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Lubov Fominskaja [6]
2 years ago
6

Solve for z. 7z +4 – 9z = 8 z = [?]

Mathematics
2 answers:
ZanzabumX [31]2 years ago
7 0

Answer:

Z = -2

Step-by-step explanation:

Alecsey [184]2 years ago
3 0

Answer:

z = -2 Hope that helps !

Step-by-step explanation:

1.  Simplify 7z+4-9= -2z+4=8

2. Subtract 4 from both sides -2z=8-4

3. Simplify 8-4=4 -2z=4

4. Divide both sides by -2 z= -4/2 = -2

so, that your answer z= -2 Make me brainliest

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Random samples of size 64 are taken from an infinite population whose mean and standard deviation are 24 and 6.4, respectively.
umka2103 [35]

Answer:

Mean 24, standard error 0.8

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a random variable X, with mean \mu and standard deviation \sigma, the sample means with size n of at least 30 can be approximated to a normal distribution with mean \mu and standard deviation, also called standard error s = \frac{\sigma}{\sqrt{n}}

In this problem, we have that:

\mu = 24, \sigma = 6.4, n = 64

What are the mean and the standard error of the sample mean?

By the Central Limit Theorem, mean 24 and standard error s = \frac{6.4}{\sqrt{64}} = 0.8

7 0
2 years ago
NEED HELP FAST PLEASE ANWSER
Tju [1.3M]

Answer:

2=-8-x

10=-x

hope it helps you to please mark me brainliest

6 0
2 years ago
I’m a little lost on this
jeyben [28]
Do you have any options?
4 0
3 years ago
Clarice graphed the amount of money in her savings account during the past six months on the line graph.
Galina-37 [17]

Answer:

Month 4 and 5

Step-by-step explanation:

This graph shows a very big increase in the change of the amt of money from 50 to 90 which is a 40 difference

5 0
3 years ago
Read 2 more answers
Moises is determining the solution to the system of equations that is show below. Equation representing line A: mc018-1.jpg Poin
dimulka [17.4K]
Answer:
equation of line is:
y = -2x - 6

Explanation:
The general form of the line is:
y = mx + c
where:
m is the slope of the line
c is the y-intercept

(a) getting the slope of the line:
slope of the line is calculated using the following rule:
slope of line (m) = (y2-y1) / (x2-x1) = (-24--12) / (9-3) = -2
The equation now becomes:
y = -2x + c

(b) getting the y-intercept:
The two given points belong to the line. Therefore, to get the y-intercept, we will use one of the points and substitute in the equation and solve for c.
I will use the point (3,-12)
y = mx + c
-12 = -2(3) + c
-12 = -6 + c
c = -12 + 6
c = -6

Based on the above, the equation of the line is:
y = -2x - 6

Hope this helps :)
6 0
3 years ago
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