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3 years ago

Given the value evaluate this functionf(x) = -8x+20; 5-2 [f(-1)]

Mathematics

1 answer:

olga2289 [7]3 years ago

4 0

Answer:

-51

Step-by-step explanation:

f(x) = -8x+20

5 - 2 * f(-1)

First find f(-1)

f(-1) = -8*-1+20 = 8+20 = 28

Then

5 - 2 * 28

5 - 56

-51

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A^-1/[a^-1 - b^-1] + a^-1/[a^-1 + b^-1]

o-na [289]

$\dfrac{a^{-1}}{a^{-1}-b^{-1}}+\dfrac{a^{-1}}{a^{-1}+b^{-1}}=a^{-1}\left(\dfrac{a^{-1}+b^{-1}}{(a^{-1}-b^{-1})(a^{-1}+b^{-1})}+\dfrac{a^{-1}-b^{-1}}{(a^{-1}+b^{-1})(a^{-1}-b^{-1})}\right)$

$=a^{-1}\left(\dfrac{(a^{-1}+b^{-1})+(a^{-1}-b^{-1})}{a^{-2}-b^{-2}}\right)$

$=\dfrac{2a^{-2}}{a^{-2}-b^{-2}}$

$=\dfrac{2b^2}{b^2-a^2}$

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3 years ago

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6.04)The equation of the line of best fit of a scatter plot is y = −8x + 3. What is the the y-intercept? −8 −3 3 8

liberstina [14]

The y-intercept is 3...when plottibg this plot 3 first then use -8x (-8/1) as your slope form your y-intercept going both directions.

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3 years ago

100 POINTS IF U GET THIS RIGHT!

Luda [366]

Answer:

y-intercept: 5/3

Step-by-step explanation:

Our equation: y = mx + b

Given equation: y = -8/3 + 5/3

=> Now, let's compare.

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Hoped this helped.

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3 years ago

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Goryan [66]

Answer:

Step-by-step explanation:

The given expression is

$\frac{2^{\frac{11}{2} }\times 2^{-7}\times 2^{-5}}{2^3\times 2^{\frac{1}{2} }\times 2^{-10}}$

Recall and use

$a^m\times a^n=a^{m+n}$

$\frac{2^{\frac{11}{2} -7-5}}{ 2^{3+\frac{1}{2} -10}}$

$\frac{2^{-\frac{13}{2}}}{ 2^{-\frac{13}{2}}}$

Same bases are dividing, so we write one base and subtract the exponent.

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3 years ago

30. The table below shows the number of ants in an ant farm on different

Nitella [24]

Answer:

a)10

b)5120

Step-by-step explanation:

Given that number of ants double after every ten days, form a table that shows numbe of ants from day 1 to day 91

Day Number of Ants

1 10

11 20

21 40

31 80

41 160

51 320-----------------given

61 640------------------given

71 1280----------------given

81 2560

91 5120

Using the given values for number of ants and the number of days, you can notice the trend for values of days and number of ants.After every ten days, number of ants doubles.Using this information, you can navigate backwards up to day 1 and forward up to day 91

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4 years ago

Given the value evaluate this functionf(x) = -8x+20; 5-2 [f(-1)]​

Given the value evaluate this functionf(x) = -8x+20; 5-2 [f(-1)]