Solve the system of equations by substitution.

X=-4y

X+5y=2

In a survey, 36% of the students said that they kept an electronic diary. There were 900 students who kept an electronic diary. How many students were in the survey?

Is this formula explicit or recursive? And find the first five terms of the sequence. Ax=-4n (n-1)

A buffet restaurant has one price for adults and another price for children. the taylor family has two adults and three children, and their bill was $40.50. the wong family has three adults and one child. their bill was $38.

Approximately 18% of the calls to an airline reservation phone line result in a reservation being made. (a) suppose that an operator handles 15 calls. what is the probability that none of the 15 calls result in a reservation?

A cell phone plan allows 500 min of calling each month. The new plan will increase the number of minutes by 150%. What is the number of minutes allowed on the new plan?

Solve 2x2 + 5x + 5 = 0. Round solutions to the nearest hundredth.

Determine if the ratios are proportional. 4/5 and 15/20

What is the angle of a triangle if one angle is 68 and the other is 52

List the angles from smallest to largest?

If a number is located farther right on the number line than another, then it is larger. True False