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9966 [12]
3 years ago
12

What is the surface area of a cube with a side of length 14 meters?

Mathematics
2 answers:
Yanka [14]3 years ago
8 0
Area of a cube=6(side)²
area of a cube=6*(14 m)²=6*196 m²=1176 m²

Answer: 1176 m²
Cerrena [4.2K]3 years ago
4 0
Best Answer 1176m²

 SA = 6 × (14)²
 SA = 6 × 14×14
SA = 6×14
SA= 84²
 which would give you 1176m²

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What is the equation of a line that is perpendicular to the line that is given by the equation y = 2?
Novay_Z [31]
First, put the equation of the line giveninto slope-intercept form by solving fory. You get y = 2x +5, so the slope is –2.Perpendicular lines have opposite-reciprocal slopes, so the slope of theline we want to find is 1/2. answer y=-1/2
6 0
2 years ago
If<br> 3x+y = 7, what is the value of x/y?<br> SOMEONE HELP I NEED IT QUICK!! plsss
andrey2020 [161]

Answer:

x=2 y=1

Step-by-step explanation:

3 times 2 =6

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8 0
3 years ago
I’m Really lost if I could get a answer it would be greatly appreciated
Nataly [62]
<h3>Answers:</h3>

f(g(x)) = \sqrt{x^2+5}+5\\\\g(f(x)) = x+30+10\sqrt{x-1}

================================================

Work Shown:

Part 1

f(x) = \sqrt{x-1}+5\\\\f(g(x)) = \sqrt{g(x)-1}+5\\\\f(g(x)) = \sqrt{x^2+6-1}+5\\\\f(g(x)) = \sqrt{x^2+5}+5\\\\

Notice how I replaced every x with g(x) in step 2. Then I plugged in g(x) = x^2+6 and simplified.

------------------

Part 2

g(x) = x^2+6\\\\g(f(x)) = \left(f(x)\right)^2+6\\\\g(f(x)) = \left(\sqrt{x-1}+5\right)^2+6\\\\g(f(x)) = \left(\sqrt{x-1}\right)^2+2*5*\sqrt{x-1}+\left(5\right)^2+6\\\\g(f(x)) = x-1+10\sqrt{x-1}+25+6\\\\g(f(x)) = x+30+10\sqrt{x-1}\\\\

In step 4, I used the rule (a+b)^2 = a^2+2ab+b^2

In this case, a = sqrt(x-1) and b = 5.

You could also use the box method as a visual way to expand out \left(\sqrt{x-1}+5\right)^2

6 0
3 years ago
Another stack of books is 43 inches tall. Each book is 1/2 inch thick. Write an expression that represents the number of books i
enyata [817]

Answer:

86 books

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A stack of books is 43 inches tall.

Each book is \frac{1}{2} inch thick.

To find the number of books in tha stack, divide the height of the stack by the height of the book:

43:\dfrac{1}{2}

The division by the fraction \frac{1}{2} is equivalent to the multiplication by the fraction \frac{2}{1}, so

43:\dfrac{1}{2}=43\cdot \dfrac{2}{1}=43\cdot 2=86

5 0
3 years ago
70/6 in a mixed number
Arada [10]
6 can go into 70 11 times without having a remainder so the 11 goes on the outside as your whole number. Then you have 4 left over to get to 70 so 4 becomes your numerator. The 6 stays as your denominator. So you have

11 \frac{4}{6}
3 0
3 years ago
Read 2 more answers
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