4 years ago

The average house in a neighborhood measures 55 ft by 35 ft by 20 ft tall. What is the total outside surface area?

1 answer:

3 0

$\bf \textit{surface area of a rectangular prism}\\\\ SA=2(Lh+Lw+wh)~~ \begin{cases} L=length\\ w=width\\ h=height\\ \cline{1-1} L=55\\ w=35\\ h=20 \end{cases} \\\\\\ SA=2[(55\cdot 20)+(55\cdot 35)+(35\cdot 20)]\implies SA=2[1100+1925+700] \\\\\\ SA=2(3725)\implies SA=7450$

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soldi70 [24.7K]

Answer:

-9

Step-by-step explanation:

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8 0

2 years ago

Rewrite y = -(x + 2)2 – 5 in standard form.

xenn [34]

Answer:

y = - x² - 4x - 9

Step-by-step explanation:

Given

y = - (x + 2)² - 5 ← expand (x + 2)² using FOIL

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= - x² - 4x - 4 - 5 ← collect like terms

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3 years ago

Four brothers and their sister have the average age 7. Four brothers have the average age 6. How old is the sister?

AnnyKZ [126]

Answer:

11 years old

Step-by-step explanation:

If four brothers have the average age 6, then the sum of their ages is

$4\cdot 6=24$

years.

Let x years be the age of sister. If four brothers and their sister have the average age 7, then

$\dfrac{24+x}{5}=7.$

Multiply this equation by 5:

$24+x=35\Rightarrow x=35-24=11.$

The sister is 11 years old.

4 0

4 years ago

Gcf of 56f^3 g^2 and 70fg^3

yulyashka [42]

<span>56f^3 g^2 = 7fg^2(8f^2)
and
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</span>Gcf of 56f^3 g^2 and 70fg^3 = 7fg^2

7 0

3 years ago

I need help with this stupid question, my teacher got me confused when he kept talking about different things!

Art [367]

Answer:

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Step-by-step explanation:

1 3/4 + 7/8

add the fractions together

look for the lcm bwt 4 and 8

1 6 + 7

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= 13/8 = 1 5/8

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6 0

3 years ago