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Alex777 [14]
2 years ago
9

Use the substitution method to solve the system of equations: y = 2x + 7; x = 9

Mathematics
1 answer:
Fiesta28 [93]2 years ago
8 0
Y=25 ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
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Pls pls pls help. This is a a math quiz.
Dmitriy789 [7]

Answer:

Step-by-step explanation:

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3 years ago
Sceenshot please answer it math problem
Inessa05 [86]
To be honest I don’t know but I just looked up diameter and I think the second one pan is right please understand I’m in sixth grade
7 0
2 years ago
Help! Please show work, and identify the solution or how many solutions there are to the system.
Sveta_85 [38]

Answer:

one solution (-3, -6)

Step-by-step explanation:

the two line cross at the point (-3, -6) and only at that one point so there is only one solution (-3, -6).

4 0
3 years ago
The scores of high school seniors on the act college entrance examination in a recent year had mean μ = 20.8 and standard devia
natka813 [3]

To solve this problem, we make use of the z statistic. The formula for z score is:

z = (x – μ) / s

where,

x = is the sample score = 21 or higher

μ = the population mean = 20.8

s = the standard deviation = 4.8

 

Solving for the z score:

z = (21 – 20.8) / 4.8

z = 0.0417

 

Next step to do is to find for the p value using the standard distribution tables at z = 0.04. Since we are looking for the probability of getting 21 or higher, therefore this is a right tailed test, hence

p = 0.516

<span>So there is about 51.6% that a student will get a score of 21 or greater.</span>

4 0
3 years ago
What is the slope of the line through (-9, 6) and (-3, 9)?<br> Choose 1 answer:
trasher [3.6K]

Given: Points (-9, 6) and (-3, 9)

Find:  The slope of the line that goes through those two points

Solution: In order to find the slope of the line that goes through the points that were provided we have to use the slope formula.  This formula subtracts the y-coordinates from each other and also the x-coordinates from each other to determine the rise/run which would give us the rate of change.

<u>Plug in the values</u>

  • m = \frac{y_2 - y_1}{x_2 - x_1}
  • m = \frac{9 - 6}{-3 - (-9)}

<u>Simplify the expression</u>

  • m = \frac{3}{-3 + 9}
  • m = \frac{3}{6}
  • m = \frac{1}{2}

Therefore, looking at the given options we can see that the best fitting one would be option A, 1/2.

4 0
2 years ago
Read 2 more answers
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