Answer:

Step-by-step explanation:
So we have the expression:

And we want to evaluate it for x=-2.
So, substitute -2 for x:

Multiply:

Subtract:

The absolute value of a negative is positive. So:

And we're done!
Answer:
Check pdf
Step-by-step explanation:
Since you have a angle number of 23 and you see the tiny square that means it’s equal to 90 up top and add 23 and 90 together and then subtract that by 180 to get all 3 angles in the triangle and then just use that to find the other line that’s 180.
Hi There!
I believe the answer to the first box would be 9x. Then second box would then be 45. The first and second box would be 9x and 45 because there are 9 chairs in each row making the number of chairs total to 45 chairs. The third and final box would be x=5. The third box would equal 5 because when 9 is multiplied by 5, the answer of the equation equals 45.
I hope this helps!