What is the substitution method for

D=3c-1

D=5c+2

Marquan has 5 pairs of shoes 2/5 of them are blue. how many are colorful.

F (4) = 13, f (0) = 21 write an equation for the linear function f with the giver values

Which statement describes the difference in energy between an ice cube and liquid water.

Dana drove her car from her house to her school. she went 7 miles due west and 3 miles due south. how far is dana's house from the school?

Jack is learning to play piano. He knows that a piano has 88 keys and that there are 12 unique keys in each group called octave. How many complete octaves are on a piano?

Carl has three lengths of cable, 5 _ 6 yard long, 1 _ 4 yard long, and 2 _ 3 yard long. He needs at least 1 yard of cable.

What is the answer to 3x+5/x-3

7. Manny charges $1.25 for a cup of Temonade at the lemonade stand. He sells 9 cups. How much money does Manny collect?

If the ratio of children to adults is 7:8 and there are 140 children at an amateur surfing competition, how many adults are in attendance?

7 birds are on a fence, half of them fly away, then 2 come back. How many birds are left on the fence?