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Artemon [7]
2 years ago
11

HELP 15.Solve the equation, then choose the correct answer: –4(x – 3) = –8

Mathematics
2 answers:
Dmitry_Shevchenko [17]2 years ago
8 0

Answer:

x = 5

Step-by-step explanation:

-4 ( x - 3) = -8

-4x +12 = -8

-4x = -20

x = 5

Travka [436]2 years ago
8 0
Answer:
-20

Explanation:
Distribute first
-4x + 12 = -8
Subtract 12 on both sides
-4x +12 = -8
-12 -12
-4x = -20
Divide by -4 on both sides
-4x = -20
/-4 /-4
x = 5
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Mrrafil [7]

Step-by-step explanation:

{5a}^{2}  - 30a + 45

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5(a-3)(a-3)

5(a-3)^2

{2x}^{5}  +  {x}^{4}  - 2x - 1

X^4(2x+1) - (2x+1)

(x^4-1)(2x+1)

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6 0
2 years ago
The weight for crates of apples is normally distributed with a mean weight of 34.6 pounds and a standard deviation of 2.8 pounds
Tatiana [17]

Answer:

42.22% probability that the weight is between 31 and 35 pounds

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

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

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 34.6, \sigma = 2.8

What is the probability that the weight is between 31 and 35 pounds

This is the pvalue of Z when X = 35 subtracted by the pvalue of Z when X = 31. So

X = 35

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

Z = \frac{35 - 34.6}{2.8}

Z = 0.14

Z = 0.14 has a pvalue of 0.5557

X = 31

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

Z = \frac{31 - 34.6}{2.8}

Z = -1.11

Z = -1.11 has a pvalue of 0.1335

0.5557 - 0.1335 = 0.4222

42.22% probability that the weight is between 31 and 35 pounds

6 0
2 years ago
What expression is equivalent to (9x^2 + 2x -7)(x - 4)
Dima020 [189]

Answer: C

Step-by-step explanation:

We can use the expanding rule to get that one if the expressions is

(9x^2 + 2x - 7)x + (9x^2 + 2x - 7)(-4)

3 0
2 years ago
Identify the part, whole and percent in the following statement: Find 15% of 750
erma4kov [3.2K]
You have to multiply 750*100 and then divide 75,000 with 15, which gives you 5,000
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2 years ago
A cube has a volume of 8 cubic inches. What is the length of each edge of the cube?
WITCHER [35]

Answer:

2in

Step-by-step explanation:

because 2x2x2=8

6 0
3 years ago
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