Answer:
The answer is A.
Step-by-step explanation:
Firstly, you have to take out the common terms for this expression. In this expression, the common terms ard 2 and m :
Next you have to factorise the brackets :
So the final answer is :
Answer:
f(n) = -n^2 -3n +5
Step-by-step explanation:
Suppose the formula is ...
f(n) = an^2 +bn +c
Then we have ...
f(1) = 1 = a(1^2) +b(1) +c
f(2) = -5 = a(2^2) +b(2) +c
f(3) = -13 = a(3^2) +b(3) +c
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Here's a way to solve these equations.
Subtract the first equation from the second:
-6 = 3a +b . . . . . 4th equation
Subtract the second equation from the third:
-8 = 5a +b . . . . . 5th equation
Subtract the fourth equation from the fifth:
-2 = 2a
a = -1
Then substituting into the 4th equation to find b, we have ...
-6 = 3(-1) +b
-3 = b
and ...
1 = -1 +(-3) +c . . . . . substituting "a" and "b" into the first equation
5 = c
The formula is ...
f(n) = -n^2 -3n +5
The value of g from the given proportion is 227.2
<h3>Ratio and proportions</h3>
Fractions are written as a ratio of two integers. For instance a/b is a fraction where a and b are integers.
Given the following proportion shown below;
143/g = 540/858
In order to determine the value of g, we will cross multiply to have:
540g = 143 * 858
Simplify
540g = 122694
Divide both sides by 540
540g/540 = 122694/540
g = 122694/540
g = 227.2
Hence the value of g from the given proportion is 227.2
Learn more on proportion here: brainly.com/question/19994681
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Answer:
x+3y=-27
Step-by-step explanation:
