Aline passes through the point (–2, 7) and has a slope of –5. what is the value of a if the point (a, 2) is also on the line? a.–7 b.–1 c.1 d.7

The correct option is B.

Step-by-step explanation:

The slope of a line is constant.

If a line passes through two points then the slope of the line is

It is given that the line passes through (-2,7) and (a,2).

Using the above formula the slope of the line is

It is given that the slope of the line is -5. Substitute m=-5 in the above equation.

On cross multiplication we get

Divide both sides by -5.

Subtract 2 from both the sides.

The value of a is -1. Therefore the correct option is B.

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

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