Will give a brainliest!

Which could be the resulting equation when elimination is used to solve the given system of equations?

5a+5b=25

-5a+5b=35

10a = 60

10b = 60

-10a = 60

-10b = 60

What is 7.2/x for x = 0.4

17. A school custodian waxed a gymnasium floor that measured 20 feet by 20 feet. How many square feet did she have to wax?

Bryan is setting in rows he has 50 black chairs and 60 white chairs

How do you do systems of substitution?

In the context of this null hypothesis, determine the standardized statistic from the data where of kissing couples leaned their heads right. Hint: You will need to get the standard deviation of the simulated statistics from the null distribution.

Joe's house is 5.5 km from the creek, the distance between Jane's house and the creek is twice as far as Joe's house how much further is Jane's house from the creek than Joe's house in meters metric

John had 84 dollars, and his brother Fred owed 12 dollars to his friend. John gave his brother some money. Fred paid his debt and now both of them has the same amount left. How much money did John give Fred?

True or false: dilations map angles of the same degrees

The rental fee for a bike is $4 plus $1.50 per hour. Write an equation in slope-intercept from that models this situation.

Share 200 in the ratio 3:1:4