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2 years ago

Which describes the first step in solving the equation 4x - 7 = -15?

Mathematics

1 answer:

GalinKa [24]2 years ago

7 0

Answer:

Add 7 to both sides

Step-by-step explanation:

You would need to add 7 to both sides to cancel out the 7 on the right side of the equation to get x one step closer to being by itself.

Then you would get 4x = -8.

Next divide by 4 on both sides to get x by itself so do the inverse operation of what 4 was doing to x.

x = -2

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Write an algebraic expression: 4 groups of y.

Dvinal [7]

4y is your answer because ffor is the mathmatical term for multiplying in any word problem.

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2 years ago

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The width of a rectangle is 8 inches longer than its length. The perimeter is 104 inches.

Vesna [10]

Answer:

The width of the rectangle is 56 and the length is 48

Step-by-step explanation:

divide the perimeter in half (52 + 52)

then subtract 4 from one of the 52's

you get the answer of 56 and 48

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3 years ago

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Zeke and Niko are eating cookies. The ratio of the number of cookies Zeke ate to the number Niko ate was 2 to 1 (so Zeke had twi

Alexeev081 [22]

Answer:

Step-by-step explanation:

1/2 of 12 is 6

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1 year ago

Put together, Dulcina and Tremaine have 129 total matchbooks. Tremaine's collection has 39 fewer matchbooks in it than Dulcina's

Anit [1.1K]

Answer:

Let the Dulcina's collection be 'x'

Let the Tremaine collection be 'x-39'

x + x - 39 =129

2x = 129 +39

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x = 168/2

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2 years ago

Please help timed question (question included in photo). I'll mark as brainiest!

Shtirlitz [24]

Answer:

Step-by-step explanation:

This is a right triangle trig problem. Picture a right triangle. The height of the triangle is the height of the lighthouse, your distance from the base of the lighthouse is what we are solving for, and the reference angle is 2 degrees, which is the angle of inclination from where you stand to the top of this lighthouse. We have the reference angle, the side opposite the reference angle, and we are looking for the side adjacent to the reference angle. This is the tangent ratio: the side opposite the reference angle over the side adjacent to the reference angle. We know the measure of the reference angle and we know the value of the side opposite the reference angle. Filling in:

$tan(2)=\frac{200}{x}$ and

$x=\frac{200}{tan(2)}$ so

x = 5727.25 feet, the third choice down

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