What is the value of the expression?

0.9 (1/2-2) + 0.6

Irwin rode his bicycle from one end of a trail to another and back at a speed of 20 miles per hour. If the trail is 4 miles long, for how many hours was Irwin riding? a. 0.2 hoursB. 0.4 hoursC. 2.5 hoursD. 5.0 hours

3. 6076 divided by 98

A banner is made of a sqiare and a semocircle. the square has side lengths of 26 inches. one side of the square is also the diameter of the semicircle. what is the total area of the banner?

Divide. (-5w^10+10w^8+5w^6) / (5w^5)

Solve for x. Write the smaller solution first, and the larger solution second. (x + 3) ^2 - 4 = 0

The perimeter of an equilateral triangle equals 3 times the length of one side. Write a function using two variables for this situation. Find the perimeter of an equilateral triangle with sides 18 inches.

Jenny wants a total of 12 barbies dolls by the time she is 9 years old. Right now she has 4 barbie dolls. How many more does she need? Write an equation and solve. A) x + 4 = 12; Jenny needs 8 more barbie dolls.

If f (x) = x2 + 1, find f (a + 1).

Is this equation linear: 2y=x+x+1

The equation y=ax describes the graph of a line. If the value of A is megative the line: a) goes down and to the left b) goes up and to the left c) is vertical d) is horizontal