How many two digits numbers can you write using 1 and 2 repeat?

Problem melissa is her dad build a walkway in their backyard. the walkway will be 54 feet long and 1.5 feet wide. the local hardware store sells tiles which are 1.5 by 1.5 feet and come in boxes of 12. how many boxes of tiles do they need?

What describes horizontal cross section of the right rectangle 6m 8m 5m

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers