21. Lee designed a bookshelf with 6 shelves and a frame. Each shelf weighs 12 pounds.
The frame weighs 38 pounds.
Part A: How much do the shelves weigh altogether? Show your work.
Part B: What is the total weight of the shelves and frame? Explain your reasoning,
6 x 12

72 lbs for the shelves alone, and all together the bookshelf weighs 110 lbs.

Step-by-step explanation:

Step 1: Take the weight of the shelves (12 lbs) and multiply it by the number of shelves total (6), giving us the equation: 6x12 lbs =72 lbs.

Step 2: take the total weight of the shelves (72 lbs) and add the weight of the base (38 lbs), giving us the equation 72 lbs+ 38 lbs= 110 lbs all together.

answer: 1, 3 and 5 are correct

step-by-step explanation:

the simplified form is

step-by-step explanation:

we want to simplify the expression,

let us change the middle bar to a normal division sign to obtain,

we multiply the first fraction by the reciprocal of the second fraction to obtain,

we factor to obtain,

we cancel the common factors to get,

we simplify to get,

the correct answer is b