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3 years ago

Which is an equation of the line with slope -3 and passes through (2,-1)?

Mathematics

2 answers:

Anuta_ua [19.1K]3 years ago

7 0

Answer:

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Here m = - 3, so

y = - 3x + c ← is the partial equation

T find c substitute (2, - 1) into the partial equation

- 1 = - 6 + c ⇒ c = - 1 + 6 = 5

y = - 3x + 5 ← in slope- intercept form

Add 3x to both sides

3x + y = 5 ← in standard form → C

xz_007 [3.2K]3 years ago

7 0

Answer:

C. 3x + y = 5.

Step-by-step explanation:

Using the point-slope form of the equation of a straight line:

y - y1 = m(x - x1) where m = the slope and (x1, y1) is a point on the line.

So substituting we have:

y - (-1) = -3(x - 2)

y + 1 = -3x + 6

y = -3x + 5

3x + y = 5.

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Answer:

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3 years ago

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2 years ago

Read 2 more answers

Dany has a business selling bracelets for 7.50 each. She only has enough material to make 5 bracelets. If x represents the numbe

ziro4ka [17]

Answer:

The range is [0,37.5]

Step-by-step explanation:

We start by writing the equation that links x and y

From the question;

y = 7.5x

Now, she has enough material to make 5 only

When we talk of range, we are referring to the values on the y-axis

So the lowest y value is 0

and since the highest number of bracelets is 5;

The total cost of the 5 is 7.5(5) = 37.5

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2 years ago

Hue is arranging chairs.She can form 6 rows of a given length with 3 chairs left over,or 8 rows of that same length if she gets

Step2247 [10]

Answer:

There are 7 chairs in each row.

Step-by-step explanation:

Hue is arranging some number of chairs. If she arranges them in 6 rows of equal lengths then there will be 3 chairs leftover, or she arranges them in 8 rows of that same length then she requires 11 more chairs.

Let us assume that there are P numbers of chairs and there are x chairs in each row.

Therefore, we can write that

6x + 3 = P ....... (1) and

8x = P + 11

⇒ 8x - 11 = P ........ (2)

Now, from equations (1) and (2) we get,

6x + 3 = 8x - 11

⇒ 2x = 14

⇒ x = 7

Therefore, there are 7 chairs in each row. (Answer)

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3 years ago