Answer:
For part a)
130 = 10/2[2a+(10-1)d]
Simplify, u get
2a + 9d = 26.................(1)
Also U5 = a + (5-1)d = 3a
Simplify, u get
a= 2d...................(2)
Substituting for a in equation 1,
2(2d)+9d= 26
Solving for d, we get
d = 2
In part b) substituting for d in equation 2 to get the first term
a = 2(2) = 4
Part c) the no. of terms required can be obtained by solving
28 = 4+(n-1)2
n = 13
Answer:
The value of log 43is 1.633
Step-by-step explanation:
Explanation:
Suppose you know that:

Then note that:

So

We know that the error is approximately:

So we can confidently give the approximation:

Answer:
Square root of 81 is 9
Step-by-step explanation:
Answer: usdd
Step-by-step explanation:
The original amount Sara has left is 172/209
The calculation can be done as follows
Let y represent the amount left
9/11 × 836
= 7524/11
= 110
Y can be calculated as follows
Y + 38 +110= 836
148 + Y= 836
Y= 836 - 148
Y= 688
Therefore the fraction is
688/836
= 172/209
Hence the fraction of the original amount left is 172/209
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