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mel-nik [20]
3 years ago
6

For f(x)=2x + 1 and g(x)= x^2 - 7, find (f + g)(x)

Mathematics
2 answers:
UkoKoshka [18]3 years ago
8 0
The answer to the question

Aleks04 [339]3 years ago
5 0

Answer:

    (f + g)(x) = x² + 2x - 6

Step-by-step explanation:

We have (f + g)(x) = f(x) + g(x)

f(x) = 2x + 1 and g(x) = x² - 7

Substituting

      (f + g)(x) = f(x) + g(x) =   2x + 1 + x² - 7 = x² + 2x +1 -7

       (f + g)(x) = x² + 2x - 6

So we have

    (f + g)(x) = x² + 2x - 6

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The product of two consecutive integers is 5 more than three time the larger. What are the integers?
kvasek [131]
When calculating consecutive integers, the smaller number is x and the larger number is (x + 1).
So the equation you can use is x + (x + 1) = 5 + 3(x + 1)
This is because the sum of the consecutive integers are equal to 5 more than 3 times the larger integer.
Now simplify:
x + (x + 1) = 5 + 3(x + 1)
2x + 1 = 5 + 3(x + 1)
2x + 1 = 5 + 3x + 3
2x + 1 = 3x + 8
Now isolate the variable:
2x + 1 = 3x + 8
Subtract 2x from both sides:
1 = x + 8
Subtract 8 from both side:
-7 = x
x = -7
So the smaller number is -7 and the larger number is -6.

Now check your answer:
-7 + (-7 + 1) = 5 + 3(-7 + 1)
-7 + (-6) = 5 + 3(-7 + 1)
-7 + (-6) = 5 + 3(-7 + 1)
-7 - 6 = 5 + 3(-7 + 1)
-13 = 5 + 3(-7 + 1)
-13 = 5 + 3(-6)
-13 = 5 + (-18)
-13 = 5 - 18
-13 = -13
This works!

So the integers are -7 and -6.
7 0
3 years ago
Help please I really can’t fail this exam
shtirl [24]
Answer:E'F' and EF are equal in length.
7 0
3 years ago
Find the sum of 5x + 6 and -11x - 9
Setler79 [48]
-6x - 3
Step-by-step-explanation:

3 0
3 years ago
Given g(x)= g^-1 (2) would be???
dusya [7]
G(x) is the same as saying y = 

y = (2)
⁻¹             When an exponent is negative it is the same as the inverse of it

y = 1/2¹

y = 1/2
--or--
g(2) = 1/2
4 0
3 years ago
Read 2 more answers
|7m–56|, if m<8 write without using absolute value
Ilia_Sergeevich [38]

Answer:

56-7m

Step-by-step explanation:

l7m–56l m<8

so lets replace m with something smalller then 8, how about 7

so then it would be...

l 7 * 7 - 56 l=

l 49-56 l = l -7 l

but the absulute value of -7 is 7, so how does this help us? well lets see

56-49= 7  this proves that all we have to do is  switch the order giving us the solution 56-7m

hope this helped :)

4 0
3 years ago
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