Im having trouble with this question The ninth grade class has a ratio of 4 boys to 5 girls. If there are 630 students in the grade, how many are boys?

An athlete can run at 4 meters per second how far can she run in 2 hours

A rock band has made souvenir T-shirts to sell at their concert and hopes to bring in at least $140 from the sale of the shirts. They make $4 for each adult T-shirt and $2 for every child T-shirt. I have to write a linear equation

How to prove that ice is less dense than liquid water with density, using a cup?

What is x times - 2 i don't understand the process?

Solve each given equation and show your work. Tell whether it has one solution, an infinite number of solutions, or no solution, identify each equation as an identify, a contradiction, or neither a) 20-4x=12-x+8-3x b) 5x+4x-3=24+8x c) 5x+6=

What is the rule for 24, 48, 72,

Eight more then the number Let n represent an unknown number

Yoku Is putting on sunscreen. He uses 2 ml to cover 50 cm² of his skin. He wants to know how many milliliters of sunscreen he needs to cover 325 cm² of the skin.

Find the measures of

Which value of x makes this inequality true? X + 9 < 4x