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3 years ago

an elevator traveled up to the 9th floor and then down to the third floor. how many floors did the elevator travel down

Mathematics

1 answer:

11Alexandr11 [23.1K]3 years ago

7 0

Answer:

in went down 6 floors.

Step-by-step explanation:

9-6=3 so that's how I found the answer.

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- 5x + 2y = 9<br> y = 7x

Lorico [155]

Answer:

Explanation:

- 5x + 2y = 9

y = 7x

<u>Insert 7x For 'y'</u>

- 5x + 2(7x) = 9

<u>Remove Parenthesis</u>

-5x + 2 · 7x = 9

<u>Multiply: 2 · 7 = 14</u>

-5x + 14x = 9

<u>Add: -5x + 14x = 9x</u>

9x = 9

<u>Divide Both Sides By 9</u>

9x ÷ 9 = 9 ÷ 9

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2 years ago

What is the value of x? Enter your answer in the box

USPshnik [31]

It is equilateral triangle, so the 3 sides have the same length

5x - 22 = 4x - 10
5x - 4x = -10 + 22
x = 12

The value of x is 12

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3 years ago

Solve the system.<br> 3x + 4y = 7<br> 2x-y=1<br> What does x and y equal

emmainna [20.7K]

Answer:

x=1 y=1

Step-by-step explanation:

Let's use the elimination method.
3x+4y=7
2x-y = 1 (multiply both sides by 4)
8x-4y=4
3x+4y=7

(add both equations together)
11x=11
x=1
Plug x=1 into either of the equations
2(1) - y=1
2-y=1
2=1+y
y=1

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2 years ago

Which radical expression is in simplified form A. 11y/sqrt3 B. sqrt6/5y C. sqrt17/sqrt4 D. sqrt25/18

Mkey [24]

Answer: $\frac{\sqrt{6}}{5y}$

Step-by-step explanation:

The given radical expressions are:

$A. \frac{11y}{\sqrt{3}}\\\text{It is not completely simplified ,}\\\text{since denominator is radical, we need to rationalize it first to simplify. }\\\\B.\frac{\sqrt{6}}{5y}\\\text{It is completely simplified ,}\\\text{since its denominator is not radical and 6 is not a perfect square. }\\\\C. \frac{\sqrt{17}}{\sqrt{4}}\\\text{It is not completely simplified ,}\\\text{since denominator is radical, we need to rationalize it first to simplify. }\\\\$ $\\\\D. \frac{\sqrt{25}}{18}=\frac{5}{18}\\\text{Hence, expression D was not completely simplified .}$

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2 years ago

ACFG is a parallelogram, If AX = 4y + 3 and XF = 2y + 7, find AX.

pashok25 [27]

Answer:

AX=XF

4y+3=2y+7

4y-2y=7-3

2y=4

y=2

then,

AX=4y+3

=4×2+3

=8+3

=11

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2 years ago

an elevator traveled up to the 9th floor and then down to the third floor. how many floors did the elevator travel down​

an elevator traveled up to the 9th floor and then down to the third floor. how many floors did the elevator travel down