Question

Evaluate the following expression using the values given. Find 4x − 2y if x = −1 and y = −5

Answer 1

Just plug in -1 for x and -5 for y.
4x - 2y =
4 * (-1) - 2 * (-5)
Now do the two multiplications first, then the subtraction.

Answer 2

this is confusing

Answer 3

What is 4 times negative 1?

Answer 4

-4

Answer 5

good
What is 2 times -5?

Answer 6

-10

Answer 7

good

Answer 8

That means that
4 * (-1) - 2 * (-5)
is the same as
-4 - (-10)
How do you do that subtraction?

Answer 9

Rule of subtraction:
To subtract a number from another number, change the subtraction into addition of the opposite.
For example, 5 - (-6) = 5 minus the opposite of -6, or 6, so
5 - (-6) = 5 + 6

Answer 10

so its -14

Answer 11

-4 - (-10) turns into addition of the opposite:
-4 + 10

Answer 12

6

Answer 13

6?