By factoring what is the answer and steps to the equation:
3r^2+8r-3=0

Simplifying

3r2 + 8r + -3 = 0

Reorder the terms:

-3 + 8r + 3r2 = 0

Solving

-3 + 8r + 3r2 = 0

Solving for variable 'r'.

Factor a trinomial.

(-3 + -1r)(1 + -3r) = 0

Subproblem 1

Set the factor '(-3 + -1r)' equal to zero and attempt to solve:

Simplifying

-3 + -1r = 0

Solving

-3 + -1r = 0

Move all terms containing r to the left, all other terms to the right.

Add '3' to each side of the equation.

-3 + 3 + -1r = 0 + 3

Combine like terms: -3 + 3 = 0

0 + -1r = 0 + 3

-1r = 0 + 3

Combine like terms: 0 + 3 = 3

-1r = 3

Divide each side by '-1'.

r = -3

Simplifying

r = -3

Subproblem 2

Set the factor '(1 + -3r)' equal to zero and attempt to solve:

Simplifying

1 + -3r = 0

Solving

1 + -3r = 0

Move all terms containing r to the left, all other terms to the right.

Add '-1' to each side of the equation.

1 + -1 + -3r = 0 + -1

Combine like terms: 1 + -1 = 0

0 + -3r = 0 + -1

-3r = 0 + -1

Combine like terms: 0 + -1 = -1

-3r = -1

Divide each side by '-3'.

r = 0.3333333333

Simplifying

r = 0.3333333333

Solution

r = {-3, 0.3333333333}

Step-by-step explanation:

The answer is on top!! :)

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

happy to

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