A system of two equations is shown below:

Equation C: a = 3b + 6

Equation D: a = 7b - 1

What value of a can be substituted into equation D to solve the system of equations?

3b

7b

3b + 6

7b - 1

The circumference of the circle 31.4 find the radius

What percent of 150 is 63?

What ordered pair is a solution to y = x + 5 and x - 5y = - 9? I also need to show the work.

You and a friend buy two fruit smoothies and leave a tip. You split the total and your half cokes to 3.60. What percent tip (in decimal form) did you and your friend leave if the fruit smoothies cost $3 each?

Sally wants to fill ten 8 inch tea glasses. how much tea does she need?

Which of the following is an example of an equation? 2m + 1 x + 7 9 - X + 7 X-8 = 12

Solve the equation. - 5x + 2 = 67 A) x = 13 B) x = - 13 C) x = 69 / 5 D) x = - 69/5

Mr. Li has a bag of Skittles. There are 5 blue Skittles, 3 red Skittles, and 12 yellow Skittles. What is the probability of pulling out a blue Skittle? Express your answer as a simplified fraction. BONUS: What is your answer as a percent?

Sarah and Emmaree put on just dance. After school. When they started, it was 4:45pm and they danced until 5:30pm how many degrees does the minute hand turn by the time they stop dancing?

A gigameter is 1.0*10^16 kilometers. How many square kilometers are in 5 square gigameters? Write your answer in scientific notation.