42=7r I am also Very confused with this one I am not very smart.

6k + (3•10-8) = (3•3) k+22

Lisa makes a cherry pie and an apple pie. she cuts the cherry pie into six equal wedges and she cuts the apple pie into eight wedges. how many degrees greater is the measure of a cherry pie wedge of an apple pie wedge?

I need step by step instructions on how to get the y-intercept for the following function: f (x) = x^3-18x^2+107x-210.

40% of what number is 18?

3 1/8+2 2/6 = how do you solve this problem and 2 ways to solve this problem

Write an equation with the solution x=20?

A sequence has a first term of 2 and a constant ratio of - 3/2 what are the first five terms of the sequence

A three-dice is a six sided dice with only the numbers 1, 2 and 3. The usual numbers 4, 5 and 6 are replaced by 1, 2 and 3 respectively. 4 three-dice (with sides labeled 1, 2, and 3) are rolled and the numbers face up on the 4 dice are recorded.

Judy is making scarves to give to her family as gifts. She needs to make 5 scarves and each scarf is 3.75 feet long. How many yards of fabric does Judy need to buy?

Find the margin of error for a 95% confidence interval for estimating the population mean when the sample standard deviation equals 100 , with a sample size of (i) 484 and (ii) 1764. What is the effect of the sample size?