What is the ratios that are equivalent to 8:20

Three times a number minus ten is equal to the sum of twice the same number and five. The equation below represents the situation 3x-10 = 2x+5 What is the value of x?

The number of nails of a given length is normally distributed with a mean length of 5 in. and a standard deviation of 0.03 in. In a bag containing 120 nails, how many nails are between 4.97 in. long and 5.03 in.

Find the GCF of the numbers five and 11 using prime factorization

The number of seats in the rows of stadium form an arithmetic sequence. Two employees of the stadius determine that the 13th row has 189 seats and the 25th row has 225 seats. How many seats are in the 55th row?

Solve the rational equation x over 5 equals x squared over quantity x plus 2 and check for extraneous solutions.

A manufacturer fills an order for 4,200 smart phones. The quality inspector selects a random of 60 phones and finds that 4 are defective. How many smart phones in the order are likely to be defective?

Easiest way to remember complete the square for the right side?

Celia is comparing two different antivirus programs. StaySafe costs $22 for the first year and $5 for each year she renews. VirusProtector costs $10 for the first year and $8 for every year she renews.

What is the value of (3a^-2b^6/2a^-1b^5) ^2 when a=3 and b=-2

What is 2/9 times 2 2/3?