Answer: just turn them into decimals and use a calculator then turn them back into fractions in simplified form
Step-by-step explanation:
Answer:
Point X is 10 units above Point Y or (X,Y-10)=Y
Step-by-step explanation:
Answer:
Step-by-step explanation:
<u>The correct question is:</u> If the first, second and last term of an AP are a,b and 2a respectively, then show that the sum of all terms of an AP is 3ab/2(b-a).
Firstly, as we know that the nth term of an A.P. is given by the following formula;
, where a = first term of AP, d = common difference, n = number of terms in an AP and = last term
Since it is given that the first, second and last term of an AP are a,b and 2a respectively, that means;
first term = a
d = second term - first term = b - a
= 2a
So,
------------- [equation 1]
Now, the formula for the sum to n terms of an AP when the last term is given to us is;
{using equation 1}
Hence proved.
Answer:
x=27
Step-by-step explanation:
3=x/9
9*3=(x/9)*9
27=x
x=27
Multiply by 9 on both sides to get the x by itself because x(1/9)*9=x, and when you do something to one side of the equation you also have to do it to the other side.
Answer:
1770
Step-by-step explanation:
No calculator is needed.
When you fill in the numbers, you get ...
1 = (x/1770)^(-0.8)
The only way the value will be 1 is if the fraction is 1:
x/1770 = 1
The only way the fraction will be 1 is x = 1770.
1770 mg Zn ions per liter will be lethal in 1 minute.
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<em>Check</em>
You know the answer will be slightly more than 1743 from your answer to the second part of the first question.