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Tems11 [23]
3 years ago
11

(1,2)   with a slope of−4/5

Mathematics
1 answer:
Serga [27]3 years ago
8 0
Here, (x₁, y₁) = (1, 2)
m = -4/5

As we already have slope, we need to calculate constant number (c) as follows:
y = mx + c
2 = -4/5 * 1 + c
2 = -4/5 + c
c = 14/5

We know, equation is y = mx + c
y = -4/5x + 14/5        [ The equation in slope-intercept form ]

Now, if you want the equation in point-slope then, it would be:
y - y₁ = m(x - x₁)
y - 2 = -4/5 (x - 1)     [ The equation in point slope form ]

Hope this helps!

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100pts!! Ellis is painting wooden fenceposts before putting them in his yard. They are each 7 feet tall and have a diameter of 1
NeX [460]

Answer:

39.25 cubic feet of paint will be needed by Ellis.

Step-by-step explanation:

Step-by-step explanation:

Volume of a cylinder:

The volume of a cylinder of radius r and height h is given by:

V = \pi r^2h = 3.14r^2h

How much paint will Ellis need to paint all the surfaces of the 10 fenceposts?

This is the combined volume of these 10 fenceposts.

They are each 5 feet tall and have a diameter of 1 foot.

Radius is half the diameter, so r = \frac{1}{2} = 0.5. Also h = 5

10 fenceposts:

Each has the same volume, so:

V = 10(3.14)r^2h = 31.4(0.5)^2(5) = 39.25

39.25 cubic feet of paint will be needed by Ellis.

hope this helps

6 0
2 years ago
Read 2 more answers
Help me solve for q!<br><br> 21 + 3q &lt; 3 (13 - q)<br><br> How do you solve it? Thank you!
Molodets [167]
Good morning

21 + 3q < 3(13 - q)
21+ 3q < 39 - 3q Here it was -3q and it was on the left side. However when you are switching it to another terms that looks like it you must change the sign as well.
3q + 3q < 39 - 21 Here I bring the common terms together.
6q < 18
Divide both sides by 6
6q/6 < 18/6
q < 3
 
8 0
3 years ago
What is the cost of a typewriter that is 18% off the list price of $375 with a sales tax of 5% that must be paid
julsineya [31]

Answer:

The cost is $322.88.

Step-by-step explanation:

18% off the list price of $375

Before the sales tax, you pay 100% - 18% = 82% = 0.82 of 375, so:

0.82*375 = 307.5

5% sales tax:

100% + 5% = 105% = 1.05 of 307.5. So

307.5*1.05 = 322.88

The cost is $322.88.

8 0
2 years ago
3 gallons of paint are used to paint 16 wooden sign how much paint did each sign use? between the two whole numbers does the ans
kkurt [141]
I think you should do it in a decimal idk if im right but in decimal form it is .1875
8 0
3 years ago
A triangle with an area of 60 square inches has a height that is 16 less than 6 times its base.
PtichkaEL [24]

Step-by-step explanation:

the area of a triangle

baseline × height / 2

in our case

baseline × height / 2 = 60 in²

height = 6×baseline - 16

baseline × (6×baseline - 16) / 2 = 60

baseline × (3×baseline - 8) = 60

3×baseline² - 8×baseline = 60

baseline = x

3x² - 8x - 60 = 0

general solution to a quadratic equation is

x = (-b ± sqrt(b² - 4ac))/(2a)

in our case

a = 3

b = -8

c = -60

x = (8 ± sqrt(64 - 4×3×-60))/(2×3) =

= (8 ± sqrt(64 + 720))/6 = (8 ± sqrt(784))/6 =

= (8 ± 28)/6

x1 = (8 + 28)/6 = 36/6 = 6

x2 = (8 - 28)/6 = -20/6 = -10/3

x2 as a negative number is not a valid solution for a length in a geometric shape.

so, x = 6 in is our solution for the baseline.

height = 6x - 16 = 6×6 - 16 = 36 - 16 = 20 in

base = 6 in

5 0
2 years ago
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