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igor_vitrenko [27]
3 years ago
15

A coin contains 1.25, point grams of nickel and 3.75, point, grams of copper, for a total weight of 5 grams. What percentage of

the metal in the coin is copper?
Mathematics
1 answer:
jarptica [38.1K]3 years ago
8 0

3.75 grams of copper / 5 total grams =

.75 = 75%

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t hits the square dartboard shown below at a random point. Find the probability that the dart lands in the shaded circular regio
masha68 [24]

Given:

Required:

To find the probability that the dart land will be in the shaded region.

Explanation:

Area of the circle is given by the formula:

A=\pi r^2

Where r = radius

Thus the area of the circular region

\begin{gathered} =(3.14)\times(2)^2 \\ =3.14\times4 \\ =12.56\text{ square in.} \end{gathered}

The area of the square is given by the formula:

=(side)^2

Thus the area of the given square

\begin{gathered} =(6)^2 \\ =36\text{ square in.} \end{gathered}

The probability of an event is given by the formula:

P=\frac{number\text{ of possible outcomes}}{Total\text{ number of outcomes}}

The probability that the dart land will be in the shaded region

=\frac{Area\text{ of the shaded region}}{Area\text{ of the square}}

Thus probability

\begin{gathered} P=\frac{12.56}{36} \\ P=0.3488 \\ P=0.349 \end{gathered}

Final answer:

Thus the probability that the dart land will be in the shaded region is 0.349.

6 0
1 year ago
The short sides of a rectangle are 2 inches. The long sides of the same rectangle are three less than a certain number of inches
Georgia [21]
So the “certain number” will be S.
Since 2width + 2length, the first part would be 2 times 2 which is 4
The length is S - 3
We then have to multiply this by 2
So it is 2(S-3) which is 2S-6
So the answer is 4+2S-6 which is 2S-2
8 0
3 years ago
Sketch the triangle in the coordinate plane whose vertices are (0, -2), (2, 3).
Mars2501 [29]
B is the right thing 15 squints
4 0
2 years ago
What is the solution of the equation? (√2x-1) + 2=x
Gwar [14]

Answer:

x = 5

Step-by-step explanation:

√(2x − 1) + 2 = x

√(2x − 1) = x − 2

2x − 1 = (x − 2)²

2x − 1 = x² − 4x + 4

0 = x² − 6x + 5

0 = (x − 1) (x − 5)

x = 1 or 5

Check for extraneous solutions.

√(2(1) − 1) + 2 = 1

√(1) + 2 = 1

3 = 1

No solution

√(2(5) − 1) + 2 = 5

√(9) + 2 = 5

5 = 5

x = 5

7 0
3 years ago
Please help me with these questions I am begging anyone please help
Y_Kistochka [10]

Answer:

1)rs.6000

Step-by-step explanation:

1)30 000*20/100=rs.6000

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5 0
3 years ago
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