Simplify the expression by using a double-angle formula.

cos-39° - sin²39

How do you average percentages?

788 students at elementary school each child is giving one color T-shirt The teachers are red green yellow and blue there is an equal number of each color T-shirt how many students received a red T-shirt

What's the part of speech of mince

Scarlet has a box with 16 black pens and 8 red pens. The probability that a pen randomly picked from the box is a red pen is___ Scarlet uses a six-sided die to find the probability that each color of pen is picked.

What is the area of the triangle if the base is 5 centimeters and the height is 6 centimeters? A. 15 cm2 B. 12 feet C. 4 m3 D. 16 inches

Which of the graph of f (x) = x-1/x^2-x-6

Y is equal to one less than the square of x

Ken is thinking of a number. nine more than the product of 4 and the number r is 73. find Ken's number

Consider the functions f (x) = 2x + 1 and g (x) = x2 - 10. What is the value of f[g (3) ]? 39 -3 -7 -1

Last years average ticket price was £22 this year the average ticket price has increased by 5% what is the average price now