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earnstyle [38]
3 years ago
10

What is the value of r if the line that passes through (4,3) and ( -5, r ) has a slope of -1 ?​

Mathematics
1 answer:
wlad13 [49]3 years ago
8 0

Answer:

12

Step-by-step explanation:

The point-slope equation of a line is ...

y = m(x -h) +k

for a line with slope m through point (h, k).

The line with slope -1 through point (4, 3) has the equation ...

y = (-1)(x -4) +3

y = -x +7

Then the value of y for x=-5 is ...

y = -(-5) +7 = 12

The value of r is 12.

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3 years ago
Write an equation of the line passing through the points. Write the equation in general form.
Reika [66]

Answer: y=2x+8

Step-by-step explanation:

(2,12)=(x1,y1)

(-7,-6)=(x2,y2)

(y2-y1)/(x2-x1)=(-6-12)/(-7-2)=-18/-9=2=m

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insert (2,12) to y=2x+b

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4 0
3 years ago
Question 10: Each tablet in a bottle of 30 costs the pharmacy $4.60. The pharmacy has additional costs including supplies and sh
valentinak56 [21]

The pharmacy should charge $201.6 for the entire bottle

Cost price refers the  price the seller bought the product

Selling price refers to the price the seller sells to the consumer.

Profit refers to the money earned by the seller above the cost price

Loss refers to the money paid by the seller above the cost price.

Profit= SP-CP

CP=30X$4.60=$138

TOTAL EXPENSES=$138+30X$1.40

                                = $180

FOR PROFIT OF 12%,the seller must sell in= $180(1+12/100)

                                                                         =$201.6

Therefore,the pharmacy should charge $201.6 for the entire bottle to make a profit of atleast 12%

Learn more about profit and loss,

brainly.com/question/19104371

#SPJ10

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2 years ago
Solve all the questions
maksim [4K]
3. $5.51 your welcome
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4 years ago
Read 2 more answers
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