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liberstina [14]
2 years ago
15

A) Complete the table of values for x + 2y = 7

Mathematics
2 answers:
lozanna [386]2 years ago
7 0

Answer:

4.5 , 4 , 3.5 , 3 , 2.5 , 2

Step-by-step explanation:

It's really easy

we need to replace value of 'x' in x+2y=7 by the given values and find the value of y and write it in the table

so first the value of x is -2

replacing value of x by -2

x+2y=7

or, -2+2y=7

or, 2y = 7+2

or, y= 9/2

or, y= 4.5

and we do the same process for other values of x and y

Marrrta [24]2 years ago
3 0
The values for y are as follows
4.5, 4, 3.5, 3, 2.5, 2
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Find the missing lengths: LK=15 and KH=9, find KI and HI.
Luda [366]

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KI=11.25 and HI=6.75

Step-by-step explanation:

Consider the below figure attached with this question.

According to Pythagoras Theorem:

base^2+perpendicular^2=hypotenuse^2

Use Pythagoras in triangle HKL

LH^2+KH^2=LK^2

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Taking square root on both sides.

LH=12

Let length of HI be x.

LI = 12+x

Use Pythagoras theorem in ΔKLI,

(KI)^2+15^2=(12+x)^2

(KI)^2+225=x^2+24x+144

(KI)^2=x^2+24x+144-225

(KI)^2=x^2+24x-81...(1)

Use Pythagoras theorem in ΔHKI,

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x^2+81=x^2+24x-81

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KI=\sqrt{126.5625}

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Hence, the measure of KI is 11.25 units.

3 0
3 years ago
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