Which pair of lines is perpendicular?

a. y=2x-1 and2y=-x+3

b. y=3x+4nand3y-x=5

c. y=-4x+2 and x+4y=6

d. y=-6x-3 and 6x-y=4

What is the unit rate of $4.20 for 6 muffins

A rectangle is 2/5 inches long and 1/3 inches wide. What is the area of the rectangle? Enter your answer as a fraction in simplest form. By filling in the boxes

List all the permutations of three objects m comma l comma and n taken two at a time without repetition. What is 3 Upper P 2 ? List all the permutations of three objects m comma l comma and n taken two at a time without repetition.

Simplify this. 4 (b-1) ²-9

The ratio of circumference to diameter is called

Factorise then following X^2-3x+2

Mr Murray's distance away (in meters) from his classroom after t seconds can be modeled by the following equation: M (t) = 3.5t + 2. After 3 seconds, how far is Mr Murray away from his classroom?

The upper arm length of females over 20 years old in a country is approximately Normal with mean 35.8 centimeters (cm) and standard deviation 2.5 cm. Use the 68-95-99.7 rule to answer the following questions. (Enter your answers to one decimal place.

The radius r (cm) of a circle is related to time t (seconds) by the equation r=0.4t + 1.5. (a) Calculate the initial value of the radius. (b) Find the rate of change of r.

Write in expanded form six hundred twenty six and fourteen thousandths