion of DNA sequences from one form to another, such as from RNA to protein.
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If my teacher is giving 6 prizes and I am the first one to get the prize. She says it’s in an envelope ✉️ what is it I will give brainlest for the best answer
Tim saw that a pair of $200 dollar jeans had been marked down by 20%. He told his friend that if you took the new price of the jeans and increased that value by 20%, the jeans would return to the original price of $200. is he correct or no?
Hey there!
The answer is no, they would not return to the original price of $200.
This is because when you decrease 200 by 20%, you get 160. Then, if you increase 160 by 20%, you get 192. This is because 20% of 200 and 20% of 160 is different.
Hope this helps! Have a great day, and good luck on your assignment!
Consider the function f(x) = (x − 5)2 + 2. On a coordinate plane, a parabola opens up. It goes through (3, 5), has a vertex at (5, 2), and goes through (7, 5). Which of the following domains allows f(x) to have an inverse that is a function? x ≥ 0 x ≥ 1 x ≥ 2 x ≥ 5
Answer:
x ≥ 5, on edge
Step-by-step explanation:
Answer: D
Step-by-step explanation: edge 2023
Hugh wrote six checks from his account in the following amounts: $20, $20, $12,$20, $12, and $42. He also made a deposit of $57 and was charged a $15 service fee by the bank. What is the change in Hugh's account balance? *
Answer:
-$84
Step-by-step explanation:
To find out how much Hugh spent from using checks, you would first add up his amounts. This looks like $20 + $20 + $12 + $20 + $12 + $42, which equals $126. However, since this is money that Hugh spent, it is a negative value to his bank account, making the number -$126.
Next, Hugh deposited $57 into his account. This is a positive value, and it should be added to the -$126. This looks like: -$126 + $57 = -$69.
Finally, Hugh was charged $15 by his bank. This is a negative value, so it will be subtracted from the current -$69 change. This looks like: -$69 - $15 = -$84. -$84 is the final answer, and represents the total change in Hugh's bank account. Hope this helps!
13. Austria has a population of 8.747 million people in 2016. The country holds the record for the highestpercentage of individuals in a country that are smokers. If 3.175 million people of the country smoke, whatpercentage of the total population is this rounded to the nearest tenth?14. The strongest beer ever sold named “The End of History" contains 55% alcohol content (sold in July 2010). Whatamount of alcohol is in each bottle of 16 oz beer?
The total population of people in the country is
\(\begin{gathered} =8.747\text{million people} \\ =8.747\times1000000 \\ =8,747,000\text{ people} \end{gathered}\)The number of people that smokes is
\(\begin{gathered} =3.175\text{million people} \\ =3.175\times1000000 \\ =3,175,000\text{ people} \end{gathered}\)The formula for the percentage of people that smoke is
\(\text{ percentage smokers}=\frac{\text{ population of smokers}}{\text{total population}}\times100\text{ \%}\)By substituting the values, we will have
\(\begin{gathered} \text{ percentage smokers}=\frac{\text{ population of smokers}}{\text{total population}}\times100\text{ \%} \\ \text{percentage smokers=}\frac{3,175,000}{8,747,000}\times\frac{100}{1} \\ \text{percentage smokers}=\frac{3,175,000}{87,470}\text{ \%} \\ \text{percentage smokers}=36.298\text{ \%} \\ \text{percentage smokers}\approx\text{ nearest tenth 36.3\%} \end{gathered}\)Hence,
The final answer = 36.3%
Divide.
(−2030)÷1820
What is the quotient?
Answer:
-1.11538461538
Step-by-step explanation:
Answer:
The Answer would be -2027
Step-by-step explanation:
I did the test and it was right enjoy.
3/4x=5/8 what does x= i couldnt find the answer
\(\frac{5}{8}\frac{3}{4}\)=x
x=\(\frac{5}{8} *\frac{4}{3}\)
x=\(\frac{5}{6}\)
PLS HELP ASAP
What is (f-g)(3})?
Answer:
442
Step-by-step explanation:
you can download g a u t h m a t h for questions like this, good luck :D
Given. R=0 3 -4 5 and S=-2 -8 0 2. what is X if X+R=S?
Answer:
\(X =\left[\begin{array}{cc}-2 &-11\\4 &-3\end{array}\right]\)
Step-by-step explanation:
Given
\(R =\left[\begin{array}{cc}0&3\\-4&5\end{array}\right]\)
\(S =\left[\begin{array}{cc}-2&-8\\0&2\end{array}\right]\)
\(X + R = S\)
Required
Find X
\(X + R = S\)
Make X the subject
\(X = S - R\)
Substitute values for S and R
\(X =\left[\begin{array}{cc}-2&-8\\0&2\end{array}\right] - \left[\begin{array}{cc}0&3\\-4&5\end{array}\right]\)
This can be rewritten as:
\(X =\left[\begin{array}{cc}-2 -0 &-8 - 3\\0 - (-4) &2 - 5\end{array}\right]\)
\(X =\left[\begin{array}{cc}-2 &-11\\4 &-3\end{array}\right]\)
On her breakfast tray, Aunt Lily had a little vase of flowers - a mixture of primroses and celandines. She counted up the petals and found there were 39. "Oh, how lovely!" she said, "exactly my age; and the total number of flowers is exactly your age, Rose!" How old is Rose?
(NB: Primroses have five petals on each flower and Celandines have eight petals on each flower). Please show working
Rose's age should be a whole number, we can round 7.8 to the nearest whole number, which is 8.
Let's assume the number of primroses in the vase is p, and the number of celandines is c.
Each primrose has 5 petals, so the total number of primrose petals is 5p.
Each celandine has 8 petals, so the total number of celandine petals is 8c.
According to the given information, the total number of petals is 39. Therefore, we can set up the equation:
5p + 8c = 39 (Equation 1)
Aunt Lily mentions that the total number of flowers is exactly Rose's age. Since Rose's age is not provided, we'll represent it with the variable r.
The total number of flowers is p + c, which is also equal to Rose's age (r). Therefore, we have another equation:
p + c = r (Equation 2)
We need to find the value of r (Rose's age). To do that, we'll solve the system of equations by eliminating one variable.
Multiplying Equation 2 by 5, we get:
5p + 5c = 5r (Equation 3)
Now we can subtract Equation 1 from Equation 3 to eliminate the p term:
(5p + 5c) - (5p + 8c) = 5r - 39
This simplifies to:
-3c = 5r - 39
Now, let's rearrange Equation 2 to solve for p:
p = r - c (Equation 4)
Substituting Equation 4 into the simplified form of Equation 3, we have:
-3c = 5r - 39
Substituting r - c for p, we get:
-3c = 5(r - c) - 39
Expanding, we have:
-3c = 5r - 5c - 39
Rearranging the terms, we get:
2c = 5r - 39
Now we have a system of two equations:
-3c = 5r - 39 (Equation 5)
2c = 5r - 39 (Equation 6)
To solve this system, we can eliminate one variable by multiplying Equation 5 by 2 and Equation 6 by 3:
-6c = 10r - 78 (Equation 7)
6c = 15r - 117 (Equation 8)
Now, let's add Equation 7 and Equation 8 to eliminate c:
-6c + 6c = 10r + 15r - 78 - 117
This simplifies to:
25r = 195
Dividing both sides by 25, we get:
r = 7.8
Since Rose's age should be a whole number, we can round 7.8 to the nearest whole number, which is 8.
Therefore, Rose is 8 years old.
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solve for x.
if possible could you describe how you got to the answer too- i'm really not getting this
Step-by-step explanation:
By Side-Splitter Theorem,
20 / 30 = 36 / (x + 5 + 30).
Therefore (x + 5 + 30) = 54, x = 19.
Answer:
x=59
Step-by-step explanation:
hope this helped
Find the value of each expression.
2 + 3 • 4
(2 + 3)(4)
2﹣3 • 4
2﹣(3 + 4)
2﹣3﹣4
Answer:
1) 2+3*4= 14
2) (2+3)(4)= 20
3) -10
4) -5
5) -5
Step-by-step explanation:
STEP By Step Explaination needed
NO sp.am
No Go.ogle
Solve it
\(\frac{5}{11} + \frac{3}{11} \)
Answer:
8/11
Step-by-step explanation:
5+3=8
Answer:
\(\sf\huge\longmapsto \: \frac{8}{11} \)
Step-by-step explanation:
\(\sf\huge\longmapsto \: \: \frac{5}{11} + \frac{3}{11} \)
\(\sf\huge\longmapsto \: \frac{5 + 3}{11} \)
\(\sf\huge\longmapsto \: \frac{8}{11} \)
Simplify the lefthandside so that LHS = RHS:
The simplification is shown below. And the proofs are done step-wise.
What is simplification?The left-hand side and right-hand side of an equation can be separated into two separate sections. We abbreviate the equation's LHS and RHS. If both the LHS and the RHS have identical values, then we may state that the equation is true; otherwise, the equation does not hold for at least some real number values.
According to the R.H.S rule, two right triangles are said to be congruent if one right triangle's hypotenuse and one of its sides are equal to the hypotenuse and one of its sides of a second right triangle.
L.H.S
= \(\frac{cos(t)}{1 + sin(t)} - \frac{cos(t)}{1 - sin(t)}\)
= \(cos (t) [\frac{1}{1 + sin(t)} - \frac{1}{1 - sin(t)}]\)
= \(cos (t) [\frac{1 - sin(t)-1 - sin (t)}{1^2 - sin^2(t)}]\)
= \(cos (t) [\frac{- 2sin (t)}{cos^2(t)}]\)
= \([\frac{- 2sin (t)}{cos(t)}]\)
= \(- 2 tan (t)\) = R.H.S
Thus, L.H.S = R.H.S
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what is the area of the shaded area. Round to the nearest whole unit.
please help!!!
Answer:
69.53 or 70(depending on rounding)
Step-by-step explanation:
The squares area is (9*2)^2 which is 324.
The circles area is 9^2 pi or 254.47 approx.
Subtract and you get 69.53 or 70
Decide which of the two given prices is the better deal and explain why. You can fill a 12-gallon tank of gas for $39.43 or buy gas for $3.20/gallon.
Answer:
$3.20/gallon
Step-by-step explanation:
to fill up your tank at $3.20/gallon only costs $38.40
Let mu denote the true average number of minutes of a television commercial. Suppose the hypothesis H0: mu = 2.1 versus Ha: mu > 2.1 are tested. Assuming the commercial time is normally distributed, give the appropriate rejection region when there is a random sample of size 20 from the population and we would like to test at the level of significance 0.01. Let T be the appropriate test statistic.
A, T > 2.539
B. > 2.845
C. T> .528D. T >2.861
Answer:
A. T > 2.539
Step-by-step explanation:
We have a hypothesis test of the mean, with unknown population standard deviation.
The hypothesis are:
\(H_0: \mu = 2.1 \\\\H_a: \mu > 2.1\)
From the hypothesis we can see that the test is right-tailed, so the critical value of t should be a positive value.
The degrees of freedom can be calculated as:
\(df=n-1=20-1=19\)
The significance level is 0.01, so the critical value tc should be the one that satisfies:
\(P(t>t_c)=0.01\)
Looking up in a t-table, for 19 degrees of freedom, this critical value is tc=2.539.
How do I solve for x
Answer:
x=-4
Step-by-step explanation:
The angles have to equal eachother, so:
130=134+x
subract 134 from both sides
-4=x
an important component of measurements is using the right/appropriate unit for what is being measured! what unit would you use to measure the length of our classroom (assume any classroom).
The required unit would you use to measure the length of our classroom are meters or feet.
What are measurement tools?The usual measurement equipment is composed of thermometers, rulers, yardsticks, scales, beakers, protractors, clocks, and measuring tape. Knowing how to use each instrument properly can make measuring more accurate and enjoyable. Each tool has a unique purpose.
According to question:To measure the length of a classroom, you would use the unit of meters or feet.
These are commonly used units for measuring length or distance. For example, you might say "The length of the classroom is 10 meters" or "The classroom is 30 feet long". The specific unit used might depend on the location and the system of units (metric or imperial) that is commonly used in that area.
It's important to choose a unit that is appropriate for the task at hand, and to be consistent in using that unit throughout the measurement process.
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Pablo used a total of 5 3/4 gallons of gas while driving his car. Each hour he was driving, he used 5/6 gallons of gas. What was the total number of hours he was driving? Write your ans