Is it b
Can you answer this for me
Answer:
c = 4
Step-by-step explanation:
Let the common difference be c. Then a(n) = -3 + c(n-1). Since a(15) = 53, a(15) = -3 + (15-1)c = 53. Therefore, -3 + 14c = 53, or 14c = 56; c = 4.
Answer:
C
Step-by-step explanation:
Givens
Original cost = 29 dollars.
Discount = 40% on the second shirt.
Formula
cost after discount = (2 × list price) – (list price × discount percentage)
Solution
Cost after discount = 2 * 29 - 29*40/100
Cost after discount = 58 - 11.60
Cost after discount = 46.40
Answer: B. This student's test grade was 2.4 standard deviations above the mean test grade.
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Explanation:
The z score tells us how far away the raw score is from the mean. This distance is in terms of standard deviations.
- z = 1 means we're 1 standard deviation above the mean
- z = 2 means we're 2 standard deviations above the mean
and so on.
Negative z scores indicate the raw score is below the mean.
- z = -1 means we're 1 standard deviation below the mean
- z = -2 means we're 2 standard deviations below the mean
and so on. So that's why z = 2.4 indicates the students test grade was 2.4 standard deviations above the mean.
Answer:
14/18
Step-by-step explanation:
7/9 x 2= 14/18
7/9=14/18
but not sure what proportion means but just look up definition and yeah
I hope this was helpful!