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nasty-shy [4]
2 years ago
5

F(x)=-2x²+x-5 Find f(-6)

Mathematics
1 answer:
FinnZ [79.3K]2 years ago
7 0

Answer:

-83

Step-by-step explanation:

To find f(-6), simply substitute -6 for x in -2x²+x-5:

\displaystyle-2x^2+x-5\vert_{x=-6}\\\implies-2(36)-6-5=\boxed{-83}

You might be interested in
(-12,-5);slope =1/3 write in slope -intercept form​
leonid [27]

Answer:

y = \frac{1}{3} - 1

Step-by-step explanation:

y - y1 = m (x - x1)

y + 5 = \frac{1}{3} (x + 12)

y + 5 = \frac{1}{3} x + \frac{12}{3}

y + 5 = \frac{1}{3} x + 4

y = \frac{1}{3} x - 1

Hope this was helpful :)

7 0
3 years ago
Read 2 more answers
suppose that you put $2,500 into retirement account that grows with an interest rate of 5.25 % compounded once each year after h
Jlenok [28]
You will need to use this formula:
<span>Years = {log(total) -log(Principal)} ÷ log(1 + rate)
Years = [log(15,000) - log(2,500)] / log (1.0525)
</span>
<span> <span> <span> 4.1760912591 </span> </span> </span> - <span> <span> <span> 3.3979400087 </span> </span> </span> / <span> <span> <span> 0.0222221045 </span> </span> </span> =
<span> <span> <span> 0.7781512504 </span> </span> </span> / <span> <span> <span> 0.0222221045 =
</span></span></span>
<span> <span> <span> 35.0169917705 </span> </span> </span> years
About 35 years

You'll find the formula here: http://www.1728.org/compint2.htm
And a compound interest calculator here: http://www.1728.org/compint.htm
(You'll find both are helpful for this problem).

8 0
3 years ago
Riley makes a mistake in step 2 while doing her homework. what was her mistake? startfraction x over x squared minus 5 x 6 endfr
maw [93]

The mathematical mistake that Riley made is that:
"She used the wrong common denominator." (Option A)

<h3>What is a Common Denominator?</h3>

A common denominator is a factor that is similar to all the fractions in the sequence of equations.

Hence the correct answer is:

(2(2x² - 6x + 9))/((x-3) (x-2) (x+3))

See the correct sequence of steps below:

Step One - the Expression is given as:

(x/(x-3)(x-2)) + (3/(x+3))

Step 2 - Find the common denominator and rewrite the expression so that the numerators are above the common denominators.

Hence we have:  (x (x+3) + 3(x-3) (x-2))/(x-3)(x-2)(x+3)

Step 3  Apply the Law of Multiplicative Distribution:

Hence we have  (x² +3x+3x²-9x-6x+16)/(x-3)(x-2)(x+3)

Step 4 -  Collect Like Items

This gives us: (x²+3x²)+(3x-9x-6x)+18/(x-3)(x-2)(x+3)

Step 5 Sort for like coefficients

This gives us:  ((1+3)x² +(3-9-6) * x + 18)/(x-3)(x-2)(x+3)

Step 6 -  check for the sum or difference

This gives us: (4x²+(3-9-6) * x+ 18)/(x-3)(x-2)(x+3)

We simplify and factor the expression to get

(2(2x²-6x+6)/(x-3)(x-2)(x+3).

See the attached for full question.

Learn more about Common Denominators at:

brainly.com/question/542317

4 0
2 years ago
Solve for r -3=7r+10​
Andre45 [30]

Answer:r=7

Step-by-step explanation:

because im stupid

6 0
3 years ago
Suppose you deposit $2,000 in savings account that pays interest at an annual rate of 4%. If no money is added or withdrawn, det
GarryVolchara [31]
Using I = PRT

$2500 - $2000 = $2000 × 0.04 × t

$500 = 80t

t = $500 ÷ 80
t = 6.25 years

so the answer is 6
7 0
3 years ago
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