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Mrrafil [7]
3 years ago
13

Which equation represents a line that passes through (4,1/3) and has a slope of 3/4? y – 3/4= 1/3(x – 4)

Mathematics
1 answer:
pogonyaev3 years ago
6 0

Answer:

y – 1/3 = 3/4 (x – 4)

Step-by-step explanation:

The equation of a line is given by  y-y_1=m(x-x_1)

Where

m is the slope, and

(x_1,y_1) is the coordinates of the point given

<em>It is giventhat the slope is 3/4, so m = 3/4. Also, the point is (4, 1/3) so this is (x_1,y_1)</em>

<em />

<em />

Plugging it into the formula, we get:

y-y_1=m(x-x_1)\\y-\frac{1}{3}=\frac{3}{4}(x-4)

Hence, 2nd option is the right answer.

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Alina is building a roof for a dog house. She uses plywood to make the roof with the dimensions shown, but with an open bottom.
mafiozo [28]

Step-by-step explanation:

Alina is building a roof for a dog house with the dimensions shown. She uses plywood to make the roof with the dimensions shown, but with an open bottom.

A net of a square pyramid has a square base with side lengths of 4 feet, and 4 triangular sides with heights of 3 feet.

Find the surface area of the roof.

The area of each triangular face is  

✔ 6

ft2.

The surface area of the roof is  

✔ 24

ft2.

6 0
3 years ago
Help Please: Two boats start their journey from the same point A and travel along directions AC and AD, as shown below: What is
Roman55 [17]

Answer:

  230.9 ft

Step-by-step explanation:

The side ratios of a 30°-60°-90° triangle are 1 : √3 : 2

In ∆ABC, BC = AB/√3 ≈ 115.47 ft

In ∆ABD, BD = AB√3 ≈ 346.41 ft

Then the length CD is ...

  346.41 ft -115.47 ft = 230.94 ft

The distance CD is about 230.9 ft.

8 0
4 years ago
A bag of potatoes weighs 15 pounds. How many kilograms is this?​
Tresset [83]

Answer:

6.8 kg

Step-by-step explanation:

1 pound = 0.4536 kg

15(0.4536) = 6.804

4 0
3 years ago
a quantity of ethanol is cooled from 47.9° C to 12.3°C and releases 3.12 KJ of heat. what is the mass of the ethanol sample?​
victus00 [196]

Answer:

35.9 grams

Step-by-step explanation:

We use the formula:

q=m*C_p*\Delta T

Where

q is heat released

m is mass

C_p is the constant 2.44

ΔT is change in temperature

We put the info in the formula and solve for m (mass):

q=m*C_p*\Delta T\\-3.12 =  m*2.44(12.3-47.9)\\-3.12*10^3=m*(-86.864)\\m=35.9

The mass of ethanol is 35.9 grams

8 0
4 years ago
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Natasha2012 [34]

Answer:

7. 36     8. 1     9. 21

Step-by-step explanation:

You plug in the variables in the equation.

7.5^{2} +-4^{2} = 41

8. (5-4)^{2} = 81

9. 5+4^{2} =21

6 0
3 years ago
Read 2 more answers
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