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Mrac [35]
3 years ago
14

If you roll a number cube 30 times, how many times do you expect to roll a five

Mathematics
1 answer:
andrezito [222]3 years ago
5 0

Answer:

5

Step-by-step explanation:

There are 6 numbers on a die, one of them is 5 so we expect to get a five one of six times

P (5) = 1/6

If we roll the die 30 times, we expect to get a five 30 * 1/6 = 5 times

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Please help me!! How do you factor this???<br> 16x^5+12xy-9y^5
Aleksandr [31]
First simplifying step by step.

<span>16x^5+12xy-9y^5

Answer is = </span><span><span><span>16<span>x^5</span></span>+<span><span>12x</span>y</span></span>+</span>−<span>9<span>y<span>5

It will help you.
</span></span></span>
7 0
3 years ago
Steffie makes a scale drawing for a crate with a scale factor of 1 to 3 the dimensions of her scale drawing are 15 inches long b
Evgen [1.6K]

Answer:

The length is 5 inches and the width is 4 inches

Step-by-step explanation:

Steffie makes a scale drawing for a crate with a scale factor of 1:3. The dimensions of her scale drawing are 15 inches long by 12 inches wide. The builder creates a scale drawing of the crate with a scale factor of 1:9. What are the dimensions of the builder's scale drawing? A. The length is 4 inches and the width is 5 inches B. The length is 45 inches and the width is 36 inches. C. The length is 5 inches and the width is 4 inches. D. The length is 36 inches and the width is 45 inches

A scale drawing is a reduced form in terms of dimensions of an original image / building / object

the scale drawing is usually reduced at a constant dimension

scale of the drawing = original dimensions / dimensions of the scale drawing

dimensions of the image steffie scaled = (15 x 3) by (12 x 3) = 45 by 36

Builders scaled image = (45 / 9) by (36 /9) = 5 by 4

8 0
3 years ago
Can anyone please help
shusha [124]

\text{Hi there! :)}

\large\boxed{f'(2) = -\frac{16}{27} }

f'(x) = \frac{(5 + x^{2} )(-2x) - (7 - x^{2} )(2x)}{(5+x^{2})^{2}  } \\\\f'(x) = \frac{-10x-2x^{3}- 14x + 2x^{3} }{(5+x^{2})^{2} } \\\\f'(x) = \frac{-24x}{(5+x^{2})^{2}  }\\\\ \text{Solve for the derivative at f'(2) using substitution:}\\\\f'(2) = \frac{-24(2)}{(5+2^{2})^{2}   } \\\\f'(2) = \frac{-48}{81} \\\\\text{Simplify:}\\\\f'(2) = -\frac{16}{27}

8 0
3 years ago
Read 2 more answers
What is the area of a triangle that has a base of 15 1/4 in. and a height of 18in.
WARRIOR [948]

Answer:

137.25 inch ²

Area of triangle = 1/2× base × height

= 1/2×15.25×18

= 15.25×9

=137.25 inch²

8 0
3 years ago
Can someone help me with these problems?
denis23 [38]
I can number 1 is well I mean I’m learning this too but I suck at it so...sorry I can’t help but I can help with other stuff like social studies, science, and spelling
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3 years ago
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