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Elodia [21]
2 years ago
9

Evaluate the expression 4(x - 3) + 7 using x=2

Mathematics
2 answers:
Maru [420]2 years ago
6 0
4x - 12 + 7
4x - 5
4(2) - 5
8 - 5
the answer is 3
In-s [12.5K]2 years ago
6 0

Answer:

3

Step-by-step explanation:

Parentheses Exponents Multiplication Division Addition Subtraction

x=2 4(2-3)+7

P: (2-3)=-1

E:

M: 4(-1)=-4

D:

A: -4+7= 3

S:

4(2-3)+7=3

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The rental rate for a power washer has a one time fee of $60 plus $20 for each day of the rental. The graph shows the points rep
Kamila [148]

I think it’s

Y=25x+50

Hope this helps

7 0
2 years ago
If 5% of all vehicles travel less than 39.15 m/h and 10% travel more than 73.23 m/h, what are the mean and standard deviation of
Fantom [35]

Answer:

Standard deviation = 11.30 m/h

Mean = 57.74 m/h

Step-by-step explanation:

Assume that the travel speed is normally distributed.

The corresponding z-score to the 5th and 90th percentile of normal distribution are, respectively, -1.645 and 1.282.

For any given speed X, the z-score is:

z= \frac{X-\mu}{\sigma}

If z = -1.645 for X = 39.15 and z= 1.282 for X=72.23, the following system can be solved for the mean and standard deviation of vehicle speed:

-1.645= \frac{39.15-\mu}{\sigma}\\1.282= \frac{72.23-\mu}{\sigma}\\\\-1.645 -1.282 = \frac{39.15-72.23}{\sigma} \\\sigma=11.30\ m/h\\\mu =72.23-(1.282*\sigma)\\\mu=57.74\ m/h

The standard deviation is 11.30 m/h and the mean is 57.74 m/h.

3 0
3 years ago
The table represents a linear function.
OverLord2011 [107]

Answer:

-4

Step-by-step explanation:

Consider (-4, -2) and (-2, -10).

Change in x: 2

Change in y: -8

Slope = (change in y)/(change in x) = -4

3 0
2 years ago
What 7a=56 and what's the answers
WINSTONCH [101]
A=8 because you divide 56 by 7
7 0
2 years ago
Read 2 more answers
Sorry im kinda dumb
grandymaker [24]

Answer:

D is your answer.

Step-by-step explanation:

Surface area is equal to all faces on the prism.

If you simplify it:

(5)(12) + (5)(10) + (12)(10) + (13)(10)

SA = 360 cm^2

Feel free to let me know if you need more help. :)

Also, you're not dumb. Everyone needs help at some point. :)

5 0
3 years ago
Read 2 more answers
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