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Alexandra [31]
3 years ago
9

Five times a number is the same as two times a number added 21

Mathematics
1 answer:
Vera_Pavlovna [14]3 years ago
7 0

Answer:

Our number is 7.

Step-by-step explanation:

We also know that it's 2x + 21 = 5x.

Now we solve.

21 = 5x - 2x

21 = 3x

7 = x

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What is the algebraic expression for the area of this house block?
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x² + 27x + 180

Step-by-step explanation:

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4 0
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X+2<br> X-2<br> 2x+y<br> x + 1<br> what’s the answer
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( 3x - 2, 2x ± yx ) ± 1

Step-by-step explanation:

5 0
2 years ago
When Legs jumps 2 times and takes 13 steps forward, he lands in the same place as when he jumps 4 times and takes 5 steps backwa
tangare [24]

Answer:

9 steps

Step-by-step explanation:

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Second case

4x-5y

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4 0
3 years ago
Find the surface area of the cylinder in terms of pi
tia_tia [17]

Answer:

<u>A≈301.44</u>

Step-by-step explanation:

The area of a cylinder is A=2πrh+2πr^2

You first do the first problem of the equation (A=2πrh)

You fill in the radius and height ( A=2π(4)(8) )

You first multiply 4 x 8 = 32. ( A=2π(32) )

Then you multiply 2 x 32 = 64. ( A=π(64) )

Then you multiply π x 64 (using 3.14 for π) = 200.96 m^2

You then do the second part of the equation. (A=2πr^2)

You fill in the radius. (A=2π(4)^2)

Then multiply 4 x 4 = 16 (because it's to the power of 2 [4 times itself twice]) and then multiply it by 2.

16 x 2 = 32. ( A=π(32) )

Next you just multiply 32 x π (using 3.14 for π again) = 100.48 m^2.

Then you just add them together:

200.96 m^2 + 100.48 m^2 = 301.44 m^2

So <u>301.44 m^2</u> is your answer.

(I hopefully think it is.)

5 0
2 years ago
Read 2 more answers
Lucia made a scale drawing of a game room. The pool table is 3 inches long in the drawing. The actual pool table is 9 feet long.
Murrr4er [49]
3 feet is equal to 1 inch if she measured 3 inches to equal 9 feet
3 0
3 years ago
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