Twelve students in a class average 70% on a certain test. eighteen others average 80%. what is the overall average of the thirty students as a percent

If the common difference in an arithmetic sequence is 4, and the 20th term is 36, what is the first term

Beef is $11.99 per pound and chicken is $6.49 per pound. Kevin wants to purchase 2.5 pounds of beef and 1.8 pounds of chicken. How much does he spend?

What slope does a horizontal line have? Use a number to fill in the blank.

Slope = 2 over 5 y intercept = 2

Simplify the expression square root - 1 / (3+8i) - (2+5i) a. 3+i/10. b.-3+i. c. 3-I/10. d.-3-i/10

5 Connie is working to earn $200. She earns $25 mowing her grandmother's lawn and $60 for a day of housecleaning. Which decimal represents the part of the money Connie still needs to earn and why? A 0.575 B 0.115 C 0.425 D 0.85

A farmer sells 9.7 kilograms of apples and pears at a farmer's market. 1/4 of the weight is apples and the rest is pears. How many kilograms of pears did she sell at the farmer's market What is the fraction

An penguin is 45 inches tall. It is 24 inches taller than a rockhopper penguin. Write and solve an equation to find the height of a rockhopper penguin. Is your answer reasonable? Explain.

Kyra observed that 85% of the students at a library liked reading mystery stories. If 30 students at the library did not like reading mystery stories, the number of students at the library who liked mystery stories was.

Two lines intersect and two of the vertical. angles measure 37 what is the measure of the other two vertical angles