ACT Math

What is the formula for the area of a rectangle?

• A = x + y

• A = x * y

• A = 2(x + y)

• A = x / y

What is a linear equation?

• A linear equation is an equation that makes a straight line when graphed.

• A linear equation is an equation that forms a curve when graphed.

• A linear equation is an equation that has no solutions.

• A linear equation is an equation that only contains whole numbers.

What is the formula for the circumference of a circle?

• C = πd

• C = 2πr

• C = r^2

• C = 2r

What is the difference between 3x² - 2y and 2x² - 3y when x = 3 and y = 5?

• 10

• 12

• 14

• 16

What is the value of 3x² - 2y when x = 3 and y = 5?

• 15

• 17

• 20

• 10

How do you calculate the slope of a line given two points (x1, y1) and (x2, y2)?

• m = (y2 - y1) / (x2 - x1)

• m = (x2 - x1) / (y2 - y1)

• m = (y1 + y2) / (x1 + x2)

• m = (y1 - y2) / (x2 - x1)

How do you calculate the mean of a set of numbers?

• By adding all the numbers together and dividing by the count of the numbers.

• By multiplying all the numbers together and dividing by the count of the numbers.

• By taking the largest number and subtracting the smallest number.

• By averaging the highest and lowest numbers only.

How do you find the midpoint of a line segment between two points (x1, y1) and (x2, y2)?

• M = ((x1 + x2)/2, (y1 + y2)/2)

• M = (x1 + x2, y1 + y2)

• M = ((x1 - x2)/2, (y1 - y2)/2)

• M = (x1 - x2, y1 - y2)

What is scientific notation?

• A method of expressing numbers as a sum of digits

• A way of expressing numbers as a product of a number between 1 and 10 and a power of 10

• A technique for rounding numbers to the nearest whole number

• A system for categorizing numbers based on their size

Convert 6700000 to scientific notation.

• 6.7 x 10^5

• 6.7 x 10^6

• 67 x 10^5

• 0.67 x 10^7