If the variance of a variable is 169, what is the standard deviation?

Alley has 10 kittens, and 4 puppies for sale. 4 of the kittens are girls and 6 are boys. 3 of the puppies are boys, and 1 is a girl.

The perimeter of a rectangle is 50 feet and its area is 154 feet. What are the dimensions of the rectangle

Susie is participating in a bake sale for a fundraiser. She baked 8 pies to sell. Two pies weigh 105 g each, one pie weighs 106 g, two pies weigh 108 g each and the last three pies weigh 103.5 g, 102 g and 104.5 g.

Jenna has a savings account invested in stocks and bonds. 20% of her savings is in bonds. If Jenna has $2,200 in bonds, how much does she have in savings all together? I got the right answer guys it is 11,000

19 - [1/4+1/5]=the answer

2/3 + 1/4 - 3. What is the anwser

What is the slope of 4/3 and 6,2

5=-10x-10y What's the slope for this parellel line?

8t-r=12t, solve for t

Joseph sees 4 2/3 doughnuts sitting on a table. Unable to restrain himself, he gobbles down 3/4 of the 4 2/3 doughnuts. How many doughnuts does he eat?