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Ksenya-84 [330]
3 years ago
14

PLEASE HELP I DON'T UNDERSTAND

Mathematics
1 answer:
OLga [1]3 years ago
6 0
X = the number of months the tire was used
y = the thickness of the tire tread

y = -(3/7)x + 20

Substitute x for 20 (the number of months the tire was used) and solve for y.

The next question: Substitute x for 49 (the number of months the tire was used) and solve for y.


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Samuel is going to invest $4,900 and leave it in an account for 14 years. Assuming the
Vladimir79 [104]

Answer:

0.054

Step-by-step explanation:

Using the compound formula A=P(1+r/n)^nt we can plug in the numbers we know. A being the total, P the initial amount, n is the number of compounds in a year, and t is the number of years passing. So 10300= 4900(1+ r/2)^2(14). We have to isolate r in order to find the rate. We can divide both sides by 4900, giving us 103/49= (1+ r/2)^28. Then we take the 28 square root from both sides. 1.02689= 1 + r/2. Subtract 1 from both sides. 0.02689= r/2. Then multiply both sides by two. r= 0.054.

3 0
3 years ago
Find the volume of the pyramid 10ft 8yd 9yd
Slav-nsk [51]
Answer= 120
Explanation= plugged it into a calculator
3 0
3 years ago
Is -(x+7)^2+4 a quadratic function?
Oliga [24]
Yes you use the method of your choice to solve (x+7)*(x+7)
Then you distribute the negative -1(x^2+14x+49)
Then you add the four
-x^2-14x-45 should be your answer
5 0
3 years ago
I'm really confused on this one please answer !!!!!!!
Sedbober [7]
The formula for finding the area of a rug: A = s^2

Plugging in the values we know, we can solve for s.

79 = s^2

Take the square root of both sides.

\sqrt{79} = s

\sqrt{79} is approximately equal to 8.89

So, 8.89 feet is the answer.
4 0
3 years ago
2. Find the product of each of the following:
Kruka [31]

Step-by-step explanation:

i) \:  \frac{3}{5}  \times (   \frac{ - 7}{8} ) =  -  \frac{21}{40}  \\  \\ ii) \:  \frac{ - 9}{2}  \times  \frac{5}{4}  =   - \frac{45}{8}  \\  \\ iii) \:  \frac{ - 6}{11}  \times  \frac{5}{3}  =  -  \frac{10}{11}  \\  \\ iv) \:  \frac{ - 2}{3}   \times  \frac{6}{7}  =  -  \frac{4}{7}  \\

6 0
3 years ago
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