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3 years ago

Explain how you got your answer please :

Mathematics

1 answer:

liraira [26]3 years ago

3 0

X is the number of hours studied, so replace x with 3 in the equation:

y = 6.8(3) + 60
y = 20.4 + 60
y = 80.4

Round down to 80.

The answer would be A.

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What is the area of the triangle that is 30 m base in the height of 12 m in a straight line of 13

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Answer:

Step-by-step explanation:

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3 years ago

120-3/4y=60 solve for y

navik [9.2K]

120 - 3/4y=60
lowest common multiple=4y
480y-3=240y
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Answer: y=1/80

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To control an infection, a doctor recommends that a patient who weighs 92 pounds be given 320 milligrams of antibiotic. If the a

stich3 [128]

Answer:

480 milligrams.

Step-by-step explanation:

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7 0

3 years ago

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F(x)=-3x-7<br> if f(x)=-61, find x

Mars2501 [29]

Answer:

Step-by-step explanation:

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2 years ago

Find the inverse of the given function.

kodGreya [7K]

For this case we must find the inverse of the following function:

$f (x) = - \frac {1} {2} \sqrt {x + 3}$

We follow the steps below:

Replace f(x) with y:

$y = -\frac {1} {2} \sqrt {x + 3}$

We exchange the variables:

$x = - \frac {1} {2} \sqrt {y + 3}$

We solve for "y":

$- \frac {1} {2} \sqrt {y + 3} = x$

Multiply by -2 on both sides of the equation:

$\sqrt {y + 3} = - 2x$

We raise both sides of the equation to the square to eliminate the radical:

$(\sqrt {y + 3}) ^ 2 = (- 2x) ^ 2\\y + 3 = 4x ^ 2$

We subtract 3 from both sides of the equation:

$y = 4x ^ 2-3$

We change y by f ^ {- 1} (x):

$f ^ {- 1} (x) = 4x ^ 2-3$

Answer: $f ^ {- 1} (x) = 4x ^ 2-3$

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3 years ago

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