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Colt1911 [192]
2 years ago
12

What is the solution of the system? Use substitution. x - y = -6 6x - 3y = -9

Mathematics
1 answer:
elena-14-01-66 [18.8K]2 years ago
3 0

Answer:1.5,-1.5

Step-by-step explanation:

I just answered it

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In which of the following units is acceleration expressed? A. Newtons B. Kilograms C. Foot-pounds D. Meters per second squared
ELEN [110]

Answer:

D. Meters per second

Step-by-step explanation:

here's  why the answer is D even though they arent the best explanations but none the less the answer is still right.

1. Newton = force

2.kilo = mass

3. foot-pound = force

4. Meters Per sec = speed/acceleration

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3 years ago
Write a verbal sentence to represent 5x+7=18
Romashka-Z-Leto [24]
Five times x plus seven equals eighteen 
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Each exterior angle of a regular polygon is 24º.<br>How many sides does the polygon have?​
valina [46]

Answer: 360 / 24 = 15

Step-by-step explanation :

Since the sum of the exterior angles is always 360 degrees, if you divide 360 degrees by 24 degrees you get 15 which is the number of equal exterior angles and therefore 15 vertices and sides to the polygon.

5 0
3 years ago
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A two story house is about 12 blank tall
zlopas [31]
I believe the answer is feet
4 0
3 years ago
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Suppose that IQ scores have a bell-shaped distribution with a mean of 104 and a standard deviation of 17. Using the empirical ru
Shalnov [3]

Answer:

By the Empirical Rule, 68% of IQ scores are between 87 and 121

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean = 104

Standard deviation = 17

Using the empirical rule, what percentage of IQ scores are between 87 and 121

87 = 104 - 1*17

So 87 is one standard deviation below the mean

121 = 104 + 1*17

So 121 is one standard deviation above the mean

By the Empirical Rule, 68% of IQ scores are between 87 and 121

4 0
3 years ago
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