2 years ago

Find two numbers . A and B , that have the product of 12 and the sum of 7

Mathematics

1 answer:

steposvetlana [31]2 years ago

3 0

Answer: XY = 12. X + Y = -7.

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375 A system of equations is shown below.

jolli1 [7]

B is the one I would go with, multiplying everything by 3 in the equation 3 would eliminate y.

8 0

2 years ago

Marta hopes to have a test average of at least 90 by the end of the marking period. Her grades on the first four tests have been

Virty [35]

Answer:

Marta need to score at least 94 to receive an average of 90 or higher considering all five tests.

Explanation:

Marks received by Marta in four tests = 86, 84, 97 and 89

Let mark received in fifth test be x

We have average of five test is more than or equal to 90

So we have

$\frac{86+84+97+89+x}{5} \geq 90\\ \\ 86+84+97+89+x\geq 450\\ \\ x\geq 94$

So Marta need to score at least 94 to receive an average of 90 or higher considering all five tests.

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2 years ago

Pick out the prime numbers from the following numbers<br>16. 13. 19.27.54.51.2, 73. 87.89

Marrrta [24]

Answer:

13, 19, 73, 89

Step-by-step explanation:

Prime numbers only have two factors, 1 and itself.

6 0

3 years ago

Read 2 more answers

Need help on 11,12,13,14,15

const2013 [10]

Not sure what 14 is asking?

15 would be 16.

The square root of width squared plus length squared equals the diagonal.

So if you just change the order of the equation you can find the length.

Double check it by doing it both ways to see if your answer is right.

7 0

2 years ago

Find the slope of the line passing through the points D (10, 8) and E (-4,4)

RUDIKE [14]

Answer:

Slope=2/7

Step-by-step explanation:

Slope=rise/run

$rise = 8 - 4 = 4 \\ run = 10 - ( - 4) = 14 \\ slope = \frac{4}{14} = \frac{2}{7}$

8 0

2 years ago