I need help with this

Answer:

  use "Help"

Step-by-step explanation:

You need to learn how your software expects to see "infinity." It may need to be spelled out "infinity" or abbreviated "inf" or "infty".

For starters, I suggest you use the "Help" link on the page you show. If that doesn't answer the question, then consult with your instructor.

Answer:

Step-by-step explanation:

5y=20x+15

divide both sides by 5

y=4x+3

Below, you'll find a list of all the answers to the questions which are solved by using proportional relationship.

The general equation for a straight line is y=mx + c, where m represents the line's slope and expresses the rate of change of y per unit time with respect to x.

The point where the graph crosses the y-axis is called the y-intercept, or c.

Direct proportionality is also represented by y = mx. We can express m as follows: m = y/x

OR

y₁/x₁ = y₂/x₂

In our cafeteria, lemonade is made using a powdered drink mix. The quantity of water required to manufacture a certain amount of powdered drink mix is proportional to the number of scoops required. For every 2 scoops of mix, 1/2 gallon of water is required, and for every 5 scoops,

1 1/4 gallons of water are required.

The proportional formula is written as y = k x.

Using the information provided, we can now write: 2 scoops require 0.5 gallon of water.

1.25 gallon of water is required for 6 scoops.

This means that k = 2/0.5

k = 2/(1/2)

k = 2 x 2

k= 4

Equations describing the relationship can be expressed as y = 4x + c.

0.5 gallon of water is now required for 2 scoops.

2=4(1/2)+c

2=2+c

c=0

Therefore, the formula will be y = 4x.

The end includes a graph for y = 4x.

12 scoops of water:

12=4x

x=3 gallons of water is needed.

To know more about proportional relationship, visit:

https://brainly.com/question/29765554

#SPJ1

Answer:

1. 84 2. 360

Step-by-step explanation:

Use multiplication l*w*h

The number of alligators was there in Orange country, Florida in 2001 is equal to 43872.

The Latin term "per centum," which signifies "by the hundredth," was the source of the English word "percentage." Segments with a denominator of 100 are considered percentages. In other words, it is a relationship where the worth of the entire is always considered 100.

As per the given information provided in the question,

Total number of alligators 1992 = 285

Percent increase of alligators every year = 75%

Total number of years from 1992 to 2001,

2001 - 1992 = 9 years

The population of alligators in 2001,

= 285 × (175/100)⁹

= 285 × (7/4)⁹

= 43871.98 or,

= 43872 alligators.

To know more about Percentage:

https://brainly.com/question/29306119

#SPJ1

Answer:

They walk the same.

Step-by-step explanation:

Dan = 6/8 miles = 0.75 miles

Beth = 3/4 miles = 0.75 miles

=> They walk the same distance

Answer:

25/9

Step-by-step explanation:

3 1/3 ÷ 1 1/5

3 1/3 = 10/3

1 1/5 = 6/5

10/3 ÷ 6/5 = 10/3 x 5/6 = 50/18 = 25/9

So, the answer is 25/9

Answer:

The quotient of z₁ by z₂ in trigonometric form is:

7/21 * (cos(584°) + i sin(584°))

To find the quotient of z₁ by z₂ in trigonometric form, we'll express both complex numbers in trigonometric form and then divide them.

Let's represent z₁ in trigonometric form as z₁ = r₁(cosθ₁ + isinθ₁), where r₁ is the magnitude of z₁ and θ₁ is the argument of z₁.

We have:

z₁ = 7(cos(577°) + i sin(577°))

Now, let's represent z₂ in trigonometric form as z₂ = r₂(cosθ₂ + isinθ₂), where r₂ is the magnitude of z₂ and θ₂ is the argument of z₂.

From the given information, we have:

z₂ = 21(cos(-7°) + i sin(-77°))

To find the quotient, we divide z₁ by z₂:

z₁ / z₂ = (r₁/r₂) * [cos(θ₁ - θ₂) + i sin(θ₁ - θ₂)]

Substituting the given values, we have:

z₁ / z₂ = (7/21) * [cos(577° - (-7°)) + i sin(577° - (-7°))]

= (7/21) * [cos(584°) + i sin(584°)]

The quotient of z₁ by z₂ in trigonometric form is:

7/21 * (cos(584°) + i sin(584°))

Option C, 21(cos(-7°) + i sin(-77°)), is not the correct answer as it does not represent the quotient of z₁ by z₂.

For more questions on trigonometric form

https://brainly.com/question/31744474

#SPJ8

Answer:

  the cost function is defined as a step function

Step-by-step explanation:

You want to know why a cost graph has steps.

In the US, current first class postage rates for appropriately sized envelopes are 60¢ for the first ounce, and 24¢ for each additional ounce.

Envelopes below a certain weight cannot be mailed, and above that minimum (up to at most one ounce), the cost will be 60¢. That is, the first step is at cost=60¢, and extends from some minimum weight up to 1 ounce at that cost.

Above one ounce -- even very slightly above, the cost is 84¢. There is no weight where the cost is 61¢ or 62¢ or any other number between 60¢ and 84¢.

For the purpose of determining cost, the weight is rounded up to the next higher ounce. This guarantees that cost values will be a discrete set of values.

The weight can take on any real value. This is reflected in the continuous horizontal line at each level of cost.

The hollow circle at 1 ounce on the second step means that the cost for one ounce is not the value of that second step. The filled circle indicates the cost for one ounce is the value of the first step. The hollow circle also indicates that weights arbitrarily close to 1 ounce, but greater, will cost the same as for 2 ounces.

__

Additional comment

The minimum weight envelope that can be mailed first class will be a function of its size. Outside a certain size and weight range, the envelope will not be "machinable," so will incur an extra charge.

The density of the bronze is approximately 8.72 g/cm^3.

Density is the physical property of a substance that gives the relationship between it's mass and volume. It is defined as amount per unit volume. In simple words, density means how tightly the particles or molecules of a solid substance is packed.

To calculate the density of bronze, first we have to calculate total volume of bronze and total mass of bronze.

In the question, we have been given with 450g of copper, 63g of tin, density of copper is 9g/cm^3, and density of tin is 7g/cm^3.

First let's calculate total mass of bronze:

Total mass of bronze = Mass of copper + Mass of tin

Total mass of bronze = 450 g + 63 g

Total mass of bronze = 513 g

Now, let's find out the volume of bronze. We can use the concept of density to find the volume.

Volume of copper = Mass of copper / Density of copper

Volume of copper = 450 g / 9 g/cm^3

Volume of copper = 50 cm^3

Volume of tin = Mass of tin / Density of tin

Volume of tin = 63 g / 7 g/cm^3

Volume of tin = 9 cm^3

Total volume of bronze = Volume of copper + Volume of tin

Total volume of bronze = 50 cm^3 + 9 cm^3

Total volume of bronze = 59 cm^3

Now, we can calculte the density of bronze:

Density of bronze = Total mass of the bronze / Total volume of the bronze

Density of bronze = 513 g / 59 cm^3

Density of bronze = 8.72 g/cm^3 (rounded to two decimal places)

Therefore, the density of the bronze is approximately 8.72 g/cm^3.

To study more about Density:

https://brainly.com/question/6838128

Answer: 420 different codes.

Step-by-step explanation:

We have eight digits, {0, 0, 0, 0, 2, 2, 4, 4}

For the first digit of the code, we will have 8 options.

For the second we will have 7 options (because we already took one)

for the third one we will have 6 options, and so on.

for the fourth, we will have 5 options

for the fifth, there are 4 options.

for the sixth, there are 3 options.

for the seventh, there are 2 options.

And for the last, there is only one option.

The total number of combinations will be equal to the product between the numbers of options for each digit, then we will have:

C = 8*7*6*5*4*3*2*1

But there is something more, the zeros can permute and will give the same code (So we are counting the same code several times), we have 4 zeros, then the number of permutations of the zeros is:

4*3*2*1  = 24

the 4's also are repeated, two times in this case, the number of permutations is:

2*1 = 2

And the 2's also are repeated, also two times, the number of permutations is:

2*1 = 2

Because we do not want to count these repetitions, we need to divide the total number of combinations by these 3 numbers of permutations

This means that we need to divide the number of different combinations will be:

c = (8*7*6*5*4*3*2*1)/(24*2*2) = 420

So we can conclude that there are 420 different codes.

The number of eight digit codes she can make using the digits in her birthday is; 420 eight digit codes

The 8 digits code of her birth date are;

0, 4, 0, 2, 2, 0, 0, 4

Now, since there are 8 digits, then number of ways of arranging the 8 digits is 8!

Since there are some repetitions, then we have to consider the permutations for them too.

There are four 0's which is 4!

There are two 2's which is 2!

There are two 4's which is 2!

Thus, number of 8 digit codes she can make using the digits on her birthday is;

8!/(4! × 2! × 2!) = 420 eight digit codes

Read more about permutations and combinations at; https://brainly.com/question/15301090

Answer:

Thats for question number 4 and 5, i don't know for 3

The Distance will be  5.

The distance between two points is the length of the line segment connecting the two points on the plane. The formula for finding the distance between two points is usually d=√((x2 – x1)² + (y2 – y1)²). This formula is used to find the distance between any two points on the coordinate or x-y plane.

Let point (7,5) be A and point (4,9) be B

Distance formula =

Ab  = √(x1- x2) ² + (y1 -y2) ²

Then Distance AB will be

Ab  = √(7-4) ² + (5 -9) ²

= √ 3² + 4²

= √ 9 + 16

= 5

Hence the distance  will be 5.

Learn more distance between the points at :

https://brainly.com/question/15958176

The points \((7,5)\)  \((4,9)\) are separated by a distance of \(5\) units.

The distance between the two points is given by the length of the segment between them.

The Distance Formula is a helpful tool for figuring out how far apart two points are when they are arbitrarily represented on a coordinate plane as points A\((x_{1},y_{1})\) and B\((x_{2},y_{2})\).

The Pythagorean Theorem is essentially the source of the Distance Formula. Calculating the right triangle's hypotenuse's length is the fundamental purpose of the distance formula.

Use the distance formula to get the distance between two places.

\(d = \sqrt{ (x_{2} - x_{1})^{2} +(y_{2} - y_{1})^{2} }\)

In the posted query,

\((x_{1},y_{1})=(7,5)\\\\(x_{2},y_{2})=(4,9)\)

Distance formula,

\(d = \sqrt{ (x_{2} - x_{1})^{2} +(y_{2} - y_{1})^{2} }\)

\(d = \sqrt{ (4-7)^{2} +(9-5)^{2} }\)

\(d = \sqrt{ (-3)^{2} +(4)^{2} }\)

\(d = \sqrt{ 9+16 }\)

\(d = \sqrt{ 25 }\)

\(d = 5\)

Therefore, the points \((7,5)\)  \((4,9)\) are at a distance of \(5\) units.

For more information about Distance Formula: https://brainly.com/question/7245260

Answer: 13.5 ounce bottle for $2.19

a 29.2 ounce bottle for $5.37

The 29.2 ounce bottle is better

Step-by-step explanation:

13.5 ounce bottle for $2.19

a 29.2 ounce bottle for $5.37

find the ratios

13.5/2.19 = $6.16 per unit

29.2/5.37 = $5.44 per unit

Answer:

True

Step-by-step explanation:

A matrix needs to be in a same size

In order to be increased, decreased, etc

So it is true

It won't be false trust me ;)

I hope this helps you :)

Answer:

UR

2y2+5

2.2y+5

4y+5

SE

y2+6y

2y+6y

8y

Answer:

169.09 degrees

Step-by-step explanation:

Interior Angle of a polygon with 33 sides = (n-2) x 180/n degrees = (33-2) x 180/33 degrees = 169.09 degrees

33 sides

the size if each interior angle.

\( \frac{360}{33} \)

\( = 10.91\)

\(180 - 10.91\)

\( = 169.09\)

\( \frac{169.09}{33} \)

\( = 5.12\)

hence, the size of each interior angle is 5.12°

Answer:

x=-10

Step-by-step explanation:

since there's a given 120 degrees, and it's a isosceles triangle, we know that the line adds up to 180 (where the 120 degrees is). so 120+x=180, the interior angle measures 60 degrees. That being said, the 3 angles measure 60 degrees also. now there's a right angle mark on top, so we find the angle of the smaller triangle (near angle 2) by doing 90-60=30 degrees.

angle 2 is said to be x+160, and there's a line, which tells us that they must add to 180.. so x+160+30=180

x+190=180

x=-10.

Answer:

26

Step-by-step explanation:

Fifteen minues negative eleven equals to twenty six. Hope this helps and good luck with your assignment.

15-(-11)=26

The value of x is 26 .

Given,

-11+blank equals 15 .

Now,

Let the number in the blank be x .

So, rewriting the equation with x,

-11 + x = 15

Now combine the like terms,

x = 11 + 15

x = 26

Thus the blank is equal to 26 .

Know more about equations,

https://brainly.com/question/17181370

#SPJ6

Answer:

exact form : 2√3

decimal form : 3.46410161… or 3.46

hope this helps you!

Answer:

The value of the function is \(\sqrt{12}\). Rounded to the nearest hundredth, the answer is 3.46

Step-by-step explanation:

We are given the value of x, so we simply have to evaluate the function:

\(f(x)=\sqrt{x+4}\)

Substitute 8

\(f(8)=\sqrt{8+4}\)

Add in the radical

\(\sqrt{12}\)

The value of the function is sqrt(12).

Rounded to the nearest hundredth: \(3.46\)

Answer:

5/7

Step-by-step explanation:

ratio of boys to girls---> 2:5

ratio sum: 2+5=7

girls ratio =5/7

OR

total of people in 7th grade choir=28

hence, no of girls in 7th grade choir=5/7 × 28

=20

proportion of girls in choir= 20/28 = 5/7

Answer:

-15

Step-by-step explanation:

The solution of expression for x = - 4 is,

⇒ - 15

We have to given that,

An expression is,

⇒ 2x - 7

Now, We can simplify the expression for x = - 4 as,

An expression is,

⇒ 2x - 7

Plug x = - 4;

⇒ 2 × - 4 - 7

⇒ - 8 - 7

⇒ - 15

Thus, The solution of expression for x = - 4 is,

⇒ - 15

Learn more about the equation visit:

brainly.com/question/28871326

#SPJ6

A simple random population that is normally distributed then the 95% confidence interval is (104.02, 111.98)

In mathematics and statistics, the mean refers to the average of a set of values. The mean can be computed in a number of ways, including the simple arithmetic mean (add up the numbers and divide the total by the number of observations), the geometric mean, and the harmonic mean.

Given that,

Sample Mean = 108,

Standard deviation = 10,

Sample n = 25,

Degree of freedom = n-1

n - 1 = 25 - 1

n - 1 = 24.

t-value corresponding to 24 degrees of freedom and 95% confidence level is 1.990

Confidence Interval = Mean + or - Error margin

Error margin (E) = (t×sd)/√n

E = (1.990×10)/√25

E = 19.9/5

E = 3.98

Lower bound = mean - E

= 108 - 3.98

= 104.02

Upper bound = mean + E

= 108 + 3.98

= 111.98

Therefore,

A simple random population that is normally distributed then the 95% confidence interval is (104.02, 111.98)

To learn more about Confidence interval visit :

brainly.com/question/13646086

#SPJ4

0.007, also known as the thousandths place in decimals.

it is a. Yes it can, because −2.5 lies to the left of −0.5. plz mark me as brainiest and tell me if I am wrong

Answer:

a) The mean is of \(\mu = 0.16\)

b) The standard deviation is of \(s = 0.008\)

Step-by-step explanation:

Central Limit Theorem

The Central Limit Theorem establishes that, for a normally distributed random variable X, with mean \(\mu\) and standard deviation \(\sigma\), the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \(\mu\) and standard deviation \(s = \frac{\sigma}{\sqrt{n}}\).

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

For a proportion p in a sample of size n, the sampling distribution of the sample proportion will be approximately normal with mean \(\mu = p\) and standard deviation \(s = \sqrt{\frac{p(1-p)}{n}}\)

Question a:

Exactly 16% of all applications were from minority members

This means \(p = 0.16\), and thus, the mean is of \(\mu = p = 0.16\)

b. Find the standard deviation of p.

2100 open positions, thus \(n = 2100\).

\(s = \sqrt{\frac{p(1-p)}{n}}\)

\(s = \sqrt{\frac{0.16*0.84}{2100}}\)

\(s = 0.008\)

The standard deviation is of \(s = 0.008\)

Answer:

{(2,3), (-5,2), (1,8), (6,3), (-6, 2)

Step-by-step explanation:

The domain is the input and the range is the output

We need inputs of -6 -5 1 2 6

and outputs of 2 3 and 8