Simplify each expression. Justify each step.

1 - (5n*9) * 2n

2 - 3X * (7*X)

3 - (4m*2) * 5m

4 - (7+47+3) [5 * (2*3) ]

What is h is tripled and then decreased by 8

Explain how to find the "geometric mean" of two numbers.

Todd is 30 years old. If his target heart rate during aerobic activity is 60-90 % of his maximum heart rate, how fast should his heart beat during exercise (in beats/min) ?

How do you write 1,000,000 in expanded form

There are 21 students in the coding club this year. This is a 40% increase from last year. How many students were there last year. A) 8 students B) 6 students C) 15 students D) 12 students

A family pays $45 each month for cable tv. The cost increases 7%. How many dollars is the increase? What is the new monthly cost?

The circumference of a large crater is about 219 m. what is the radius of the crater?

A rectangular pen is made with 100 m of fencing in three sides. The fourth is a stone wall. Find the greatest possible area of such an enclosure.

Simplify - 2 (v+5) + 5 (4v-2)

Find the square root of 156.25 by division method