Answer:
5x+7
Step-by-step explanation:
Subtract like terms
(8x+9)-(3x+2)
8x-3x=5x
9-2=7
5x+7 should be your answer I believe
7.8×10^5=since exponent is positive 5. You move the decimal 7.8 five places to the right to be
780000
Answer:
-2
Step-by-step explanation:
(-6-4)/-5=
-10/5= -2
Answer:
$37.50
Step-by-step explanation:
Let beginning amount of money be
"s" for Sorin
and
"j" for Joel
The ratio is 4:7, so we can write:
Also,
After sorin GOT 50 MORE, the ratio became 8:7, so we can write:
Let's cross multiply 1st equation and find an expression for "j":
Now, we put this into 2nd and solve for s:
Cross multiply and solve for s:
So, "j" would be:
Sorin's allowance is $50
Joel's allowance is $87.50
Joel had 87.50 - 50 = $37.50 more than Sorin