What is the result of adding these two equations?

-2x + 7 = - 5

-2x - 4y = 6

At a festival, 2/7 of the number of girls was equal to 3/5 of the number of boys. There were 165 fewer boys then girls, how many children were at the festival in all?

Which fraction is greater 5/8 or 7/10

Which is o 54 converted to a simplified fraction

What is 1.2 divided by 1.44?

Susan's penny bank is 1/10 full. After she adds 240 pennies, it is 2/5 full. How many pennies can Susan's bank hold?

Lindsey sold necklaces to earn money. She earned $125 and put it in a savings account. She earns 5% interest from the bank. If she leaves it in the bank for 2 years, how much will she have in her account at the end of that time?

Evaluate the expression shown for x = 12. Negative StartFraction 5 over 6 EndFraction x + 7

If a wave has a wavelength of 9 meters and a period of 0.006, what is the velocity of the wave?

What is a common factor of 72 and 108

13. The volume of a gas is inversely proportional to the pressure of the gas. If a balloon is filled with 210 cubic inches of a gas at a pressure of 14 pounds per square inch, find the new pressure of the gas if the volume is decreased to 70 cubic