2x+y=-11; 3x-4y=11

How do I solve this by substitution?

A survey was done that asked people to indicate whether they run or ride a bike for exercise. Based on the table, what is the percentage of runners who do not bike? Bike Do not bike Run. 727.103 Do not run. 121.052

Fred begins walking toward johns house at 3 miles per hour. John leaves his house at the same time and walks towards Fred's house on the same path at a rate of 2 miles per hour.

0.06 is 10 times as much as

Find the gcf of each numbers 21,30

Jonah was standing at an elevation somewhere between - 1 1/2 and - 2 1/3 meters with regards to sea level. Which number could be Jonah's elevation with regards to sea level?

Given a quadratic function, f (x) = ax 2 + bx + c has a positive leading coefficient and the vertex that has a y-coordinate of zero. Determine the number of real zeros of the function.

Factor the expression 36a+27+90d 35g+50 18u+81 I know it's a lot I'm sorry

Seth made 5 identical birdhouses in 4hours what fraction of an hour did it take Seth to make one birdhouse

56 1/4 as an improper fraction

You choose a card from a standard deck cards at random. What's the probability that you don't choose an ace? Explain.