Write and solve the system using any method:

Find the value of two numbers if their sum is 25

and their difference is 7.

This is a 3 part question; answer all 3 parts.

1. Write the first equation.

2. Write the second equation.

3. Write your solution

There are 3 red, 1 blue and 2 yellow marbles in a bag. Once a marble is selected it is not replaced. Find Plred then yellow). a) 5/13 b) 1/7 c) 6/13 d) 5/7

Simplify each expression by combining like terms. x^2 + x (x - y) + 10xy

What is this used for in math []

Jason spent half of his allowance going to the movies. He washed the family car and earned 7 dollars. What is his weekly allowance if he ended with 15 dollars?

A certain food has a gluten of 13mg of gluten per L of the food. What is the gluten ratio in microgram per millimeter?

The table below shows the relationship between the number of hours Nina worked and the number of hours Kathy worked.

Determine all of the roots (or zeros) 4x^3-4x^2-11x+6=0 if 2 is known to be one of the roots

In a small town there are two main sections called the Hill section and the Lake section. The town has a population of 4298. The number of people who live in the Hill section is 188 more than twice the number of people who live in the Lake section.

Two accounts each begin with a deposit of $5000. Both accounts have rates of 5.7 %, but one account compounds interest once a year while the other account compounds interest continuously.

Blue whales eat an average of 5,000 pounds of fish daily, with a standard deviation of 850 pounds. Approximately what percentage of blue whales eat more than 7,550 pounds of fish? 15.87% 5% 0.3% 0.15%