Solve the system osolve the system of equations equations 2x + 3 y equals 40 and - 2 x + 2 y equals 20

The two-way table shows poll results for the number of athletes and non athletes who take the stairs or the elevator at work. Of the people polled, how many take the elevator? Athletes, Stairs 10 Elevator 3 Non Athletes. Stairs 7 Elevator 16

Solve for h C=h+r/2

Given the proportion x/y = 2/5, what ratio completes the equivalent proportion: x/2 = ?/?

The nth term of a quadratic sequence is: n²+2n-4 Work out the first three terms of this sequence.

What is 5 (6p+8) = 30p+7+7

A grain of sand weighs approximately 0.011 grams. There are approximately 7.5 x 10^18 grains of sand in the world. Using scientific notation, calculate approximately how much all the grains of sand in the world weigh (in grams).

the temperature is - 4°f. A high pressure front increases the temperature to 8°f. by how many degrees did the temperature increases?

2[39 / (16-12*4) + (9+6*3*7]

Find the independent and dependent variables y=x2-24x+3

What is the definition of the determinant