There are 4 shelves with canned food. each shelf has t cans. then tracy adds 2 cans to only 1 of the shelves. if t=8, how many cans are on the shelves altogether? ;

What is the area of the triangle 10 13 12

He mass of a single atom of carbon can be found by dividing the atomic mass (12.01 g) by 6.022 x 10^23. which is the mass of a single carbon atom, correctly written in scientific notation with the correct number of significant figures?

One number is 4 less than 3 times a second number. if 3 more than two times the first number is decreased by 2 times the second number, the result is 11. use the substitution method. what is the first number?