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3 years ago

write the standard form of the line that contains a slope of -3/8 and passes through the point (5,-4)

1 answer:

6 0

$\bf \begin{array}{ccccccccc}
&&x_1&&y_1\\
&&(~ 5 &,& -4)
\end{array}
\\\\\\
% slope = m
slope = m\implies -\cfrac{3}{8}
\\\\\\
\stackrel{\textit{point-slope form}}{y- y_1= m(x- x_1)}\implies y-(-4)=-\cfrac{3}{8}(x-5)
\\\\\\
y+4=-\cfrac{3}{8}x+\cfrac{15}{8}\implies y=-\cfrac{3}{8}x+\cfrac{15}{8}-4\implies 
y=-\cfrac{3}{8}x-\cfrac{17}{8}$

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Answer:

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Step-by-step explanation:

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Semmy [17]

Answer/Step-by-step explanation:

The basic rule of maths operation used by Sandi, is the PEMDAS Rule.

Maths operations like the one Sandi was given must follow this rule. According to the rule:

P - Parentheses, solve everything you have in the parentheses first.

E - Exponents, do the exponents.

M - Multiplication or

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Let's apply this rule to see if Sandi rightly applied the PEMDAS Rule:

Step 1:

6*4 + 2 ÷ 2 - 7 (given)

Step 2: perform operation involving Multiplication first according to PEMDAS Rule.

24 + 2 ÷ 2 - 7 (multiplication first. I.e. 6*4 = 24)

Step 3: perform division operation next.

24 + 1 - 7 (division operation. i.e. 2÷2 = 1)

Step 4: Subtraction

24 - 6 (i.e. +1 - 7 = -6) this is where Sandi made an error.

Step 5: subtraction

24 - 6 = 18.

Sandi made a mistake in step 4 and 5. Her addition and subtraction operation was wrong. 1 - 7 = -6 not +6.

During operation like this, either subtraction or addition can come first.

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4 years ago

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Answer:

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3 years ago

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Answer:

1. BC=25

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Step-by-step explanation:

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