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iris [78.8K]
3 years ago
9

Solve the equation 10r – 2 = 28 for r.

Mathematics
1 answer:
gulaghasi [49]3 years ago
7 0

Answer:

r=3

Step-by-step explanation:

First we add 2 to both sides.

That leaves us with 10r=30

Then we can divide both sides by 10

r=3

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if gabby wants to make a regular octagon with a side length of 20 inches of water , how much wire does she need?
EleoNora [17]

Answer:

160 inches

Step-by-step explanation:

An octagon has 8 sides;

20*8=160

4 0
3 years ago
Find the area of the triangle. Figure is not drawn to scale. Show your work. (Image attached)
Zolol [24]

Answer: 13.8cm^2

Step-by-step explanation:

The area of a triangle can be calculated with the formula:

A_{(triangle)}=\frac{b*h}{2}

The base of the triangle is "b" and the height of the triangle is "h",

In the figure you can observe that the base and the height of the triangle are:

b=6.9cm\\h=4cm

Knowing these values, you can substitute them into A_{(triangle)}=\frac{b*h}{2}.

Therefore, the area of the triangle is:

A_{(triangle)}=\frac{(6.9cm)(4cm)}{2}

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4 0
3 years ago
PLSSSS HALLPP!!! DUE TODAY!!! PLS AND THANK YOU!!
3241004551 [841]

Answer:

$100.4

Step-by-step explanation:

Compound Interest Formula:

A = P(1 + \frac{r}{100})^{t}

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7 0
3 years ago
X^4 -(3m+2)x^2 +3m+1 +0 <br> tìm m để phương trình có 4 nghiệm phân biệt nhỏ hơn 2
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Answer:

3

4

4

3

4

4

3

5

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4848

Step-by-step explanation:

hope I helped

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Okay, so we multiply..

And we know that a week = 7 days..

So..

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We change the 2 into 2/1
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Then we change the 7 into 1/7.. ( Which is still a whole )

Then multiply again..

4/3 * 1/7 = 4/21

You can correct me if I'm wrong...
I hope this helps you!
7 0
3 years ago
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