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Verizon [17]
3 years ago
10

the number off standard deviations between a score and the mean score indicated by a z-score. what was Cindy's z-score on the sc

ience test
Mathematics
1 answer:
aalyn [17]3 years ago
5 0
Z score of 0 gives you the mean for the problem;  The mean μ is 70 Now you can use this value of the mean in the definition of z score for the second case and find the standard deviation. Z score is the number of standard deviations away from the mean.  Therefore σ = (1)(74-70) = 4.
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Solve for x. -2(16 - 4x) - 8 = 6(x + 2)
Amanda [17]
So...

-2(16-4x)-8=6(x+2)             Multiply
-32+8x-8=6x+12                 Add like terms
-40+8x=6x+12                    Subtract 6x from both sides
-40+2x=12                          Add 40 to both sides
2x=52                                 Divide 2 from both sides
x=26                                   Substitute to check
-2(16-4(26))-8=6((26)+2)   Add and multiply in parenthesis
-2(-88)-8=6(28)                  Multiply
176-8=168                         Subtract
168=168                          

So x=26

I hope this helps! Have a great day!
6 0
4 years ago
How many degrees in each side of an equilateral polygon with 6 sides?
9966 [12]
If the total is 360 degrees then it will take 50 degrees each side. If the total is 180 degrees it would be 30 degrees each side
8 0
3 years ago
I can’t figure this out! I need help
Sophie [7]
Split them into triangles and rectangles. 

15 x 9 = 135
(6 x 3) / 2 = 9
135 - 9 = 126

This gives you the area of the rectangle with the triangle taken out of it.

15 - 6 = 9
(9 x 6) / 2 = 27

This gives you the area of the triangle at the top.

Add these together: 27 + 126 = 153, and that's your answer!

Hope I helped x
6 0
4 years ago
A triangle can be right angled and scalene. true or false
Korolek [52]
False, because a right angled triangle has two congruent sides since it is 90 degrees and the definition of a scalene triangle: (has no congruent sides) makes it not possible.
7 0
3 years ago
PLZ HURRY ONLY HAVE A FEW MINUTES LEFT There are 4 cups in a row from left to right. The green cup is somewhere between the yell
Artist 52 [7]

Answer:

  • 4 arrangements

Step-by-step explanation:

Let the cups be

  • G = green, B = blue, Y = yellow, R = red

Green is between yellow and blue and red is to left of yellow

Option 1, yellow is to left of green

  • R-Y-G-B

Option 2, blue is to left of green

  • B-G-R-Y

or

  • R-B-G-Y

or

  • B-G-R-Y
3 0
3 years ago
Read 2 more answers
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