19. Mr Ong bought a total of 156 pens and pencils. The ratio of the number of pens to the number of pencils he bought was 4:9. Each pen cost $2. How
much did Mr Ong pay for the pens?​

x^6

step-by-step explanation:

this is correct because:

x-6=0

0*x=0

so

x^6

the difference between a number and 5 is -2.

step-by-step explanation:

notice that the equation you are given has -2 (negative 2) on the right side, not 2. when you subtract 5 from a number n, you are finding the difference between the number and 5.

the difference between a number and 5 is -2.

the argument of alfred t. mahan, henry cabot lodge, and albert j. beveridge was the economically and mass production the the americans could not consume themselves. this led expansion to sell to other foreign nations for profits.

step-by-step explanation:

this is my explanation