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sladkih [1.3K]
3 years ago
12

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>

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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
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