All categories

3 years ago

F(x)= −2x^2 + 8x − 10 {Find } f(-4)

Mathematics

1 answer:

MatroZZZ [7]3 years ago

5 0

Answer:

<h2>simply you have to substitute (-4) for all the (x) terms</h2><h2 /><h2>-2x²+8x -10</h2><h2>-2(-4)²+8×(-4)-10</h2><h2>-2(16) - 32 -10</h2><h2>-32 -32 - 10</h2><h2><u>-74</u></h2>

You might be interested in

A college with a graduating class of 4000 students in the year 2010 predicts that its graduating class will grow 5% per year.

anastassius [24]

Hello,

$u_0=4000\\u_1=4000*1.05 (for\ year\ 2011)\\\\u_n=4000*1.05^n\\So:\\year\ 2017: u_7=4000*1.05^7=5628,401690625\ \approx{5628}$

7 0

3 years ago

PLZ HELP 10 PTS!!

solniwko [45]

Answer:

Jill's best friend jumped 8/21 feet further than Jill.

Step-by-step explanation:

we have that

Jill jumped 6 1/3 feet

Jill best friend jumped 6 5/7 feet

To find out how much farther did Jill's best friend jumped, subtract the length that Jill jumped from the length that Jill best friend jumped

$6\frac{5}{7}-6\frac{1}{3}$

but first convert mixed number to improper fraction

$6\frac{5}{7}\ ft=\frac{6*7+5}{7}=\frac{47}{7}\ ft$

$6\frac{1}{3}\ ft=\frac{6*3+1}{3}=\frac{19}{3}\ ft$

substitute the values

$\frac{47}{7}-\frac{19}{3}=\frac{47*3-7*19}{21}=\frac{8}{21}\ ft$

therefore

Jill's best friend jumped 8/21 feet further than Jill.

7 0

4 years ago

Read 2 more answers

1. Find an algebraic representation for an exponential function if it is known that f(x + 1) = 4.f(x)

MrMuchimi

$f(x)=4^{x-1}$ is the algebraic representation for an exponential function

Step-by-step explanation:

Given:

f(x + 1) = 4.f(x)

f(3) = 16

To Find:

Algebraic representation for an exponential function=?

Solution:

From the formula f(x+n) = $4^n$ f(x)

when n= 1, x= 3

f(3+1)= 4(1)f(3)

f(4)= 4f(3)

Substituting the value of f(3)

f(4)= 4f(3)

f(4)= 4 x 16

f(4)= 64

f(4)= $4^2$

f (5) = $4^2$ x 16

f (5) = $4^2$ x $4^2$

f(5)= $4^4$

Similarly,

F(6) = $4^5$

Hence, $f(x)=4^{x-1}$

4 0

4 years ago

7. The value of y varies directly with x, and y = 8 when x = 2.<br> Find y when x = 10.

lesya692 [45]

Y= 40 explanation don’t want to just trust me it’s 40

4 0

3 years ago

Help me please I need helpp

kvv77 [185]

Answer:

172.8 = 32 x 5.40

Step-by-step explanation:

3 0

3 years ago