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3 years ago

Need help on this. thank you

Mathematics

1 answer:

Leno4ka [110]3 years ago

5 0

Answer:

x²

Step-by-step explanation:

Let "d" represent the divisor (what goes in the blank). Then you have ...

... (x²y)/d = y

Multiplying by d gives ...

... x²y = yd

And dividing by y gives the desired value:

... x² = d

The divisor is x².

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Help please and thanks! I'll award brainliest if you show your work as well :)

iren2701 [21]

Answer:

6 inches

Step-by-step explanation:

Formula for surface area of a cylinder:

$SA=2\pi r^{2} +2\pi rh$

Plug in values and solve for the radius:

$180\pi =2\pi r^{2} +2\pi r(9)\\$

Divide both sides by $2\pi$

$90=r^{2} +r(9)$

Subtract 90 from both sides

$0=r^{2} +9r-90$

Use the quadratic equation to find the roots

$x=(-b$ ± $\sqrt{b^2-4ac})*\frac{1}{2a}$ (sorry for formatting, Brainly doesn't

allow equations with ± in them)

$x=\frac{-9+\sqrt{9^2-4*1*90} }{2(1)}$ and $x=\frac{-9-\sqrt{9^2-4*1*90} }{2(1)}$

$x=\frac{(-9+\sqrt{81+360})}{2}$ and $x=\frac{(-9-\sqrt{81+360})}{2}$

$x=\frac{(-9+\sqrt{441})}{2}$ and $x=\frac{(-9-\sqrt{441})}{2}$

$x=\frac{(-9+21)}{2}$ and $x=\frac{(-9-21)}{2}$

$x=\frac{12}{2}$ and $x=\frac{-30}{2}$

$x=6$ and $x=-15$

We can't have a negative radius, so that leaves us with r=6 in.

8 0

2 years ago

Help plz i dont undertand

lora16 [44]

Answers:

x = 4
AB = 36
BC = 36
AC = 36

All three sides are 36 units long.

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

Explanation:

Triangle ABC is equilateral, so all three sides are the same length.

Pick any two of those sides, set them equal to each other, and solve for x

AB = BC

8x+4 = 11x-8

8x-11x = -8-4

-3x = -12

x = -12/(-3)

x = 4

Use this x value to find each side. We should get the same value (if not, then an error occurred in solving for x).

AB = 8x+4 = 8*4+4 = 32+4 = 36
BC = 11x-8 = 11*4-8 = 44-8 = 36
AC = 9x = 9*4 = 36

We get the same value for the three side lengths, so this confirms we have the correct x value.

7 0

3 years ago

A stop sign is in the shape of a regular octagon. A regular octagon can be created using eight triangles of equal area. One tria

Alex_Xolod [135]

Answer: the answer is B.) 1080 sq in

Step-by-step explanation: edge 2021 i took the test

5 0

3 years ago

PLEASE HELP BOTS HAVE BEEN COMMENTING ON MY POSTS ALL DAY I NEED AN REAL ANSWER PLEASE IM DEPERATE

allochka39001 [22]

Yep the same thing happens to me

8 0

3 years ago

James drives 585 miles from Raleigh to Cleveland Ohio on Friday and back on Sunday.If the trip takes him 18 hours total how many

creativ13 [48]

if Raleigh to Cleveland = 585 miles then Cleveland to Raleigh = 585 miles

585 miles + 585 miles = 1170 miles

1170 miles / 18 hours = 65 miles / hour

James drove 65 miles per hour.

4 0

3 years ago