Answer:
f(60)=280
Step-by-step explanation:
f(x)=0.4x²-36x+1,000
x=60→f(60)=0.4(60)²-36(60)+1,000
f(60)=0.4(3,600)-2,160+1,000
f(60)=1,440-2,160+1,000
f(60)=280
This mean that a driver of 60 years old will have 280 accidents per 50 million miles driven.
Answer:
360,000
Step-by-step explanation:
The exclamation point is factorial:
9! = 9×8×7×6×5×4×3×2×1 = 362880
5! = 5×4×3×2×1 = 120
4! = 4×3×2×1 = 24
362880 - 120× 24 = 360000
Given/equations formed from text:
I: l=w+3
II: A=l*w
III: new area B=(l-2)*w
IV: B=A-30
substitute l in II with I to remove l:
II': A=l*w=
(w+3)*w=
w^2+3w
substitute l in III with I to remove l:
III': B=(l-2)*w=
(w+3-2)*w=
(w+1)*w=
w^2+w
substitute A and B from II' and III' into IV:
B=A-30
w^2+w=w^2+3w-30
30=2w
w=15
insert w=15 into I:
l=15+3=18
->
A) dimensions of full size rectangle are width 15 and length 18
dimensions of reduced size rectangle are width 15 and length 16
B) full size: 15*18=10*18+5*18=180+90=270cm^2
reduced size: 15*16=10*16+5*16=160+80=240cm^2
I believe that the correct answer would be A
Hope this helped love <3
Answer:
AC=7
Step-by-step explanation:
x+5=3x+3
-4x=-2
x=2
Substitute x in.
2+5=7
Hope I helped! Sorry if incorrect.
~Mschmindy
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