4 years ago

Josie is getting her hair cut and

Mathematics

1 answer:

Elanso [62]4 years ago

3 0

Answer:

She should tip $3

Step-by-step explanation:

20% can be written as 0.2

Multiply 15 by 0.2:

15 × 0.2 = 3

She should tip $3

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Answer:

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Step-by-step explanation:

The given quadratic equation is $2x^2-5x+c=0$ .

Comparing this equation to: $ax^2+bx+c=0$ , we have a=2,b=-5.

Where: $x_1+x_2=\frac{5}{2}$ and $x_1x_2=\frac{c}{2}$

The difference in roots is given by:

$x_2-x_1=\sqrt{(x_1+x_2)^2-4x_1x_2}$

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Step-by-step explanation:

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add the 2 angles and equate to 180

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