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Scorpion4ik [409]
2 years ago
6

micaela had $22 to spend on seven notebooks. After buying them she had $1. How much did each notebook cost?

Mathematics
2 answers:
lilavasa [31]2 years ago
7 0
Each book cost $3
22-1= 21 
21/7=3
3x7=21
 

My name is Ann [436]2 years ago
4 0
$22-$1= $21
$21/7 = $3 per notebook
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yarga [219]

Answer:

B; (2,-4)

Step-by-step explanation:

The general equation of a straight line is;

y = mx + b

where m is the slope and b is the y-intercept

So from the question, when we look at the given equation, its slope is -1/2

mathematically, when two lines are perpendicular, the product of their slopes is -1

thus;

m1 * m2 = -1

m2 * -1/2 = -1

-m2 = -2

m2 = 2

The general equation form is;

y-y1 = m(x-x1)

where (x1,y1) = (4,0)

y-0 = 2(x-4)

y = 2x - 8

So, now we look at the point that will work for this equation

For the line that will work, if we substitute its x-value, we get the y-value

Let us take a look at option B

y = 2(2) -8 = 4-8 = -4

we can see that (2,-4) works

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