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solmaris [256]
3 years ago
13

An artist used silver wire to make a square that has a perimeter of 40 inches. She then used copper wire to make the largest cir

cle that could fit in the square as, shown below.
What is the circumference of the copper circle? Use 3.14 to represent pi.

A. 3.14 inches
B. 31.4 inches
C. 15.7 inches
D. 78.5 inches

Mathematics
1 answer:
Ivan3 years ago
4 0

Answer:

C

Step-by-step explanation:

The side of square will be equal to ciumference of the circle. It is very simple. Now that I told u the key point u could answer the rest.

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A parabola intersects the x-axis at x=3 and x=9 what is the x-coordinate of the parabola's vertex?
KiRa [710]

Here we are given the x intercepts at x=3 and x=9

So let us try to make quadratic equation for this using given information.

We have factors in the form (x-a)(x-b)

where a and b are x intercepts given to us.

So rewriting in factored form:

y=(x-3)(x-9)

Now let us simplify it:

y=x^{2}-12x+27

Let us find the vertex now,

For a quadratic equation of the form:

y=ax^{2}+bx+c

For x coordinate , we have the formula,

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So using this formula for our equation,

x=\frac{-(-12)}{2(1)}

So x = 6

Answer: The x-coordinate of the parabola's vertex is 6.


7 0
3 years ago
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What is 728 divided by 3?
Alekssandra [29.7K]
728 ÷ 3
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3 0
3 years ago
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Camacho is buying a monster truck. The price of the truck is xx dollars, and he also has to pay a 13\%13% monster truck tax.
Maslowich

Answer:

1.13x

Step-by-step explanation:

We have been given that Camacho is buying a monster truck. The price of the truck is x dollars, and he also has to pay a 13% monster truck tax. We are asked to find the total amount paid by Camacho for the monster truck.

The total cost of monster truck would be x plus 13% of x.

\text{The total cost of monster truck}=x+\frac{13}{100}x

\text{The total cost of monster truck}=x+0.13x

\text{The total cost of monster truck}=1.13x

Therefore, Camacho paid 1.13x dollars in total for the truck.

7 0
2 years ago
5.5 + 2.1x + 3.8x – 4.1
lozanna [386]

Answer:

5.9x + 1.4

Step-by-step explanation:

5.5 + 2.1x + 3.8x - 4.1

= 5.9x + 1.4

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2 years ago
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