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galina1969 [7]
3 years ago
13

Please do these, I am so confused. :(

Mathematics
1 answer:
joja [24]3 years ago
5 0

................................

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a box of 8 marbles has 4 red,2 green and 2 blue marbles. If you select one marble, what is the probability that it is a red or b
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your answer should be 0.80

8 0
2 years ago
A solid cylindrical metal is melted and recast into cubes of metal of sides 3cm . The base radius of the initial cylindrical met
Orlov [11]

Answer:

Approximately 809 cubes will be made

Step-by-step explanation:

To calculate the number if cubes to be made, we shall need to calculate the volume of both shapes

The volume of the cubes can be calculated using the formula L^3 = 3 * 3 * 3 = 27 cm^3

For the cylinder, the formula of the volume to use is

V = π * r^2 * h

The radius here is 10.5 cm and the height is 63 cm

V = 22/7 * 10.5^2 * 63 = 21,829.5 cm^3

The number of cubes that can be made is calculated by dividing the volume of the cylinder by that of the cube

That is 21,829.5/27 = 808.5 which is 809 to the nearest whole number

6 0
3 years ago
Solve for X:
galben [10]

Answer:

A. -61/9

Step-by-step explanation:

(7x + 28) + (7x +28) = 5x - 5 . . . . . . . given equation

14x +56 = 5x -5 . . . . . . . . . . . . . . . . . collect terms

9x = -61 . . . . . . . . . . . . . . . . . . . . . . . . subtract 5x+56

x = -61/9 . . . . . . . . . . . . . . . . . . . . . . . . divide by the coefficient of x

4 0
3 years ago
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What is [70+(-30)]+[2+(-9)]+[0.3+(-0.1)]
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\huge\mathfrak{=\;0}

8 0
3 years ago
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5. Count the total number of edges in the<br>2 solid figures. How many edges in all?<br>​
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The answer is 13.

A cuboid has 12 edges. and a cone has one (the base).

The curved part is not counted as an edge.

Hope this helps!

8 0
3 years ago
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