Where can we put parentheses in the following expression to make it equivalent to 7?

(20-6) : 2

or

20 - (6:2)

Solve the following system of equations by substitution and select the correct answer below: 2x - 4y = 24 4x - 12y = 36 x = 18, y = 3 x = 18, y = - 3 x = - 18, y = 3 x = - 18, y = - 3

What is the definition of similar figures

Which board geometrically represents 4x2 - 1 using algebra tiles?

You need 1 1/4 cups sugar to make 20 cookies. To make 12 cookies, you will need how many cups of sugar?

What is the total surface area of a cuboid whose dimensions are 12cm x 8cm x 3cm?

The ratio in size of Gabriel's room to her brother Giorgio's room was 5:3. The area of Gabrielle's room was 240 square feet. If Giorgio's room was square-shaped, what was the length of his room?

A student estimates that it would take 3 hours to write a book report, but it actually took her 5 hours. What is the percent error?

Jerry makes 20$ an hour. He spends 30 dollars a day on transportation and food. Write an expression to describe his spending and earnings for the day, where x is the number of hours that Jerry works that day.

Find the percent increase for the given original and new quantities in parts a through c. a. Original quantity: 100 New quantity: 106 b. Original quantity: 10 New quantity: 16 c. Original quantity: 50 New quantity: 56 a.

What is - x^2+12x-32 in standard form?