What is the probability that a student, chose at random, does not study chemistry?

20/41

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65% chance that a student who doesnt study chemistry is chosen

Step-by-step explanation:

Total amount of students = 20

8 study chemistry

7 Study bio

5 study physics

8+5=13

Probability= 13 / 20 = 65/100

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a

c.

step-by-step explanation:

substitution for (0,1)

y=x^2+4x+1

1=0^2+4(x)0+1

1=0+4(x)0+1

1=4(x)0+1

1=0+1

1=1

substitution for (-3,-2)

y=x+1

-2=-3+1

-2=-2