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3 years ago

Identify the errors made in finding the inverse of y = x2 + 12x.

Mathematics

2 answers:

Umnica [9.8K]3 years ago

7 0

The student did not switch both instances of x with y. He should have written x = y2 + 12y.He wrote only the principal square root instead of using the ± sign.The domain is incorrect. For the radicand to be greater than or equal to zero, x must be less than or equal to zero. It should be x < 0.

BabaBlast [244]3 years ago

6 0

The first error was made when the variables were changed, the x in 12x was not changed to y.
The second error was when the square root of -11x was taken, for -11x to be positive x should be less than 0 not greater or equal to 0.

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bazaltina [42]

Answer:

8 $10 notes

Step-by-step explanation:

I started by working it backwards. $93-$3 equals $90. So we have three of our 13 notes. We need ten more. Well the most $10 notes we can have is 8. if we had 8 $10 notes that would give us $80. $90-$80=10. We can take ten and divide it by five so we have 2 $5 notes.

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2 years ago

Roger ran eight laps around a mile track during PE on Monday. Answer each question in the space provided. Part A How many feet d

Gre4nikov [31]

Answer:

A) 10,560 ft. B) 32 more laps.

Step-by-step explanation:

A) Four laps around a track is equal to one mile, and there are 5,280 feet in one mile. If Roger ran eight laps, he ran two miles. Therefore: 5,280 ft. times 2, is equal to 10,560 ft.

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2 years ago

Use the pythagorean theorem to find the missing side. Round your answer to the nearest tenth

Monica [59]

Answer:

x=14.02

Step-by-step explanation:

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2 years ago

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ss7ja [257]

It is asking you to move the right formula with its match.

Formula for a cylinder: π*R^2*H
So the first option goes to the first shape.

Example:
Radius=5
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3.14*5²*10
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Formula for a square: l*w*h
So the 4th option goes with the 2nd shape.

Example: l=5 w=5 h=5
(Length * Width * Hieght)

5*5*5=125 for the answer.

Formula for a cone is: 1/3π*r^2*h
So the second option goes to the 3rd shape.

Example: r=3 h=11
π≈3.14
$\frac{1}{3} *3 ^{2} *11=33$
33 is your answer.

Formula for the pyramid would be: 1/3*b*h
So the 3rd option would go to the 4th shape.

Example:
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Hope this helps!~

(Look at the attachment)

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3 years ago

Read 2 more answers

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Sloan [31]

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3 years ago