Is a empty set a subset of every set

A taxi charges an initial fee of $1.50 plus $1.50 for every mile traveled. A taxi ride coast $21.00 how many miles did the taxi travel?

What is the solution of X2-9x+18=0

Out of 30 states, the three most common insects are Monarch butterflies, honeybees, and ladybugs. The number of Of states that have monarch butterflies as their official insect is one more than the number of states that have ladybugs as their

Frank ran 65km on Monday, 68km on Tuesday, 66km on Wednesday, and 80km on Thursday. He ran again on Friday, then calculated the mean distance run per day to be 70km. How far did frank run on friday?

An apartment building contains 12 units consisting ot one and two bedroom apartments that rent for $360 and $450 per month, respectively. When all the units are rented the total monthly rental is $4,950. What is the number of two bedroom apartments?

The vertices of ΔABC are A (1,-2), B (1,1), and C (5,-2). Which could be the side lengths of a triangle that is similar but not congruent to ΔABC?

What is the solution of the system? Use the substitution method. 3x+2y=11 x-2=-4y

At what rate is a car traveling, if it goes 157.5 miles in 2.5 hours? 15 miles per hour 63 miles per hour 73 miles per hour 393.75 miles per hour

A 2-parent family with 2 children lives in Lubbock. The family is saving for college and emergencies, but pays for its own health insurance.

Explain how the vertical line test is used to determine whether a graph represents a function