Find how many quarts of 6% butterfat milk and 3% butterfat milk should be mixed to yield 45 quarts of 4% butterfat milk. The mixture should contain ___ quarts of the 6% butterfat milk.

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76

In a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.