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matrenka [14]
3 years ago
5

I really need help with this question.

Mathematics
1 answer:
zloy xaker [14]3 years ago
3 0

Answer:

Please check the explanation.

Step-by-step explanation:

Given the points

  • (2, 17)
  • (4, 7)

Finding the slope between (2, 17), (4, 7)

\mathrm{Slope}=\frac{y_2-y_1}{x_2-x_1}

\left(x_1,\:y_1\right)=\left(2,\:17\right),\:\left(x_2,\:y_2\right)=\left(4,\:7\right)

m=\frac{7-17}{4-2}

m=-5

We know the Point-Slope Form of the line equation is

y-y_1=m\left(x-x_1\right)

Here:

  • m is the slope
  • (x₁, y₁) is the point

substituting the values m = -5 and the point (2, 17) in the Point-Slope Form

y-y_1=m\left(x-x_1\right)

y - 17 = -5 (x-2)

Thus, the answer Point-Slope Form is

y - 17 = -5 (x-2)

It can be further simplified to write into the Slope-Intercept Form

y - 17 = -5 (x-2)

y-17 = -5x+10

y = -5x+10+17

y = -5x+27

Thus, the answer in the Slope-Intercept Form (y=mx+b)

y = -5x+27         ∵Slope-Intercept Form → y=mx+b

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The shape of Joy’s room is a rectangle 540 cm long by 250 cm wide.
UNO [17]
<h2><u>Question</u><u>:</u><u>-</u></h2>

The shape of Joy’s room is a rectangle 540 cm long by 250 cm wide.

a. Work out the area of his room in Square meters.

b. How much does he pay to buy flooring for his room where flooring costs $ 40 per square meter

<h2><u>Question</u><u> </u><u>No</u><u>.</u><u> </u><u>a</u></h2>

Work out the area of his room in Square meters.

<h3><u>Given</u><u>:</u><u>-</u></h3>

  • Length of the room 540 cm = 540/100 m = 5.4m
  • Breadth of the room 250cm = 250/100 m = 2.5m

<h3><u>To</u><u> </u><u>Find</u><u>:</u><u>-</u></h3>

  • Area of the room.

<h3><u>Solution</u>:-</h3>

We know that:-

Area of a rectangle = (length × breadth)sq.units

Therefore,

Area of the rectangular room = (5.4 × 2.5) square meters

=> Area of the rectangular room = 13.5 square meters.

<h3><u>Answer</u><u>:</u><u>-</u></h3>

Area of his room is 13.5 square meters.

<h2><u>Question</u><u> </u><u>No</u><u>.</u><u> </u><u>b</u></h2>

How much does he pay to buy flooring for his room where flooring costs $ 40 per square meter

<h3><u>Given</u><u>:</u><u>-</u></h3>

  • Cost in per square meter = $40
  • Area of the room = 13.5 square meters (From question a)

<h3><u>To</u><u> </u><u>Find</u><u>:</u><u>-</u></h3>

  • Total cost of flooring

<h3><u>Solution</u><u>:</u><u>-</u></h3>

Flooring cost in 1 squre meter = $40

Flooring cost in 13.5 square meters = $(40 × 13.5) = $540

<h3><u>Answer</u><u>:</u><u>-</u></h3>

He pays $540 to buy flooring for his room.

<h2>_______________________</h2>

Hope this helps you!! (^_^)

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