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3 years ago

Points guys the first person to comment gets brainlest 25 points btw

Mathematics

1 answer:

nirvana33 [79]3 years ago

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Wowowowo i want pls thank you

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3. What is f(2) if f(x) = 2x³ - 19x² +28x + 47?<br> O 45<br> O 40<br> O 43<br> O 37

Lesechka [4]

Answer: C: 43

Step-by-step explanation:

As we are calling the function with 2 for x, we can substitute 2 for every x we see in the function and solve.

$f(2)=2(2)^3-19(2)^2+28(2)+47\\=2(8)-19(4)+28(2)+47\\=16-76+56+47\\=43$

Hence, f(2) is 43.

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2 years ago

For what value(s) of k will the function y=6x^2-8x+k have

liubo4ka [24]

Think the answer is a

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3 years ago

A television is identified by the diagonal measurement of the of screen. A television has a 36 inch screen whose height is 22 in

GuDViN [60]

Answer:

28.5 inches.

Step-by-step explanation:

Given: Measurement of diagonal= 36 inch.

Height= 22 inches

Picture attached to show the measurement.

As the screen of televison is measured by diagonal of screen.

∴ Hypotenous= diagonal of screen, which is 36 inches.

Now, using pythagorean theoram to find length of television screen.

$hypotenous^{2} = opposite^{2}+adjacent^{2}$

∴ $36^{2} = 22^{2} + adjacent^{2}$

Here adjacent is the length of television.

⇒ $1296= 484+ length^{2}$

Subtracting both side by 484.

⇒ $length^{2} = 812$

Taking square root on both side

remember: $\sqrt{a^{2} } = a$

∴ $length= \sqrt{812}= 28.495 \approx 28.5$

Hence, length of televison screen is 28.5 inches.

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4 years ago

Harry worked the following hours in a week. What are the average hours worked for these five days?

Yuki888 [10]

Add all of the hours together than divide by 5 should get 40

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