163
The two numbers that add to give you 18 and multiply to give you 40 are 10 and 8. This is because 10 + 8 = 18 and 10 x 8 = 80. However, if the question is referring to two numbers that add to 18 and multiply to 40, the correct pair would be 5 and 8, as 5 + 8 = 13 and 5 x 8 = 40.
You multiply them.
The first 12 are: 60, 120, 180, 240, 300, 360, 420, 480, 540, 600, 660 . . .
2 and 4
104
113
120
-134
154
The factors that multiply to 120 and add up to -8 are -12 and 10. This is because when you multiply -12 and 10, you get -120, and when you add them together, you get -8. Thus, the pair of factors you are looking for is (-12, 10).
120
-1 and -120
154
Multiply each one by each of the others (separately), add them together and multiply by 2. 140*120=16800 140*4=560 120*4=480 16800+560+480=17840 17840*2=35680 units squared
-6 and -20
You could multiply the 146 by 2 to give 292 and as 20 is 10 tens 2, just add a zero at the end of that, to give 2920.
you can multiply by 2, or add 120, or divide by 1/2. I'd say it's best to multiply, or find the "product."