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Leno4ka [110]
1 year ago
5

For what value of x is r(x)= -21??

Mathematics
1 answer:
Naily [24]1 year ago
4 0

Answer:

Rx= - 21

Rx/r= - 21/r

X=-21/r

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Explain how the Associative Property can be used to mentally find the volume of the prisms shown
Leona [35]
<h2>Answer:</h2>

A prism is a solid object having two identical bases, hence the same cross section along the length. This is a rectangular prism its base is a rectangle. multiplying the three dimensions of a rectangular prism: length, width and height, gives us the volume of a prism:

V=L\times W\times H

Therefore, Associative Property can be used to mentally find the volume of the prisms shown by selecting the easier way of the multiplication. For instance, we can say that:

L=5cm \\ \\ W=18cm \\ \\ H=20cm

In whose case:

V=5\times 18\times 20

To operate this mentally is not an easy way, but<em> what if we rotate this shape? </em>so we say that:

L=18cm \\ \\ W=20cm \\ \\ H=5cm

Then, the volume can be found as:

V=18\times 20\times 5

There are two forms of finding the result. First, multiplying 18 by 20 and then the result by 5, but as in the previous case this is a tricky way to do mentally:

V=(18\times 20)\times 5

Hence, here we can use Associative Property multiplying 20 by 5 and then the result by 18:

V=18\times (20\times 5)

This last arrangement is easier because 20 x 5 is easy to remember given that the result is 100. Then, by multiplying this result by 18 then we get 1800.

3 0
3 years ago
If she would have left the money in the account for another 2 years before withdrawing, how much interest would the account have
Sonbull [250]

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Answer: 12% more interest

I hope this helped!

<!> Brainliest is appreciated! <!>

- Zack Slocum

*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆**☆*――*☆*――*☆*――*☆

7 0
3 years ago
Consider a circle whose equation is x2 + y2 + 4x - 6y - 36 = 0. Which statements are true? Check all that apply.
Vlada [557]

Answer:

The answer is B and C

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Please help me!! Iv been stuck!
Sloan [31]

Answer:

7

Step-by-step explanation:

Because the leftmost triangle is a 45-45-90 isosceles right triangle, a = b =\frac{7\sqrt2}{\sqrt2} = 7\\

The rightmost triangle is a 30-60-90 triangle, and the side lengths are in the proportion 1:\sqrt3:2 from shortest to longest. Therefore, c = 7\cdot\frac{\sqrt3}{1} = 7\sqrt{3} \implies \boxed{7}

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What are the domain restrictions of q^2-7q-8/q^2+3q-4
lara [203]

Answer:

the answer is d

Step-by-step explanation:



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