2x-y+z=9 x+y-2z=-1 - x+2y+2z=-5

For a normal distribution, what z-score value separtes the lowest 20% of the distribution from the highest 80%?

Whats equivalent to 18/4?

Amber earned $14.50 babysitting on Saturday. On Sunday, she spent $6.95 when she purchased a movie ticket. She needed to borrow money from a friend to complete her purchase of a snack.

What is 3divided by 1000 divided by5

What value of x makes this equation true? 1.2x+5=0.9+10

Joe and his parents are going on vacation. On the first day they travel 250 miles. On the second day they travel 300 miles. The total miles they must travel is 1000.

Find x when y=3 in the literal equation 3x+6y=24

The sequence below is arithmetic {1,8,27,64}

Angles α and b are the two acute angles in a right triangle. Use the relationship between sine and cosine to find the value of b if b < α. sin (x 2 + 2x) = cos (2x + 3x 2)

Kevin has mowed 40% of the lawn. If he has been mowing for 20 minutes, how long will it take him to mow in a hour?