Find the solution (s) for x in the equation below.

x2 + 10x + 21 = 0

Find the probability selecting a green, then another green marble from a bag of 5 red, 8 green, and 3 blue marbles when (a) you replace the first marble before drawing the second, and (b) you do not replace the first marble.

You are adding 3 wholes 2/3 plus 2 wholes 2/3 using fraction strips explain how you rename the fraction part of the problem

Negative 4 over 5 plus fours times one over three

Amy's age plus Betty's age is 29 years. Amy's plus Carl's age is 27 years. Betty's plus Carl's age is 22 years. What is the difference between the oldest child and the youngest child is?

sonia vendio la mitad de los melones que tenia mas medio melon. Despues se comio el melon que le quedo. cuantos melones tenia?

5 ducks to 30 geese What's the meaning?

Given the explicit formula for an srithmetic sequence find the first five terms and the 52nd term

Negative three plus x equals eleven

A rectangular room has a length of 20 ft, width of 48 ft, and height of 10 ft. Use the Pythagorean Theorem to find length BC and length AB. Round to the nearest tenth, if necessary.

The Hu family goes out for lunch, and the price of the meal is $58. The sales tax on the meal is 7%, and the family also leaves a 15% tip on the pre-tax amount. What is the total cost of the meal?