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vitfil [10]
2 years ago
12

Sally rolled a 6-sided number cube 40 times and it landed on 4 eight times. What is the experimental probability of Sally gettin

g a 4?
Mathematics
1 answer:
Sedbober [7]2 years ago
5 0
P(roll a 4) = 8/40. It is 8/40 because you rolled the a 4 eight times out of the forty tries. Hope this helps!
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Can anyone help me with this question please
klemol [59]

Answer:

  7.  ∠CBD = 100°

  8.  ∠CBD = ∠BCE = 100°; ∠CED = ∠BDE = 80°

Step-by-step explanation:

7. We presume the angles at A are congruent, so that each is 180°/9 = 20°.

Then the congruent base angles of isosceles triangle ABC will be ...

  ∠B = ∠C = (180° -20°)/2 = 80°

The angle of interest, ∠CBD is the supplement of ∠ABC, so is ...

  ∠CBD = 180° -80°

  ∠CBD = 100°

__

8. In the isosceles trapezoid, base angles are congruent, and angles on the same end are supplementary:

  ∠CBD = ∠BCE = 100°

  ∠CED = ∠BDE = 80°

8 0
3 years ago
Can someone explain this to me??? Are you able to see the picture?
Butoxors [25]

Answer:

P' = (3, 0)

Step-by-step explanation:

You are translating the point (x, y) of (5, -5) to the left 2 units and up 5 units.   The x value changes when shifting left or right.  So the x value shifts to the left 2 units, meaning it shifts left on the number line, so it reduces by 2 units. The y value changes when shifting up or down.  So the y value shifts up 5 units, so it increases in value by 5 units

4 0
3 years ago
A city has a population of 310,000 people. Suppose that each year the population grows by 9%. What will the population be after
Leno4ka [110]

Answer: 644,800

Step-by-step explanation:

This can also be solved using the terms of Arithmetic Progressions.

Let the 13 years be number of terms of the sequences (n)

Therefore ;

T₁₃              = a + ( n - 1 )d , where a = 310,000 and d = 9% of 310,000

9% of 310,000 = 9/100 x 310,000

                        = 27,900

so the common difference (d)

                     d = 27,900

Now substitute for the values  in the formula above and calculate

T₁₃              = 310,000 + ( 13 - 1 ) x 27,900

                  = 310,000 + 12 x 27,900

                  = 310,000 + 334,800

                  = 644,800.

The population after 13 years = 644,800.

 

3 0
3 years ago
Can someone help me with this
slega [8]

Answer:

4π

Step-by-step explanation:

This is a sinusoidal function.

The period of the function is basically the length from one wave crest to the next crest. We can take any 2 subsequent crests.

Lets take our first crest to be at 3π

The next one will be at 7π, as we can see

So, the length from one crest to the next is the period, which is:

7π - 3π

= 4π

Third answer choice is right, 4π is the period.

8 0
3 years ago
Find the midpoint of the line segment with the given endpoints.<br> (-3,-7) and (3,0)
Crank
The coordinates of the midpoint:
(\frac{x_1+x_2}{2}, \frac{y_1+y_2}{2})
x₁,y₁ - the coordinates of one endpoint
x₂,y₂ - the coordinates of the other endpoint

(-3,-7) \\&#10;x_1=-3 \\ y_1=-7 \\ \\&#10;(3,0) \\&#10;x_2=3 \\ y_2=0 \\ \\&#10;\frac{x_1+x_2}{2}=\frac{-3+3}{2}=\frac{0}{2}=0 \\ \\&#10;\frac{y_1+y_2}{2}=\frac{-7+0}{2}=\frac{-7}{2}=-3.5 \\ \\&#10;\boxed{(0,-3.5)} - \hbox{the midpoint}
7 0
3 years ago
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