When you exercise, your target heart rate r at 90% can be determined by the formula r = 0.9(250 − a) where a represents your age in years. Solve the formula for a.

Vinay constructed this spinner based on the population of teachers at his school according to vinays model what is the probability that he will have a male history teacher two years in a row

Select the correct answer. what is the exact value of sin (157.5°)? a. 'sqrt(2 - sqrt(2))/2 b. *"-"'sqrt(2 + sqrt(2))/29 c.'sqrt(2 + sqrt(2))/4" d. "-"sqrt(2 + sqrt(2))/4)

If x-1 and x+3 are the factors of x3+10x2+ax+b find a and b