Astudent is trying to solve the system of two equations given below: equation p: y + z = 4 equation q: 3y + 7z = 15 which of the following steps can be used to eliminate the y term? (4 points) select one: a. −3(y + z = 4) b. 3(y + z = 4) c. −1(3y + 7z = 15) d. −3(3y + 7z = 15)

Its due ! write an equation in which the quadratic expression 2x^2-2x 12 equals 0. show the expression in factored form and explain what your solutions mean for the equation. show your work.

Part a: sam rented a boat at $225 for 2 days. if he rents the same boat for 5 days, he has to pay a total rent of $480. write an equation in the standard form to represent the total rent (y) that sam has to pay for renting the boat for x days. (4 points)

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?