Answer:
<u>The number is 170</u>
Step-by-step explanation:
Let's solve for x, this way:
x = A number that decreased by 20% of itself, the result is 136
20% = 0.2
x - 0.2x = 136 (Like terms)
0.8x = 136
x = 136/0.8 (Dividing by 0.8 at both sides)
x = 170
Let's prove that x = 170 is correct
170 - 0.2 (170) = 136
170 - 34 = 136
136 = 136
We proved that x = 170 is correct
2b^2+9
when b=3
First we have to replace b by the number giving
2(3^2)+9
(2)(9)+9
18+9
= 27
I hope that's help !
Answer:
23 meters
Step-by-step explanation:
You would subtract 24 from 70, and then divide by two.
70-24=46
46/2 = 23
Divide 3324 by 2826.
You will get the decimal 1.17622 etc.
round to the nearest thousandths place 1.18%
there are 17 kids and 12 adults 17x8=136 12x12= 144 136+144=280