What is equivalent to 8 + 18a - 2 + 6a

What is the GCF of 30 and 49?

Ari measured the density of quartz three times: 2.49 g/cm3, 2.56 g/cm3, and 2.72 g/cm3. The accepted value is 2.65 g/cm3. What is the percent error of Ari's average measurement?

Andy tells Jon 4=4. Jon says he is wrong. Explain who is correct

Length of a rectangle window is 5 3/4feet and it width is 3 1/2 feet what is the area of this window

What is the perimeter of a triangle with side lengths of 9 in, 7 in, and 13 in?

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?