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Firlakuza [10]
3 years ago
6

14. 2^2+ + 5x = 5x + 50

Mathematics
1 answer:
postnew [5]3 years ago
8 0

Answer:

<h3>           x = -5   ∨   x = 5    </h3>

Step-by-step explanation:

\bold{2x^2 + 5x= 5x +50}\\\\{}\ \ -5x\qquad -5x\\\\\bold{2x^2\ =\ 50}\\\\\div2\quad\ \ \div2\\\\\bold{x^2=25}\\\\\bold{x=5\quad\vee\quad x=-5}

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Item 16 A sphere has a radius of 8 centimeters. A second sphere has a radius of 2 centimeters. What is the difference of the vol
Zigmanuir [339]

Answer:

672\pi \text{ cm}^3.

Step-by-step explanation:

We have been given that a sphere has a radius of 8 centimeters. A second sphere has a radius of 2 centimeters. We are asked to find the difference of the volumes of the spheres.      

We will use volume formula of sphere to solve our given problem.

\text{Volume of sphere}=\frac{4}{3}\pi r^3, where r is radius of sphere.

The difference of volumes would be volume of larger sphere minus volume of smaller sphere.

\text{Difference of volumes}=\frac{4}{3}\pi(\text{8 cm})^3-\frac{4}{3}\pi(\text{2 cm})^3

\text{Difference of volumes}=\frac{4}{3}\pi(512)\text{ cm}^3-\frac{4}{3}\pi(8)\text{ cm}^3

\text{Difference of volumes}=\frac{4}{3}\pi(512-8)\text{ cm}^3

\text{Difference of volumes}=4\pi(168)\text{ cm}^3

\text{Difference of volumes}=672\pi\text{ cm}^3

Therefore, the difference between volumes of the spheres is 672\pi \text{ cm}^3.

3 0
3 years ago
During April it was recorded that there were 19 days when it rained, mostly cloudy on 6 days and sunny on 5 days inference in th
Anika [276]

Answer:

I would defend this

Step-by-step explanation:

This makes sense because April is the rainiest month of the year. It's even shown in the say that April showers bring May flowers.

5 0
2 years ago
In january of one winter, 3/10 of a wood pile was used in a wood stove. In February, 2/5 of the wood pile was used. What part of
arsen [322]
2/5 is equivalent to 4/10 so at the end of February 4/10 was used up
And at the end of January, 3/10 was used
so 4/10 + 3/10 = 7/10

At the end of February, 7/10 of the wood was used
6 0
3 years ago
Find x and y in <br>2x+2y=12<br>4x_4y=13
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For the first one the answer is y=-1x+6 which means x=-1 and y=6
6 0
3 years ago
Read 2 more answers
The length of a rectangle is five times it’s with if the perimeter of the rectangle is 84 m find its length and width
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L = 2.049 w = 4.099 picture explains why

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3 years ago
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