3x + y = - 21

x+y=-5

solving systems of equations by substitution

Sam had $24 to spend on 7 pencils. After buying them she had $10. How much did each pencil cost?

Carroll borrowed $500 at 14% interest for 6 months. How much interest did she pay? A. $23.75 B. $35.00 C. $42.50

Let a and b be events with p (a) = 0.51 and p (a ∩ bc) = 0.4. for what value of p (b) will a and b be independent?

Subtract the sum of 126 and (-747) from the sum of 135 and (-136)

If Mary walks 3 feet every 2 seconds, how many feet does she walk in an hour?

6:2 1/4 what is the anwser

For a fundraiser adam earned $45, which is 7times aa much as Lana earned. How much did Nancy earned?

In a certain community, eight percent of all adults over age 50 have diabetes. If a health service in this community correctly diagnosis 95% of all persons with diabetes as having the disease and incorrectly diagnoses ten percent of all persons

Alison wants to find the total cost of buying 4 adult admission tickets to an amusement park. identify the input and output

Mary rolls a die. What is the chance of her rolling a three?