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3 years ago

Which is the most likely first step needed to solve this equation? 99x - 15 = 45

Mathematics

1 answer:

netineya [11]3 years ago

3 0

Answer:

the first step wpuld be to subtract 15 from the left side and add it to the right

Step-by-step explanation:

99x-15=45

+15 = +15

99x= 60

99x/60 = 60/60

0.6x

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Answer:

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3 years ago

AB and BC form a right angle at point B if A = (-3,-1) and B = (4,4) what is the equation if BC

sergejj [24]

Answer:

$7x+5y-48=0$

Step-by-step explanation:

Refer the attached figure .

We are given a line AB

Point A $=(x_1,y_1) = (-3,-1)$

Point B $=(x_2,y_2) = (4,4)$

Formula for slope 'm' when two points are given :

$m=\frac{y_2-y_1}{x_2-x_1}$

Substituting thew values

$m=\frac{4-(-1)}{4-(-3)}$

$m=\frac{5}{7}$

Since we are given that AB is perpendicular to BC

So, By property - perpendicular slopes are negative reciprocals of each other.

$\Rightarrow m_1\times m_2 =-1$

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$\Rightarrow m_2 = \frac{-7}{5}$

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Formula of equation of line : $y-y_1=m(x-x_1)$

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$7x+5y-20-28=0$

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Hence the equation of line BC : $7x+5y-48=0$

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Answer:

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Step-by-step explanation:

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