Which expression is equivalent to - 4-9

pharmacist has an 18% alcohol solution and a 40% alcohol solution. How much of each should he mix together to make 10 liters of a 20% alcohol solution?

X^5+8x^4-36x^3-271x^2+371x+1470 divided by 3x^2-9x-30

How do you construct a unique rhombus

What conclusion can be based on the given statement? x is a number such that 7x = 7y

A store has a total of 15 bicycles and tricycles. There are 37 wheels. How many tricycles does the store have?

Write two like terms using whatever variable (s) you'd like. be sure to include exponents. explain why these are like terms.

When alexis works overtime (any hours over 40 hours a week), she is paid 1.5 times her regular hourly rate. in one week, she worked 51 hours. if her regular hourly rate is $7.05, how much did she earn that week?

You have 5,814 feet of rope that you need to cut into 27-foot sections. How many sections of rope will you have? a. 215 sections with 8 feet left over b. 215 sections with 9 feet left over c. 218 sections with 3 feet left over d.

The WorldLight Company produces two light fixtures (Products 1 and 2) that require both metal frame parts and electrical components. Management wants to determine how many units of each product to produce per week so as to maximize profit.

Assume there is a variable, h already associated with a positive integer value. write the code necessary to compute the sum of the first h perfect squares, starting with 1.