Maths question any for another maths questions i just don't get what to do you ❤

Mario is constructing a frame for 10 in. by 8 in. photo. he wants the frame to be the same with all the way around in the same area of the frame and photo to be 120 square inches what is the dimension of the frame?

Complete the conditional statement. if a + 2 < b + 3, then a < b b < a a – b < 1 a < b + 1

Using only the digits 5, 6, 7, 8, how many different three digit numbers can be formed if no digit is repeated in a number?