In an online shop, 800 copies of a textbook have been sold, including new and used ones, and a total of 7110 euros has been obtained. A new books costs 10 euros, while the used ones are sold...

In an online shop, 800 copies of a textbook have been sold, including new and used ones, and a total of 7110 euros has been obtained. A new books costs 10 euros, while the used ones are sold...

Big Ideas Math saids that I am wrong even though I think I am right.

find 2 consecutive even integers such that the square of the second, decreased by twice the first is 52

Two hundred thirty-two of the 358 high school students surveyed at a local school say they plan on taking some form of postsecondary education. Calculate the margin of error (ME), rounded to the nearest...

solve: -9/28x + 24/28x +6x please show step by step

Which of the following equations has both 2 and −4 as solutions? a. x2 + 6x + 8 = 0 b. x2 - 2x - 8 = 0 c. x2 + 2x - 8 = 0 d. x2 - 2x + 8 = 0

It's an equation I need to learn

Write the first equation- 2x+2y=?? Write the second equation- x=y+?? What is the length ?? What is the width ??

Ben and Patrick work the closing shift at the same restaurant but on different evenings. The average time it takes Ben to close the restaurant is 125 minutes. This is 20 minutes more than the time...

Determine if the following equations define the functions of x: a. y=√x+5 b. x2+y2=5

calculating a result from two pieces of information

Question: If the reaction of 20.7 grams of CaCO3 produces 6.81 grams of CaO, what is the percent yield? Equation: CaCO3 = CaO + CO2

Manjit\ is\ now\ 12\ years\ old\ and\ mala\ is\ 2\ years\ old.In\ how\ many\ years\ will\ manjit\ be\ 3\ times\ as\ old\ as\ mala

the ramirez family and the gonzales family each used their sprinklers last summer. The Ramirez family sprinkler was used for 35 hours.the gonzales Family sprinkler was used for 15 hours. There was...

possible values for x and y x2+ 2xy - x =200

what is the answer of this question ?

Solution of the equation.

Equation: C3H8 + 5O2 = 3CO2 + 4H2O (already balanced) a) If you start with 14.8 g of C3H8 and 3.44 g of O2, determine the limiting reagant b) Determine the number...

-The largest angle is 12 times the smallest angle -The middle angle is 5 times the smallest angle Find the measures of the angles. Provide a step-by-step discussion regarding how you would...

Please help!!!