(85+90+80+100)/4 = 88.75. It's rounds off to 89
Answer:
<-8,-2>
Step-by-step explanation:
Answer:
a)6 hrs
b)faster
Step-by-step explanation:
a) 9*2/3=6
Answer:
(See explanation for further details).
Step-by-step explanation:
C) The linear system is:



After some algebraic handling:



By direct substitution:










D) The parameter values are:
,
, 
E) The quadratic equation is 
Answer:
Let p be the amount invested at 8%. Then the amount invested at 5% would be 30,000-p. So:
.08p+.05(30,000-p)=2100
.03p+1500=2100
.03p=600
p=20,000
$20,000 was invested at 8%; $10,000 was invested at 5%
Step-by-step explanation:
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