There are 20 pens in a package. Ten of the pens are black, 8 are blue, and the rest are red. Which ratio represents the number of red pens to black pens?

A. 1/10

B. 1/5

C. 4/5

D. 5/1

Bert is planning to open a savings account that earns 1.6% simple interest yearly. He wants to earn exactly $240 in interest after 3 years. How much money should he deposit? A. $50 B. $500 C. $3,840 D. $5,000

Whats the answer to 8p squared minus 16 p=10

At the moment a certain medicine. Is injected, it's concentration in the blood stream is 120 mg/L. From that moment forward, the medicine concentration drop by 30% each hour.

Solve for s. 2/3s + 5/6s = 21 s =

From the set of 5, 6, 38 use substitution to determine which value of x makes the equation true. 6 (x+33) = 228

At Davidson's Bike Rentals m, it cost $17 to rent a bike for 4 hours. How many hours of bike use does a customer get per dollar?

What is k in terms of n?

Each time you roll a die how many equally likely outcomes are there?

Use prime factorization to find the GCF of 60 and 88

What is the vertex of this quadratic function? h (x) = - 5 (x + 7) 2 + 11 A. (7,11) B. (7,-11) C. (-7,-11) D. (-7,11)