Answer:
Step-by-step explanation:
circumference=2πr
2 π r=184.12
π r=92.06
r=92.06/π≈29.30 yards
Answer:
22 songs
Step-by-step explanation:
$50-$10=40
40/1.75=22.8571428571
Answer:
Step-by-step explanation:
<span>f(x)=<span>12<span>4x+2</span></span></span><span>f(−1)=<span>12<span>4(−1)+2</span></span><span>= -6 . The answer is -6 I hoped I helped you! Have a good one!</span></span>
Answer:
13
Step-by-step explanation:
Its calculate the common difference first.
(95-11)/(n-1).
We also have the sum of these n terms is 689.
So we have the following:
11
+(11+(95-11)/(n-1))
+(11+2(95-11)/(n-1))
+...
+(11+(n-1)(95-11)/(n-1))
This can be re-expressed alittle:
There are (n) amount of 11's in the addition... also 1+2+3+...+(n-1)=(n-1)(n)/2.
So we have the sum is
11(n)+n(n-1)/2×(95-11)/(n-1)
But this equal to 689.
We need to solve the following equation:
11(n)+n(n-1)/2×(95-11)/(n-1)=689
The (n-1)'s in second term can cancel.
11(n)+n/2×84=689
11n+42n=689
53n=689
53n=689
n=689/53
n=13