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Mama L [17]
4 years ago
13

Find f(-5), if f(x) = -x^2 - 2x+1

Mathematics
2 answers:
weeeeeb [17]4 years ago
4 0
Simple as subbin' in -5 for x.
f(-5) = -(-5)² - 2(-5) + 1
= -25 + 10 + 1
= -14
STALIN [3.7K]4 years ago
3 0
F(x) = -x² - 2x + 1

f(-5) = -(-5)² - 2(-5) + 1

f(-5) = -25 + 10 + 1

f(-5) = -15 + 1

f(-5) = -14

-14 <----- answer
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I = $1,200 * 8/100 * 240/360 =
Lisa [10]
<span>The <u>correct answer</u> is:

$64.

Explanation<span>:

We will mulitiply the first two numbers first.

We will first write 1200 as a fraction by putting it over 1:
1200/1 * 8/100.
We now multiply straight across: (1200*8)/(1*100) = 9600/100 = 96.

Now we will multiply this by the last fraction. Again we will make the whole number, 96, a fraction by placing it over 1:
(96/1)*(240/360).

Again we multiply straight across: (96*240)/(1*360)=23040/360.

When we divide this out, we get 64.</span></span>
3 0
3 years ago
Read 2 more answers
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masha68 [24]

Answer:

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Step-by-step explanation:

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3 0
3 years ago
What is -7 2/7 + 6 5/7
Alexandra [31]

Answer:

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Step-by-step explanation:

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3 0
3 years ago
Given f(x) = -4x + 3, find f(-3).
Ket [755]

Answer:

15

Step-by-step explanation:

Replace x with -3

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5 0
4 years ago
If α , β are roots of x2 + 5x + a =0 and 2α + 5β = -1 then α is equal to _____?
ELEN [110]

9514 1404 393

Answer:

  -8

Step-by-step explanation:

If α and β are roots of x^2 +5x +a = 0, then we must have ...

  (x -α)(x -β) = x^2 +5x +a

  x^2 -(α+b)x +αβ = x^2 +5x +a

Then ...

  α + β = -5

Together with the other relation between the roots, we have a system of equations in α and β.

Using the above to write an expression for β, we get ...

  β = -α -5

Substituting this into the given relation, we have an equation for α:

  2α +5(-α -5) = -1

  -3α -25 = -1 . . . . . . eliminate parentheses

  -24 = 3α . . . . . . . . add 3α +1

  -8 = α

The root α is equal to -8.

3 0
4 years ago
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