I'm thinking about 2 numbers. Here are the clues: Clue #1: The sum of the first number and the second number are 8. Clue #2: The difference of
the first number and the second number are 4. What are the numbers?

First number: 6

Second number: 2

Step-by-step explanation:

We can use system of equations to find the 2 numbers. Let's use x for the first number and y for the second number.

x+y=8

We have this equation because the first clue states that the sum of the first and second number is 8.

x-y=4

We have this equation because the second clue states that the difference between the first and second number is 4. Now that we have 2 equations, we can use the elimination method to find x and y.

x+y=8

x-y=4

Let's eliminate y. To eliminate y, you must add the 2 equations so that the y's can subtract each other. If this is confusing, think of it as this: (y+(-y)=0).

2x=12

x=6

Now that we know the value of x, we can plug this back into any of the equations to find y.

6+y=8

y=2

With x and y found, the first number is 6 and the second number is 2.

-2 is the right

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.