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3 years ago

7

The scale model of a building is 5.4 feet tall. If the original building is 810 meters tall, what was the scale used to make the

model?

1 answer:

posledela3 years ago

7 0

810/ 5.4 = 150. So the scale used was 150

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Last week, it rained x inches. This week, the amount of rain decreased by 5%. Which expressions represent the amount of rain tha

sineoko [7]

I think the answer would be A because 5% ×100=0.05 , and in the question they have been telling us that it decreased by 5 from the last week so the equation would be g of the last week - 0.05

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3 years ago

The diagram below shows two

LiRa [457]

Answer:

4 cm

Step-by-step explanation:

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6 0

3 years ago

X=square root of 880-8x

Sunny_sXe [5.5K]

$x=\sqrt{880-8x}\\
D:880-8x\geq0 \wedge x\geq0\\
D:8x\leq880 \wedge x\geq0\\
D:x\leq 110 \wedge x\geq0\\
D:x\in\langle0,110\rangle\\
x^2=880-8x\\
x^2+8x-880=0\\
x^2+8x+16-896=0\\
(x+4)^2=896\\
x+4=8\sqrt{14} \vee x+4=-8\sqrt{14}\\
x=-4+8\sqrt{14} \vee x=-4-8\sqrt{14}\\
\\ x=-4-8\sqrt{14}\not \in D \Rightarrow \boxed{x=-4+8\sqrt{14}}$

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3 years ago

7(2а - 3) - 5a = -3<br><br> please show the work

Otrada [13]

Answer:

a = 2

Step-by-step explanation:

14a - 21 - 5a = -3

9a - 21 = -3

9a = -3 + 21

9a = 18

a = 2

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