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kipiarov [429]
3 years ago
9

Add the polynomials: (-5 - 7x^2); (5 + 7x^3) *

Mathematics
1 answer:
cestrela7 [59]3 years ago
3 0

Answer:

- 7 {x}^{2}  + 7 {x}^{3}

Step-by-step explanation:

( - 5 - 7 {x}^{2} ) + (5 + 7 {x}^{3} ) \\  =  - 5 - 7 {x}^{2}  + 5 + 7 {x}^{3}  \\  = - 7 {x}^{2}  + 7 {x}^{3}

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The area of a playground is 320 yards squared. The width of the playground is 4 yards longer than its length. Find the perimeter
Naddik [55]
The formula to find the perimeter of a rectangle is P = 2(l + w), where p is perimeter, l is length and w is width,

The length of the playground is 16 yards, and the width is 20, because 16 x 20 = 320 and 16 + 4 = 20.

P = 2(l + w)
P = 2(16 + 20)
P = 2(36)
P = 72.

The perimeter is 72 yards.

Hope this helps!!
5 0
3 years ago
32. Solve for h. bh-u+g=w
ad-work [718]

Answer:

h = \frac{w+u-g}{b}

Step-by-step explanation:

bh-u+g=w                       original

bh= w+u-g                      move everything that does not have an h to other side

h = \frac{w+u-g}{b}                        divide off b

4 0
4 years ago
Pllllleasee helpddddddddddddddddd
Dimas [21]

Answer:

A

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
How do you work this out
Digiron [165]
Check the picture below.

notice, is just a circle inscribed in a square.

now for the first one, we know the diameter is 14, so the square is a 14x14, and the radius of that is half the diameter or 7.

now, if we get the area of the square, which includes the area of the circle, and THEN get the area of the circle and subtract it from the square's, what's leftover is the shaded section.

\bf \textit{area of a circle}\\\\ A=\pi r^2\\\\
-------------------------------\\\\
\stackrel{\textit{square's area}}{14\cdot 14}~-~\stackrel{\textit{circle's area}}{\pi 7^2}\implies 196-49\pi

now, for the one on the right-hand-side, the radius is 8, and square's area is 16x16,

\bf \stackrel{\textit{square's area}}{16\cdot 16}~-~\stackrel{\textit{circle's area}}{\pi 8^2}\implies 256-64\pi

5 0
4 years ago
A runner did the 100 meter dash in 9.9 seconds and the 100 yard dash in the same amount of time . In which race did he run the f
RideAnS [48]
He ran the fastest in the second run
4 0
3 years ago
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