Two spinners are spun 20 times. A sum of 7 is landed on 5 times. What is the experimental probability of spinning a sum of 7?

Mathematics

1 answer:

statuscvo [17]3 years ago

8 0

7/20 is the probability

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2x^2 -7= 74 please show all work

skad [1K]

$2x^2-7=74\\
2x^2=81\\
x^2=\dfrac{81}{2}\\
x=-\sqrt{\dfrac{81}{2}} \vee x=\sqrt{\dfrac{81}{2}}\\
x=-\dfrac{9}{\sqrt2} \vee x=\dfrac{9}{\sqrt2}}\\
x=-\dfrac{9\sqrt2}{2} \vee x=\dfrac{9\sqrt2}{2}}\\$

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3 years ago

A 30° central angle in a circle is equivalent to π/6 radians. Drag a tule to each box to correctly complete the sentence.

pav-90 [236]

Answer:

The answers are in the picture

Step-by-step explanation:

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2 years ago

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adoni [48]

Answer:

120 degrees.

Step-by-step explanation:

All the angles in a triangle add up to 180. You have two of the angles given:

50 degrees and 70 degrees

To find the third angle of the triangle (BAC), use the expression:

180 - (50 + 70)

180 - 120

So, the third angle in the triangle is 60 degrees. Looking at angle DAB, you can see that it forms a straight line with angle BAC. A straight line is 180 degrees. Since we know BAC is 60, and BAC + DAB = 180, by doing 180 - 60, you can see that angle DAB is 120 degrees.

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2 years ago

If you roll a six-sided die, what is the probability you will obtain greater than a 2?

Delvig [45]

If we will roll a fair die then the outcomes wil be 1,2,3,4,5,6.

Hence, the total number of events= 6

3,4,5 and 6 are greater than 2.

So, there's 4 events which are greater than 2.

Now the formula to find the probability is:

probability= $\frac{Number of events more than 2}{Total number of events.}$