12a + 6 + 3a = 15a + 2
15a = 15a - 4
0 = - 4
3x92 = 276 (first 3 exams)
average of at least 90 (90 x 4 = 360)
360 - 276 = 84
Answer
<span>she needs to score at least 84 on the fourth exam </span><span>in order to guarantee a final average of at least 90</span>
Left and right side: 6.4*7=44.8
44.8+44.8=89.6
front (where the zipper is) and back: half of 5*8=20
20+20=40
40+89.6=129.6
the area of the bottom is 7*8=56
the total area is 129.6+56=185.6
I am not sure what lateral area includes. To me, the answer should be 129.6, but 129.6 is not a choice.
I'd suggest 185.6, the total surface area.
Answer: ok, ok so..
Step-by-step explanation:
So the total cost for that computer was 179$
you needed 44$ worth of parts, subract you have 135$
divide 135 by 45 you have 3
the labor was 3 hours
44 + 45h = 179
h= hours
h= is also 3 though
...Hope this helped some?
