Solve system of linear equations by substitution - 2x+9y=15

x+7=4

The local animal shelter had 12 dogs at the beginning of the week. Since then, the number of dogs at the shelter has decreased by 9. What is the percent change in the number of dogs at the animal shelter this week?

if five times a number added to 4 is divided by the number plus 6 the result is nine halves, Find The Number

What are the roots of the equation x^2+6-9=0

If t = 24 cm and r = 25 cm, what is the length of s?

What is the quotient and remainder for 52 : 8

Use factoring to solve this x^2-4x-12=0

The amazon rainforest covered 6.42 million square kilometers in 1994. In 2014, it covered 50/59 as much. Which is closest to the area of the amazon forest in 2014? A. 6.4 million km2 B. 5.4 million km2 C. 4.4 million km2 D. 3.4 million km2 E. 2.

In june 2005, Peter mailed a package from his local post office in Fayetteville North Carolina to a friend in Radford, virginia for $2.07. the first class rate at the time was $0.23 per ounce.

Tasha is decorating a rectangular bulletin board by putting ribbon around its outer edge. The bulletin board is 14 in wide and 18 in tall how many inches of ribbon does she need?

What is the relationship of the angles of a triangle