If x and y are real numbers such that x>0 and y < 0, then which of the following inequalities must be true? *

C

Step-by-step explanation:

because x>0 that means x has to be positive. Since y<0 y has to be negative. Knowing that, you have a few choices. I chose to plug in a number for the variable. I chose x=2 and y=-4.

here are the steps for how C works:

2/2 - 4 > -4/2 - 4

1 - 4 > -2 - 4

-3 > -6

This statement is true. I use this method a lot for checking my answers.

Hope this helped!

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!