How do you solve systems of equations by substitution

What is the lower limit of f (x) = x^5 - 3x^3 + 24

How many 1/5 parts are in 4

Nora and Ryan are making stufed animals for a toy drive. The table shows the fabric purchases they made (Nora with 4$ with 2/3 of fabric and Ryan with 6$ for 0.8 of fabric). Who purchased the more expensive fabric?

What are three equivalent ratios to 2/20?

Juan found four pieces of wire in his tool drawer. Here are the lengths (in centimeters) 17, 18.1, 11.8, 3.03 What is the total length of the four pieces of wire?

14 plums cost $2.00. What is the cost, to the nearest cent, of 50 plums?

List the perfect cubes between 1000 and 3000

Cathy earns $13.50 per hour for the first 40 hours worked in a week and $20.25 per hour for hours over 40. If she earns $661.50 one week.

Tell which property is being illustrated. 13 + (29+7) = 13 + (7+29)

8$ of 25$ earned as profit what is the percentage