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Experimental probability that in a group of 4 students, at least one of them has hazel eyes is 85%.

What is experimental probability?

The experimental probability of an event occurring is the number of times that it occurred when the experiment was conducted as a fraction of the total number of times the experiment was conducted.

According to the question

In a school, 30% of the students have hazel eyes.

The number of hazel eyes in data is 17

The total number of data sets are 20.

Experimental probability = × 100%

= 85%

Hence, experimental probability that in a group of 4 students, at least one of them has hazel eyes is 85%.

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Answer:

90%

Step-by-step explanation:

Answer:

Part A: Equation 7n+6

Part B: The sum of three plus eight multiplied by a number.

Step-by-step explanation:

6 more= add 6

7 times a number

number=n

7n+6

sum= the result of adding two or more numbers

Answer:

Part A: Write an algebraic expression for 6 more than 7 times a number. 7n+6

Part B: Write a verbal expression for 3(n + 8).The sum of three plus eight multiplied by a number

Step-by-step explanation:

Answer:

q=35

Step-by-step explanation:

x2 - 12x + q = 0

Let the two roots be r and r+2.

Factor the quadratic expression:

(x - r)[x - (r + 2)] = 0

Expand, simplify, group like terms, and get

x2 - 2(r + 1)x + r(r + 2) = 0

Compare to

x2 - 12x + q = 0

and set equal the coefficients of like terms:

Coefficient of x:

-2(r + 1) = -12 ⇒ r + 1 = 6 ⇒ r = 5

(Then the other root is r + 2 = 5 + 2 = 7)

Constant term:

r(r + 2) = q ⇒ 5(5 + 2) = q

q = 35

Test the solution:

(x - 5)(x - 7) = x2 - 12x + 35

With two roots differing by 2, you get an equation of the form

x2 - 12x + q = 0

with q = 35.