Answer:
(1) 2π - x² = 0 (2) x = 2.5 cm (3) perimeter = 10 cm
Step-by-step explanation:
(1)The area of the circular coin without the inner square removed is πr² where r = 3 cm is the radius of the coin. So, the area of the coin without the inner square removed is πr² = π(3 cm)² = 9π cm²
The area of the square of x sides removed from its center is x².
The area A of the each face of the coin is thus A = 9π - x²
Since the area of each face of the coin A = 7π cm²,
then
7π = 9π - x²
9π - 7π - x² = 0
2π - x² = 0
(2) Solve the equation 2π - x² = 0
2π - x² = 0
x² = 2π
x = ±√(2π)
x = ± 2.51 cm
Since x cannot be negative, we take the positive answer.
So, x = 2.51 cm
≅ 2.5 cm
(3) Find the perimeter of the square
The perimeter of the square, p is given by p = 4x
p = 4 × 2.51 cm
= 10.04 cm
≅ 10 cm
Answer:
When you barter, you must trade it for something else in order to buy something.
Step-by-step explanation:
Nevermind i see it. one sec
Answer:
The copy machine makes 32 copies per minute.
Step-by-step explanation:
Given that a copy machine makes 136 copies in 4 minutes and 15 seconds, to determine how many copies does it make per minute, the following calculation must be performed:
15 seconds = 0.25 minutes
136 / 4.25 = X
32 = X
Therefore, the copy machine makes 32 copies per minute.
Answer:
See explanation for answer.
Step-by-step explanation:
xy −3y(x−4z)
=xy + −3xy + 12yz
=xy + −3xy + 12yz
= (xy+−3xy) + (12yz)
=−2xy + 12yz
Answer:
= −2xy + 12yz
I'm sorry if this is incorrect.
I hope I helped!
Have a lovely day!
Side note:
I don't completely know what algebraic process is so I just solved it like I
would with a regular equation. If that's even what this is. If you have the
time then please tell me if I answered your question and if I didn't then
please tell me what I did wrong.
