The mean of a set of four test scores is 79. If three test scores are 77, 79, and 85, what is the fourth test score?

a. 83

b. 81

c. 79

d. 75

Nellie and her younger sister Debbie share expenses on a holiday. Nellie spends $122 more than Debbie. Their total expenses amount to $840.

A) Here is a number machine. Input Output 9 x2 + 3 Work out the output when the input is 9. b) Here is the same number machine. Input Output Work out the input when the output is 17.

What is (1-2g+4h) x5

Ms. Williams drove 149 miles on Thursday and 159 miles on Friday about how many miles did she drive altogether?

If 5 times 6 = 20+y, What is the vaule of y?

A pitch will be a strike if its height is between 3.5ft and 5.5ft when it crosses home plate. The pitcher throws the ball from a height of 6ft with an initial vertical velocity of 6ft/s and a horizontal velocity of 120 ft/s.

Express the series 19+23+27 + 31 + 35 + 39 + 43 + 47 using sigma notation.

120 is 30% of what number

Center c of the circle above has coordinates of (4, 3). what is the circumference of the circle?

The perimeter of a rectangle is 68 cm. The length is 4 cm more then it's width. Find the dimensions of the rectangle