X + 1 + 2x+2=78 solve multi step equation

Alex has a rectangle piece of red paper that is 4 centimeter wide. its length is twice it's width she glues a piece of paper blue paper on top of the red piece measuring 3 cm x 7 cm how many square centimeters of red paper will be visible on top

The average of mindy's two test scores must be at least 92 to make an A in the class. mindy got an 88 on her first test. what scores can she get on her second test to make an A in the class?

3 csc^2 (2x) + 2 cosec 2x = 1-cot^2 (2x)

Parallelogram:h=5 1/4ft; A=12ft

Eric's dad asks him to figure out the tax on the meal his family just finished eating at their favorite restaurant. The total bill for the meal is $57.60. The tax is 7.5%. What is the tax amount for this meal?

Why is 4 a natural number?

Students at university x must be in one of the class ranks, freshman, sophomore, junior, or senior. at university x, 35% of the students are freshmen and 30% are sophomores.

Assume that your production line has a quota of 10 units per day at $25.00 per unit an your line meets its quota

The equation f = v at represents the final velocity of an object, f, with an initial velocity, v, and an acceleration rate, a, over time, t. Which is an equivalent equation solved for a?

Class 10R sat a test. The mean mark of the class was 70%. There are 30 students in class 10R, 20 of whom are boys. The mean mark for the boys in the test was 62%. Work out the mean mark for the girls.