I need help with all of em please

Answer:

Yes

Step-by-step explanation:

1/4+1/4+1/4=3/4 can also be written as

3*1/4

Answer:

one of the options are correct

Step-by-step explanation:

Given the expression 2 + 32*5-3, we are to locate the point where parenthesis will be placed to get 44;

There is no point where we are we are going to put parenthesis to get 44

For Option A :

2+32×(5−3)

= 2+ 32 * 2

According to PEMDAS, multiplication is next in precedence

= 2(32*2)

= 2(64)

= 128

For Option B:

2+(32*5)-3

= 2+160-3

= 162-3

= 159

For Option C:

(2+32) * 5 - 3

= 34 * 5 -3

= 170-3

= 167

For Option D:

(2+3)2*5 - 3

5(2)*5 - 3

10*5 -3

= 50 - 3

= 47

From the expansion, none gave us 44, hence none of the options are correct

Answer:

The solution is (-2, 0)

Step-by-step explanation:

Re-write -2x=-y+4 x=-2 in column form:

x=-2

-2x=-y+4

Next, substitute -2 for x in the second equation:

-2(-2) = -y + 4, or:

4 = -y + 4.  Thus, y must be 0.

The solution is (-2, 0)

Answer:

\(20(1 - 0.25) \\ \\ 20 \times ( \frac{20}{20} - \frac{20 \times 0.25}{20} )\)

Here are answers to adding parentheses to the expressions to indicate how Java will interpret them.

(a) a * b - c * d / e
Java interpretation: (a * b) - ((c * d) / e)

(b) a - b * c % d - e
Java interpretation: (a - ((b * c) % d)) - e

(c) -a - b * c / d / e
Java interpretation: (-a) - (((b * c) / d) / e)

(d) a / b % c + d - e
Java interpretation: (((a / b) % c) + d) - e

Note: Adding parentheses to expressions helps to clearly indicate the order in which Java will interpret them. This is important for ensuring the desired outcome of the expression.

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Answer: It is c

Step-by-step explanation: Im doing the test and did some research.

But if you are seweing this on 9/22/2020 please wait for me to put the confirmed answer in the comments.

Answer:

It's c

Step-by-step explanation:

Answer:

254.34 m²

Step-by-step explanation:

The formula used to find the area of a circle is π · r².
The radius of a circle is half of it's diameter.
Using the given values, we can solve:

3.14 · 9²

3.14 · 81

= 254.34 m²

hope this helps!

Answer:

Area = 254.469004940773 m²

Step-by-step explanation:

formula : (area of a circle)

Area = π × r²

where r is the radius of the circle

\(\large \text r = \frac{\large \text Diameter \ of \ the \ circle }{2} = \frac{18}{2} =9\ m\)

then

Area = π × 9²

        = π × 81

        = 254.469004940773 m²

Multiplication is not possible with so similar variables in the denominator, in the given fractions and hence the answer is incorrect.

So, -4y × 1/5y:

Theefore, multiplication is not possible with so similar variables in the denominator, in the given fractions and hence the answer is incorrect.

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Answer:

63

Step-by-step explanation:

A median bisects the side that it is drawn to, so

So, FN = 4(15) + 3 = 63.

Once again, since a median bisects the side it is drawn to, NE = 63.

Answer:

56 kilometers

Step-by-step explanation:

The answer is in the question it travels 56 km/h this means every one hour the car goes 56 km

Answer:

56km

Step-by-step explanation:

I got 56km because the car drives at a constant speed of 56 km/h. So, in one hour the car can travel 56km.

Therefore, the car can travel 56km in 1 hour.

(B) 108 minutes is Ryan's time.

So,

Ryan's rate of 4 miles per hour can be voiced in minutes as 4 miles per 60 minutes.

Ryan's time:

Therefore, (B) 108 minutes is Ryan's time.

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The correct question is given below;
Ryan is riding his bike. He biked a distance of 12 miles at a rate of 4 miles per hour. Rearrange the distance formula, d = rt, to solve for Ryan's time in minutes.

a. 480 minutes

b. 180 minutes

c. 8 minutes

d. 3 minutes

The LU factorization of matrix A is A = LU, where L = [[1, 0, 0], [-2, 1, 0], [1.5, -3, 1]] and U = [[4, -8, 10], [0, 24, -27], [0, 0, -12.5]].

Let's go step by step to find the LU factorization of matrix A.

Matrix A:

A =

[4, -8, 10]

[-8, 8, -7]

[6, -7, 3]

Step 1:

Initialize the L matrix as an identity matrix of the same size as A.

L =

[1, 0, 0]

[0, 1, 0]

[0, 0, 1]

Step 2:

Perform Gaussian elimination to obtain U.

- Multiply the first row of A by (1/4) and replace the first row of A with the result.

A =

[1, -2, 2.5]

[-8, 8, -7]

[6, -7, 3]

- Subtract 8 times the first row of A from the second row of A and replace the second row of A with the result.

A =

[1, -2, 2.5]

[0, 24, -27]

[6, -7, 3]

- Subtract 6 times the first row of A from the third row of A and replace the third row of A with the result.

A =

[1, -2, 2.5]

[0, 24, -27]

[0, 5, -12.5]

Step 3:

Update the L matrix based on the operations performed during Gaussian elimination.

L =

[1, 0, 0]

[0, 1, 0]

[0, 0, 1]

Step 4:

The resulting matrix A is the upper triangular matrix U.

U =

[1, -2, 2.5]

[0, 24, -27]

[0, 5, -12.5]

Therefore, the LU factorization of matrix A is:

L =

[1, 0, 0]

[0, 1, 0]

[0, 0, 1]

U =

[1, -2, 2.5]

[0, 24, -27]

[0, 5, -12.5]

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Answer:

\(Sin ~0 =\frac{2\sqrt{5} }{5}\)

Step-by-step explanation:

\(sec0=\sqrt{5}\)

\(cos~0=\frac{1}{sec0} =\frac{1}{\sqrt{5} }\)

\(sin ~0=\sqrt{1-cos^2~0}\)

\(=\sqrt{1-1/5}=\sqrt{5-1/5}\)

\(Sin~0=\sqrt{4/5} =2/\sqrt{5}*\sqrt{5}/\sqrt{5}\)

\(Sin~0=2\sqrt{5}/2=2\sqrt{5}/5\)

--------------------------------

hope it helps...

have a great day!!!

Answer:

To multiply terms, multiply the coefficients and add the exponents on each variable. The number of terms in the product will be equal to the product of the number of terms.

Step-by-step explanation:

For example, 3 is the coefficient in 3x. Rather than using a multiplication sign between 3 and x, the number is just written in front of a variable, which means that the 3 and x are multiplied together. Instead of writing a + a + a + a, you can express it as 4a, with 4 being the coefficient.

The equivalent sum of the given expression is 15.

Addition of a number to an existing number is a method of increasing the magnitude of the existing number.

We can explain addition as -

{a} + {b} = {c}

For example -

2 + 3 = 5

Given is to find the sum -

2 + 2 + 2 + 3 + 2+ 2 + 2

We can write the sum as -

2 + 2 + 2 + 3 + 2+ 2 + 2

4 + 5 + 4 + 2

9 + 4 + 2

15

Therefore, the equivalent sum of the given expression is 15.

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{Question in English -

What is 2 + 2 +2 +3 +2+ +++2++ +2?}

Answer:

D {(5,6), (8,6), (9,6)}

Answer:

A = ± \(\sqrt{\frac{q+3g}{b^2} }\)

Step-by-step explanation:

Given

b²A² - 3g = q ( add 3g to both sides )

b²A² = q + 3g ( divide both sides by b² )

A² = \(\frac{q+3g}{b^2}\) ( take the square root of both sides )

A = ± \(\sqrt{\frac{q+3g}{b^2} }\)

It's C on edge 21

Step-by-step explanation:

Yx2-3

The expression cos (125°) - cos 55° cos 35° cos 55° can be written as cos (55°) + cos (55°) cos (35°) cos (55°).

cos (125°) can be rewritten as cos (180° - 125°). Similarly, cos (35°) can be rewritten as cos (180° - 35°). Therefore, the expression can be written as:

cos (180° - 125°) - cos (55°) cos (180° - 35°) cos (55°)

Simplifying further, we have:

cos (55°) - cos (55°) cos (145°) cos (55°)

Since 145° is the supplement of 35°, we can rewrite it as:

cos (55°) - cos (55°) cos (180° - 35°) cos (55°)

Now, cos (180° - 35°) is equal to -cos (35°). Therefore, the expression becomes:

cos (55°) + cos (55°) cos (35°) cos (55°)

Hence, the expression as a function of an acute angle is:

cos (55°) + cos (55°) cos (35°) cos (55°)

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Answer: false

Step-by-step explanation:

Answer:

0.8 miles

Step-by-step explanation:

0.2 x 4 = 0.8

Net Positive Suction Head (NPSH) refers to the difference between the absolute fluid pressure at the pump suction and the fluid vapour pressure. The equation for calculating NPSH is:

NPSH = Ha – (Hvap + Hf + Hfittings).

The required pump power was found to be 2017 W.

(a) Net Positive Suction Head (NPSH)

Net Positive Suction Head (NPSH) refers to the difference between the absolute fluid pressure at the pump suction and the fluid vapour pressure. It is an important parameter for the operation of the pump.

It ensures the avoidance of cavitation within the pump, which can lead to damage. The formula for calculating NPSH is given as;

NPSH = Ha – (Hvap + Hf + Hfittings)

where Ha is the absolute pressure at the pump suction; Hvap is the vapour pressure of the fluid; Hf is the fluid friction head; and Hfittings are the head losses at fittings.

Conclusion: Net Positive Suction Head (NPSH) is an important parameter for the operation of the pump. It is the difference between the absolute fluid pressure at the pump suction and the fluid vapour pressure. It ensures the avoidance of cavitation within the pump, which can lead to damage.

(b) Given; maximum water flow rate, Q is 10 m³/min; water level at reservoir, Hr is 10 m; diameter of the pipe, D is 500 mm = 0.5 m.

Loss coefficients at various pipeline fittings (refer to the image given).

The equation for calculating the head losses is given as;

Hf = K (v²/2g)

where Hf is the head loss; K is the loss coefficient; v is the fluid velocity; and g is the acceleration due to gravity.

The velocity of the fluid in the pipe is given as;

Q = Av

where A is the cross-sectional area of the pipe.

Substituting

A = πD²/4;

Q = 10 m³/min

= 0.17 m³/s;

D = 0.5 m

The fluid velocity v = Q/A

= (0.17)/(π(0.5)²/4)

= 0.86 m/s

Head losses at fittings;

Hf = K (v²/2g)

= 1.5 × (0.86²/2 × 9.81)

= 0.058 m

Loss in the inlet section of the pipe;

Hf = K (v²/2g)

= 0.5 × (0.86²/2 × 9.81)

= 0.015 m

Head required to lift water from lake to the reservoir;

Hl = Hr

= 10 m

Total head loss;

Ht = Hfittings + Hf + Hl

= 1.5 + 0.058 + 0.015 + 10

= 11.57 m

Required pump power = density of water × flow rate × total head

= 1000 × 0.17 × 11.57

= 2017 W

Thus, the required pump power was found to be 2017 W.

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The equation is y = 4/1x + 13.

When you see #/# that is your slope while the last # in this form is your intercept.

Answer:

2

Step-by-step explanation:

the addition to the right is 7+3 = 10

write 0 and add 1 to the addition to the left

1+1 = 2. So we must add 2 to have 4

2+2 = 4

The trigonometric expression csc²θ(1-cos²θ) can be simplified to 1.

To simplify the expression csc²θ(1-cos²θ), we can start by using the Pythagorean identity sin²θ + cos²θ = 1. Rearranging this identity, we have cos²θ = 1 - sin²θ.

Substituting this value into the expression, we get csc²θ(1 - (1 - sin²θ)). Simplifying further, we have csc²θ(sin²θ).

Using the reciprocal identity cscθ = 1/sinθ, we can rewrite the expression as (1/sinθ)²(sin²θ).

Squaring the reciprocal, we have (1/sinθ) × (1/sinθ) * sin²θ. Multiplying these terms together, we get 1/sinθ.

Finally, using the reciprocal identity sinθ = 1/cscθ, we can simplify the expression to 1/(1/cscθ), which simplifies to cscθ.

Therefore, the simplified form of the trigonometric expression csc²θ(1-cos²θ) is 1.

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A multiplier of 1.2 means the value is multiplied or increased by a factor of 1.2.

A multiplier is a term used to represent a factor by which a value is multiplied or increased. It is a numeric value that indicates the extent of the increase or expansion of a given quantity. Multiplication by a multiplier results in scaling or changing the magnitude of the original value.

A multiplier of 1.2 indicates that a value will be increased by 20% or multiplied by a factor of 1.2. This means that when the multiplier is applied to the original value, the resulting value will be 1.2 times the original.

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