How can I calculate the area for polygons

Which phrase can be represented by an equation? twice as much as a number 12 less than a number half of a number is 15 the difference of 20 and a number

at a library book sale, hardcover books sell for $4 and paperbacks sell for $2. The expresstion 4b+2b represents the total cost for b hardcover books and b paperbacks. Write a simpler expression that is equivalent to 4b+2b

Round 8.465 to the nearest hundredth

Which answer choices is a run on sentence? A. John hit the baseball it went over the fence. B. John hit the baseball and it went over the fence. C. John hit the baseball. It went over the fence.

Answer These Questions and show your work to be brainliest 1. what percent of 20 is 40? 2. Dalia saved 3000 last year. she saved 600 in the month of january.

If, in a quadratic equation, the values of a and c have opposite signs, the solutions of the equation are real numbers.

Trevor has four boxes of raisins to share equally among himself and two friends how many boxes of Raisin would each person receive

The largest angle of a triangle measures 60 more degrees than the smallest angle. The middle angle measures 30 more degrees than the smallest. Find the measures of all three angles in the triangle.

Leora is finding the length of a horizontal line segment on a coordinate grid. She subtracted the x coordinates and got - 17.5. What is her next step? Add 17.5. Take the absolute value of - 17.5. Add the y-coordinate values. Round up to - 17.

Given f (x) = 2x^2 8 and g (x) = 5x-6, find each function. (f g) (x) (f*g) (x)