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Arlecino [84]
3 years ago
5

Twice the difference of a number and 7 equals 5

Mathematics
1 answer:
RideAnS [48]3 years ago
4 0

Hey there!

Let's write an equation given this information. We will use x to represent the number.

2(x-7)=5

Now, we use the distributive property to remove the parentheses.

2x-14=5

Now, we add 14 to both sides.

2x=19

We divide both sides by 2.

x=9.5

Therefore, our number is 9.5

I hope this helps!

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How can I solve this?!
Nutka1998 [239]

A

evaluate f(5) and f(2)

f(5) = 5m + b and f(2) = 2m + b, hence

f(5) - f(2) = 5m + b - 2m - b = 3m

the expression simplifies to

\frac{3m}{3} = 2 ( cross- multiply )

3m = 6 ( divide both sides by 3 )

m = 2 → A




8 0
3 years ago
Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 68 miles per​ hour, with a standard
Vladimir79 [104]

About 99.7% of vehicles whose speeds are between 59 miles per hour and 77 miles per hour.

Empirical rule states that for a normal distribution, 68% lie within one standard deviations, 95% lie within two standard deviations, and 99.7% lie within three standard deviations of the mean.

Given that mean (μ) = 68 miles per hour, standard deviation (σ) = 3 miles per hour.

68% lie within one standard deviation = (μ ± σ) = (68 ± 3) = (65, 71).

Hence 68% of the vehicle speed is between 65 miles per hour and 71 miles per hour.

95% lie within two standard deviation = (μ ± 2σ) = (68 ± 2*3) = (62, 74).

Hence 95% of the vehicle speed is between 62 miles per hour and 74 miles per hour.

99.7% lie within three standard deviation = (μ ± 3σ) = (68 ± 3*3) = (59, 77).

Hence 99.7% of the vehicle speed is between 59 miles per hour and 77 miles per hour.

Find out more at: brainly.com/question/14468516

3 0
3 years ago
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The difference of a number N and 9 is fewer than 4
denis23 [38]
Any number less than or equal to 12
5 0
3 years ago
19. Write an algebraic expression for the phrase: 6 more than the product of 8 and n.
Sveta_85 [38]
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6 0
3 years ago
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Please Help me Its a math problem see image attached
SSSSS [86.1K]

Answer:

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Step-by-step explanation:

Average rate of change within an interval is the slope of the endpoints.

The endpoints are:

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The slope is

  • (3 - 6)/(0 - (-1)) = - 3/1 = - 3

Correct choice is C

4 0
2 years ago
Read 2 more answers
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