What is the answer to (10:2) + (?+3) = 40 how can I get the answer

When solving systems of we have at least two unknowns. A common example of a system of equations is a mixture problem. If I know that the solution I use to clean my car windows is 65% water and 35% cleaner, I have one relationship.

What numbers multiply to 6 and add up to 9

A random sample of n = 4 scores is obtained from a population with a mean of m = 80 and a standard deviation of s = 10. if the sample mean is m = 90, what is the z-score for the sample mean

For 3x2 - 4x + 1, match the following

Factor 10x - 25 to write an equivalent expression

Solve the equation 1.2m=0.6

Describe how to simplify the expression 3^-6/3^-4

Which equation is equivalent to log5x3 - logx2 = 2?

On a cold day in november, the recorded low temperature was - 10 degrees Celsius (°C) in Pennsylvania. On the same day, the recorded low temperature was 0°C in Michigan, - 20°C in Minnesota, and 16°C in Florida.

If each month in reno has 0.19 of rainfall as in August what would the total amount of rainfall be after 12 months