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polet [3.4K]
3 years ago
14

-4r + 18=-2 whats r ?

Mathematics
2 answers:
maw [93]3 years ago
8 0

Answer:

r=5

Step-by-step explanation:

1)

-4r+18=-2 Subtract 18 from both sides

-18 -18

2)

-4r=-20

---- ---- Divide both sides by -4

-4r -4r

3)

r=5 -20/-4 ----------> 5

Otrada [13]3 years ago
3 0

Answer:

r=5

Step-by-step explanation:

Can i get brainlest

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The total length of wires A,B and C is 445cm. Wire A is 45cm longer then wire B,and wire B is half as long as wire C. How long i
dolphi86 [110]

Answer:

A = 145cm

Step-by-step explanation:

A+B+C = 445cm  

b = 1/2c

a = b+45  =  1/2c + 45

445 = c + (0.5c) + (0.5c + 45)

445 = 2c + 45

445 - 45 = 2c

400/2 = c

c = 200cm

a = 1/2c + 45 = 1/2*200 + 45 = 100 + 45 = 145cm

5 0
3 years ago
The height of a soccer ball that is kicked from the ground can be approximated by the function:
igomit [66]

Answer:

The answer to your question is 2 seconds

Step-by-step explanation:

Data

function   y = -14x² + 56x

maximum height = ?

Process

1.- Find the derivative of the function

                y' = -28x + 56

2.- Equal to zero the result

                      -28x + 56 = 0

3.- Solve for x

                      -28x = - 56

                            x = -56/-28

                            x = 2

4.- Conclusion

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6 0
4 years ago
Read 2 more answers
What is (4+2) (-5) +3 (2+ -3 + 2
Mariulka [41]
<span><span><span>(<span>4+2</span>)</span><span>(<span>−5</span>)</span></span>+<span>3<span>(<span><span>2−3</span>+2</span>)
</span></span></span><span>=<span><span><span>(6)</span><span>(<span>−5</span>)</span></span>+<span>3<span>(<span><span>2−3</span>+2</span>)
</span></span></span></span><span>=<span><span>−30</span>+<span>3<span>(<span><span>2−3</span>+2</span>)
</span></span></span></span><span>=<span><span>−30</span>+<span>3<span>(<span><span>−1</span>+2</span>)
</span></span></span></span><span>=<span><span>−30</span>+<span><span>(3)</span><span>(1)
</span></span></span></span><span>=<span><span>−30</span>+3
</span></span><span>=<span>−<span>27</span></span></span><span>
Hope this helps</span>
5 0
3 years ago
Read 2 more answers
An amount of $35,000 is borrowed for 9 years at 3.5% interest, compounded annually. If the loan is paid in full at the end of th
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<span>In 9 years, you will have $47,701.41 paid.</span>
8 0
3 years ago
You invest 1300 in a bank with an interest rate of 8.5% how much money will you have in 12 years ?
densk [106]

Answer:

3460

Step-by-step explanation:

Lots and lots and lots and lots of math. :p

Basically just add 8.5% to each number 12 times

5 0
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