How do I write double the sum of seven and a number in mathematical terms?

3st+2su-4sv factorised

A cable service provider charges $40 per month for its basic package plus an additional $5.35 for each premium channel chosen. The average cost for cable per additional channel is given by the expression 5.

How to solve 2 (5) (2root3)

Is the equation x+9x-4 a linear equation? Why or why not?

Which of the following values can NOT be measured using SI units? a. length c. temperature b. density d. All can be measured with SI units

What is the vertex of y=x^2+2x-1?

Wholesale price $12.50. %Markup 78% what is the $Markup and retail sale price

The SAT mathematics scores in the state of Florida are approximately normally distributed with a mean of 500 and a standard deviation of 100.

The new pane will cost $91.00 plus an additional fee for installation. a local contractor charges $120 per hour for installation. if it only takes 45 minutes to replace the window, what will be the total cost?

What's the mean median mode range of 29.3 31.7 32.4 46.3 48.9