How do yo to adding and subtracting with unlike denominators

How to solve (168:7) 3^2-4^3

A member of congress is interested in whether her constituents favor a proposed gun-control bill. Her staff reports that 361 letters on the bill have been received and 323 of these oppose the bill. This is an (example of: A. A convenience sample B.

If a Food Bank gives away 281 cans of corn, 172 cans of peas, and 572 cans of carrots, how much did they give away in all? (This is just a random question I thought of so it's fine if you get it wrong.)

What is the result of converting 6 inches into centimeters? Remember that 1 inch = 2.54 centimeters.

What does x equal in 5 (x-2=-13

Mercury melts at 38 below zero. write this temperature as an integer

Which hundredths is 8.275 between

Nasser invested $550 at 6% simple interest for 5 years. What was his investment worth after 5 years? O A. $583 B. $715 C. $883 D. $905

Paco needs at least 3/8 yard of twine to build a model ship. How much twine could he buy? a. 3/10 yard, b. 1/4 yard c. 3/5 yard d. 1/8 yard.

Evaluate the expression - 3x+4 when x = - 5