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photoshop1234 [79]
3 years ago
7

Test scores in a Test were normally distributed with a mean of 75 and a standard deviation of 10. Carl scored 90 in the Test . W

hat is the z-score of Carl’s test score?
Mathematics
1 answer:
mylen [45]3 years ago
6 0

Answer:

Z-score = 1.5

Step-by-step explanation:

Z-score = (x-mean)/standard deviation

= (90-75)/10

= 1.5

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The graph of a proportional relationship passes through (9, 18) and (1, y). Find y.
spayn [35]

Answer:

2

Step-by-step explanation:

Because it's a proportional relationship and it goes through the point (9, 18) the equation is y = 2x so when x = 1, y = 2.

8 0
3 years ago
During the days leading up to her piano recital, Lana practiced an average of 1 5/12 hours per day. Her total practice time was
marshall27 [118]

Answer:

<h2>8</h2>

Step-by-step explanation:

Divide 11 1/3 by 1 5/12 to find out the rough amount of days she practiced.

11.3333/1.41667 = 7.9999 or about 8

PLEASE MARK BRAINLIEST!

8 0
3 years ago
What is the simplified form?
MAVERICK [17]

Answer:

A fraction is in simplest form when the top and bottom cannot be any smaller, while still being whole numbers.

Step-by-step explanation:

6 0
3 years ago
Out of a total of 2,000 boxes, 40% were red. 50% of the red boxes were sold. a. How many red boxes were sold? Answer: _____ b. H
Natalija [7]

Answer:

400 red boxes were sold

Step-by-step explanation:

Step 1: Our output value is 2000.

Step 2: We represent the unknown value with x.

Step 3: From step 1 above,2000=100%.

Step 4: Similarly, x=40%.

Step 5: This results in a pair of simple equations:

2000=100%

x=40%(2)

Step 6: By dividing equation 1 by equation 2 and noting that both the RHS (right hand side) of both

equations have the same unit (%); we have

2000/x = 100%/40%

Step 7: Again, the reciprocal of both sides gives

x/2000 = 40%/100%

x=800

Therefore, 40% of 2000 is 800

and to find 50% just divide by 2

3 0
3 years ago
Gina read 120 pages in 4 days at this rate how many pages will she read in 5 days
77julia77 [94]

120 ÷ 4= 30 so 30 pages a day

30x4=120

30x5=150 sorry my answer was wrong before

this is correct hope it helps

6 0
3 years ago
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