How do i solve 7x-y=21

All zeros of polynomial function 3x^4 + 14x^2 - 5

The price of a wallet is $31.95 and the sales tax is 7.5%. What is the total cost of the wallet? Enter your answer in the box.

Priyanka is trying to find the area of this rectangle she already measured one side 10 cm which other lengths could she measure to use in her area calculation explain your reasoning

A ball is thrown upwards and it's height h m, at time t s, is given by h=7t-4.9t2. How long does the ball spend more than 1.5m above ground?

Find the value of n in the equation 6.2n - 3.7n = 85 + 45. A. 16 B. 325 C. 13.13 D. 52

There are 396 persons in a theater. If the ratio of woman to man is 2:3, and the ratio of men to children is 1:2, how many men are in the theater.

In the united states, 73% of people wear a seat belt while driving. if two people are chosen at random, what is the probability of A. at least one of the two are wearing belts B. only one is wearing a belt C. explain why the events independent

X + (-13) = - 5 what is the solution to the following equation

Suppose you have 5 red cards, 10 green cards, and 11 blue cards. The cards are well shuffled and you randomly draw one card.

What is the least common multiple of 4 and 10?