What is the sum or difference of 1/2 + 1/4, 3/5 - 2/15, 2/3 - 1/4, 1/6 + 4/5, 3/4 - 1/2, 11/15 + 3/10, 7/10 + 2/3, 7/8 - 9/16 and the simplest form of them!

Sundar used linear combination to solve the system of equations shown. he did so by multiplying the first equation by 5 and the second equation by another number to eliminate the y-terms. what number did sundar multiply the second equation by? 2x+9y=41 3x+5y=36

If mary had 320 toy cars and she gave her friend 50 cars and then she gave her brother 72 more cars how much toy cars would mary have left ● explain with proper details

Hassan bought a package of tofu. the temperature of the tofu was 14° celsius when hassan put the package into the freezer. he left the tofu in the freezer until it reached –19° celsius. which expressions explain how to find the change in temperature, in degrees celsius, of the package of tofu? select three that apply.