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2 years ago

Which of the following expressions is equivalent to 2x + y − 4y + 8?

Mathematics

2 answers:

cluponka [151]2 years ago

8 0

Answer:

a) 2x - 3y + 8

Step-by-step explanation:

Problem: 2x + y - 4y + 8

Solve: y - 4y

Put it back into the expression: 2x - 3y + 8

sesenic [268]2 years ago

7 0

I agree. If y is one for example 1-4 is -3

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A(n+y)=10t+32 solve for y

Firlakuza [10]

Step-by-step explanation:

a(n+y) = 10t + 32

n+ y = (10t + 32)/a

y = ((10t+32) /a) -n

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2 years ago

Read 2 more answers

Find the distance between A and B.

Andreas93 [3]

Answer:

$\sqrt{34}$ units

Step-by-step explanation:

A = (-4,-1)

B = (1,2)

distance between 2 points:

$d=\sqrt{(x_{2}-x_{1})^{2}+(y_{2}-y_{1} )^{2}}\\\\d=\sqrt{(1-(-4))^{2}+(2-(-1))^{2}}\\ \\d=\sqrt{(5)^{2}+(3)^{2}}\\\\d=\sqrt{34}$

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3 years ago

A circle has a radius of 5 in. A central angle that measures 150° cuts off an arc.

Slav-nsk [51]

Answer:

Part 1) The exact value of the arc length is $\frac{25}{6}\pi \ in$

Part 2) The approximate value of the arc length is $13.1\ in$

Step-by-step explanation:

step 1

Find the circumference of the circle

The circumference of a circle is equal to

$C=2\pi r$

we have

$r=5\ in$

substitute

$C=2\pi (5)$

$C=10\pi\ in$

step 2

Find the exact value of the arc length by a central angle of 150 degrees

Remember that the circumference of a circle subtends a central angle of 360 degrees

by proportion

$\frac{10\pi}{360} =\frac{x}{150}\\ \\x=10\pi *150/360\\ \\x=\frac{25}{6}\pi \ in$

step 3

Find the approximate value of the arc length

To find the approximate value, assume

$\pi =3.14$

substitute

$\frac{25}{6}(3.14)=13.1\ in$

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2 years ago

What is the sum of -5 and -5?<br> -10<br> 10<br> 0

Kipish [7]

Answer:

-10

Step-by-step explanation:

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2 years ago

A rectangle's length is three times its width. Let w denote the rectangle's width. What polynomial represents the rectangle's ar

Nataliya [291]

Width = W
Length = 3 times w = 3W

Area = length x width = 3W * W = 3W^2

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2 years ago