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taurus [48]
3 years ago
5

A student evaluated −4 + (−9 12) and got an answer of 5 1/2. What might the student have done wrong?

Mathematics
1 answer:
777dan777 [17]3 years ago
3 0

Answer:

The student added +4 instead of -4 so instead of getting -13 1/2 they got 5 1/2 somehow since even if they did that it should be -5 1/2.

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Step-by-step explanation:

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Which of these statements is true
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Answer:

B:  The y-intercept is (0,2).

Step-by-step explanation:

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. A triangle has vertices on a coordinate grid at points J(-1, 5), K(4, 5), and L(4, -2). What is the length, in units, of ?
Neko [114]

Answer:

20.6

Step-by-step explanation:

Given data

J(-1, 5)

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L(4, -2)

Required

The perimeter of the traingle

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J(-1, 5) amd

K(4, 5)

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d=√((x_2-x_1)²+(y_2-y_1)²)

substitute

d=√((4+1)²+(5-5)²)

d=√5²

d= √25

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Let us find the distance between the vertices

K(4, 5), and

L(4, -2)

The expression for the distance between two coordinates is given as

d=√((x_2-x_1)²+(y_2-y_1)²)

substitute

d=√((4-4)²+(-2-5)²)

d=√-7²

d= √49

d= 7

Let us find the distance between the vertices

L(4, -2) and

J(-1, 5)

The expression for the distance between two coordinates is given as

d=√((x_2-x_1)²+(y_2-y_1)²)

substitute

d=√((-1-4)²+(5+2)²)

d=√-5²+7²

d= √25+49

d=  √74

d=8.6

Hence the total length of the triangle is

=5+7+8.6

=20.6

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3 years ago
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Answer:

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Step-by-step explanation:

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