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mario62 [17]
3 years ago
7

Sally took her stats test last week and scored a 45%. The class average was 55%with a standard deviation of 4.5. How many standa

rd deviations below the mean did Sally score? (Hint: z-score
)A) 3.33 SD above the mean
B) 2.22 SD below the mean
C) 2.22 SD above the mean
D) 3.33 SD below the mean
Mathematics
1 answer:
sesenic [268]3 years ago
5 0

Answer: A

Step-by-step explanation:

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Jamie receives 15% commission on magazine subscriptions. One week her sales totaled $860. What was her commission?
icang [17]

Given:

Jamie receives 15% commission on magazine subscriptions.

One week her sales totaled $860.

To find:

Her commission.

Solution:

We have,

Total sales of one week = $860

Rate of commission = 15%

Now,

Commission=\dfrac{15}{100}\times 860

Commission=\dfrac{15}{10}\times 86

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3 years ago
What is 1 1/2 multiplied by 2 as a mixed number or fraction
Andrew [12]

Answer:

3

Step-by-step explanation:

1 1/2 can be rewritten as 3/2, so 3/2*2=3.

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3 years ago
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The reciprocal of 1/8
Volgvan

Hey there!

Another name for "reciprocal" is inverse

1/8 reciprocal is 8/1

Answer: 8/1

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7 0
4 years ago
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PLEASE HELP, WILL GIVE BRAINLIEST IF CORRECT!!!! (08.06 MC) Mike and his friends bought cheese wafers for $2 per packet and choc
maks197457 [2]

Answer:

x = 5 , y = 15

Step-by-step explanation:

You can solve this using substitution.

Let the quantity of cheese wafers be denoted by x and the quantity of chocolate wafers denoted by y

2x + 1y = 25

x + y = 20

These two equations are the answer to part A, (remember to include the above prompt which says what x and y denote).

For part B I used substitution because it was more applicable to the question then addition or elimination.

ACTUAL WORK

Set 2x + 1y = 25 equal to x

x = 25 - y / 2

Replace x with y in the second equation

(25 - y / 2) + y = 20

And solve for y

y = 15

Since we know what y is we can replace y in the second equation and find what x is

x + 15 = 20

Solve for x

x = 5

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3 years ago
(Edge comparing data sets quiz) what can be made between the two sets of data in the table?​
telo118 [61]

Answer: The 1st one I think.

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3 years ago
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