solve the system of linear equations

x + y = 4 and 2x + 3y = 0

Solve for x. -6x = - 18

Express x2+10x+30 in completed square form

Write a doubles fact you can use to find the sum. Write the sum 7+6

North Korea has a populatiion of 25 million people, of whom 1.1 million are in the military. South korea has an army of 650,000 out of a population of 49 million. What percentage of the population is in the military in i. North Korea? ii.

Find the x-intercept of the graph of y = a x + b. (Assume b ≠ 0.)

A science teacher has a supply of 20% saline solution and a supply of 50% saline solution. How much of each solution should the teacher mix together to get 60 ML of 28% saline solution for an experiment

There goes my hopes for Virtuoso rank ... What are the zeros of the function y = x2 + 10x - 171, and why?

Which is greatest ... 63 of 100, 60% of 80, 3/5 of 85,

John can eat 10 hot dogs in 4 mins. At this rate, how many hot dogs can he eat in 18 mins?

wo positive integers are 3 units apart on a number line. Their product is 108. Which equation can be used to solve for m, the greater integer? m (m - 3) = 108 m (m + 3) = 108 (m + 3) (m - 3) = 108 (m - 12) (m - 9) = 108