Solve using substitution.

x + 3y = - 13

5x + 7y = - 9

Tamela runs 7.2 miles every day. Blake runs 3.9 miles every day. How much farther does Tamela run than Blake? Explain how u used mental math to determine the difference.

A father is 1 year younger than 3 times the age of his son. The son is 20 years old. Let F = the age of the father, what formula would calculate the fathers age?

The sum of two consecutive odd integers is 36. What are the integers?

Simplify: 45x^6/9x^4 anyone?

If the last digit of weight measurement is equally likely to be any of the digits 0 through 9. Round your answers to one decimal place (e. g. 98.7). What is the probability that the last digit is 0?

A store offers 20% off all items. If x is the original price, which expression represents the final price with the discount? select all that apply. A. 1.2x B. 0.08x C. x D. x - 0.2x E. x + 0.2x

What is 8.49*10-7 in decimal form 0.0000000849 i think this one? 0.000000849 8,490,000 849,000,000

A bank charges you $3 each time you use an out of network Atm. At the beginning of the month you have $1500 in your bank account. You withdraw $60 from your bank account each time you use an out of network ATM.

2.8% as a fraction in simplest form

What is the reason for each step in the solution of the equation? 3x-2=4 Drag and drop the reasons into the boxes to correctly complete the table.