Let a,b & c be the number of cookies Adrian, Bobby and Calvin baked respectively.
(a+b+c)/3 =138
(a+b)/2 =136
a+b=272
a=272-b
(b+c)/2 =125
b+c=250
c=250-b
Sub a=272-b and c=250-b into (a+b+c)/3 =138,
(a+b+c)/3 =138
[(272-b)+b+(250-b)]/3 = 138
272-b+b+250-b = 414
-b = -108
b=108
From the above,
a=272-b
=272-108
a=164
c=250-b
=250-108
c=142
∵ a=164
b=108
c=142
∴ Adrian baked 164 cookies.
Bobby baked 108 cookies.
Calvin baked 142 cookies.
To get the answer you must go back to the steps you did to get the answer, then change each step to see which is wrong.
The equation for it is...
f-1(x)=-x2-7
You just multiply both sides by -1
Answer:
Step-by-step explanation:
<u>Two-digit multiples of 4 with one digit being 2 are:</u>
- 12, 20, 24, 28, 32, 52, 72, 92
<u>So there are 7 possible options out of 9</u>