Solve the system

{3x-y=4

-9x+3y=-12

Jay was reaching into her purse and accidentally spilled her coin purse. 10 pennies fell on the floor. Jay noticed that only 2 of the pennies landed on heads. What is the theoretical probability of this happening?

8 over 15 minus 1 over 5

7 divided by what equals 7.35

Green sea turtles can grow to be more than 3 feet long the aquarium has one sea turtle that weighs 264 pounds and a younger turtle that weighs 186 pounds to the nearest hundred what is the weight of the 2 sea turtles together

It is estimated that 20% of the members of a health club have high blood pressure. If 300 members of a club are randomly selected, about how many of them can be expected to have high blood pressure? What is the standard deviation?

Ari stocks shelves at a grocery store. He puts 35 cans of juice in each display case. The case has 4 shelves with an equal number of cans, and one shelf with only 3 cans. How many cans are on each of the equal shelves?

What does stack them mean in math

In order for the data in the table to represent a linear function with a rate of change of + 5, what must be the value of m? m=3 m=2 m = 18 m=33

Write an expression for the speed of the boat coming back from the island in terms of the other boat's speed. let x be the speed of the boat you are taking to the island.

Write down all the even numbers from 30 to 300 how many times will 6 appear