Summative HS Mathematics Weekly Standards Review (# 17)

Name ______Date ______Per. ____
1. If i2 = –1, Evaluate:

(A) –200i (B) 200i
(C) –200 (D) 200 / 2. Which of the following is a property of parallelograms?
(A) Opposite Ðs are supplementary.
(B) Diagonals are perpendicular.
(C) Consecutive Ðs are supplementary.
(D) Consecutive sides are ^. / / 4. Solve:

5. Find the variance of the following set of data:

To calculate the variance of a data set, follow these steps:
a)  Find the mean of the data by calculating the sum of the data and dividing the sum by the number of numbers in the data.
b)  One at a time, subtract each number in the data set from the mean and square the difference.
c)  Add the results from the above step and divide this sum by the number of numbers in the data set. This is the variance. / 6. Find the standard deviation of the following set of data:

To calculate the standard deviation of a data set, follow these steps:
a) Find the variance of the data. (See left)
b) Take the square root of the variance. This is the standard deviation.
7. Find the rule for the composition,, given:

/ 8. Vicki is a vendor at Angel Stadium. She walks around the stadium selling peanuts for $4.00 and Cracker Jacks for $3.50. At the end of her shift she sold a total of 38 items and took in $143.00. How many peanuts and how many Cracker Jacks did she sell during her shift?
9. Find the x-intercepts and vertex of the parabola described by the following quadratic function:
/ 10. Which function is the inverse of the function ?

Answers to Worksheet 17:
1. / (A) –200i
2. / (C) Consecutive Ðs are supplementary.
3. /
4. /
5. /
6. /
7. /
8. / 20 Peanuts and 18 Cracker Jacks.
9. /
10. /