7+d=19 is the answer
subtract 7 from each side d=19-7
d=12
Answer:

Step-by-step explanation:
we have

Applying property of exponents


there are 72 campers at the summer camp because if we just multiply 8 times 9 equals 72
Answer:
Step-by-step explanation:
7√x-9√x+10√2+√2 = √x ( 7 - 9) +√2 ( 10+1) = - 2√x + 11√2
Answer:
The sum will be whichever number has the greater value.
Step-by-step explanation:
Let's say you have (-2) + 4 = ?
The number with the greater value is 4.
So the sum of your answer would be a positive, since the greater number has a positive sign.