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3 years ago

6

a mural will be painted on a wall that is 63.5 inches high and 7 yards long. The wall also has two windows that are 2.5 square f

eet each. how much surface area will be painted?

1 answer:

nydimaria [60]3 years ago

5 0

So the answer might be 61.0 because if you subtract (-)63.5 with 2.5 it would 61.0 so i dont know ..but good luck and if i fail you im so sorry

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Solve both by substitution method (algebra 2) and show work please<br><br> -2x-7y=22<br>-7x-5y=-1

Alex17521 [72]

$\bf \begin{cases}
-2x-7y=22\\
-7x-5y=-1
\end{cases}\qquad \textit{let's solve the \underline{second one} for "x"}
\\\\\\
-7x-5y=-1\implies -7x=5y-1\implies x=\cfrac{5y-1}{-7}
\\\\\\
\boxed{x=\cfrac{1-5y}{7}}\impliedby \textit{now, let's substitute it in the \underline{first one}}
\\\\\\$

$\bf -2\left( \frac{1-5y}{7} \right)-7y=22\implies \cfrac{10y-2}{7}-7y=22
\\\\\\
\textit{now, let's multiply both sides by 7, to toss the denominator}
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7\left( \cfrac{10y-2}{7}-7y \right)=7(22)\implies 10y-2-49y=154
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-39y=156\implies y=\cfrac{154}{-39}\implies \boxed{y=-4}
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\textit{now, let's use that in the \underline{first one}}
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-2x-7(-4)=22\implies -2x+28=22\implies 6=2x\implies \cfrac{6}{2}=x
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\boxed{3=x}$

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2 years ago

Jeremy drove 812 miles on 24.3 gallons of gas. what was his gas mileage, rounded to the nearest mpg?

yuradex [85]

The answer is D because you have to divide 812 by 25.3

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3 years ago

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The capacity of an elevator is 12 people or 2088 pounds. the capacity will be exceeded if 12 people have weights with a mean gre

boyakko [2]

suppose the people have weights that are normally distributed with a mean of 177 lb and a standard deviation of 26 lb.

Find the probability that if a person is randomly selected, his weight will be greater than 174 pounds?

Assume that weights of people are normally distributed with a mean of 177 lb and a standard deviation of 26 lb.

Mean = 177

standard deviation = 26

We find z-score using given mean and standard deviation

z = $\frac{x-mean}{standard deviation}$

= $\frac{174-177}{26}$

=-0.11538

Probability (z>-0.11538) = 1 - 0.4562 (use normal distribution table)

= 0.5438

P(weight will be greater than 174 lb) = 0.5438

8 0

3 years ago

madreJ [45]

I think #1 is -1/2 but im not sure i dont know about the other answers

4 0

3 years ago

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Can anybody help me please

Sliva [168]

Hello, your answer would be (-5, 5)

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2 years ago