Answer:
11/2
Step-by-step explanation:
Multiply by 2/2 to remove the decimal.
(a−b)+a+(a+b)=45
⟹3a=45
a=15
a(a+b)=300
⟹15(15+b)=300
⟹225+15b=300
⟹15b=300−225
⟹15b15=7515
b=5
a−b=10⟹a=15⟹a+b=20
The three numbers are 10, 15, and 20.
Proof:
10+15+20=45✓
Answer:
-6
Step-by-step explanation:
-30/5 = 5x/5 -----> -30 divided by 5 is equal to -6
Answer:
Distance: 12.04159458 or 12.0
Midpoint: (2.5, 1)
Step-by-step explanation:
I used the Distance and the Midpoint Formulas.
7. She is not correct. The simplification of this expression is 22a-32.
8. She is correct. The simplification of this expression is 4a-10.
The last one is tricky because I honestly do not know how to do it but you can google It.
I hope that it helped some though