Solve each system of equations by substitution

X + 3y = 6

-x + y = - 7

Two cars start from two towns 500 miles apart and travel towards each other. They pass each other after 5 hours. Find the speed of each car if the difference between their speed is 40 miles per hour.

If the measure of an exterior angle of a regular polygon is 24, how many sides does the polygon have?

You find a job that pays $15 per hour after working for one year you will get a 4% raise what will your new raise rate after one year

Juan pulled a red card from the deck of regular playing cards. This probability is 2652 or 12. He puts the card back into the deck. Will his chance of pulling a red card next time change?

Sonji has $5.25 in nickels and dimes. The coin value can modeled by the equation 0.10+0.05n=5.25, where d represents the number of dimes and n represents the number of nickels. If sonji has 21 dimes, how many nickels does she have?

If there are 13 values in a data set in order from smallest to largest what is the first quartile of the data set a. The mean of the 4th and 5th values b. The mean of the 3rd and 4th values c. The mean of the 2nd and 3rd values d.

The zeros of the function f (x) = (x+2) ^2 - 25 are?

What value of X makes 13 - (9) = X a true sentence

Let f (x) = x^2 + 6 and g (x) = x+8/x. Find (g ° f) (-7)

What is - 3/4, 0.5, 2/3, - 7/3, 1.2 in order from least to greatest