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Eva8 [605]
3 years ago
9

Find (f • g)(-1). f(x) = x + 1 g(x) = x^2 + 5x

Mathematics
2 answers:
nydimaria [60]3 years ago
5 0

Answer:

cc

Step-by-step explanation:

c

docker41 [41]3 years ago
3 0

Answer:

0

Step-by-step explanation:

(gf)(x)=(x+1)(x2+5x)

gf(x)=x3+5x2+x2+5x

gf(x)=x3+6x2+5x

gf(-1)=(-1)3+6(-1)2+5(-1)

gf(-1)=-1+6(1)-5

gf(-1)=-1+6-5

gf(-1)=6-6

gf(-1)=0

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3 years ago
Write an equation that is parallel to the line 4x - y = 2 and passes through the point (-2, 3)
sergeinik [125]
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The equation of the desired line is ...
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7 0
4 years ago
A dairy sells $3 and $5 ice creams. In one day they sell 50 ice creams earning a total of $180. How many of each type of ice cre
murzikaleks [220]
We are going to make simultaneous equations.
x will be our $3 ice cream and y will be our $5 ice cream

Equation1 ----            x + y = 50   (the sum of all the ice creams they sell)
Equation 2 ----          3x + 5y = 180  Sum of all the $3 and $5 ice creams is $180
Since we can't solve for both variables we will put one of the variables in terms of the other.
Take x+y=50 and subtract y from both sides.  (I could have done subtracted x - it did not matter).       Now we have x= ₋ y +50  (negative y +50)
Now I am going to take equation 2 and replace the x with -y +50

3 (-y +50) + 5y = 180   
Now I will use the distributive law on the 3 and what's in the parentheses:
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Now I will combine like terms (the -3y and the 5y)
2y + 150 = 180
Now subtract 150 from both sides of the equation
2y = 30
Divide both sides by 2
and get y= 15 They sold 15 ice creams that cost $5 each
Since equation 1  is  x+y=50 we can replace y with 15
x + 15 = 50    Now subtract 15 from both sides  x = 35
Since x represents the $3 ice creams, they sold 35 of those.
Check:
35 X 3 = $105
15 x 5  = +  <u>75
</u>               $180  

8 0
3 years ago
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What are the solution of the equation x^2- 4x -32 = 0 ?show your work and justify each step.
soldier1979 [14.2K]
X^2-4x-32=0

(x+a)(x+b)

x^2-(a+b)x+ab

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ab=-32

a=-b+4
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-b^2+4b=-32
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If b=8, a=-4
If b=-4, a= 8

Plug in a and b to (x+a)(x+b)
x= -4, 8
6 0
3 years ago
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