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Leno4ka [110]
3 years ago
8

4x - 5y = 15 find the slope and y-intercept

Mathematics
1 answer:
Mazyrski [523]3 years ago
6 0

Answer:

slope=4/5

y-intercept = -3

Step-by-step explanation:

first we need to rewrite the expression to

y=mx+b

were b is the y-intercept and m the slope

4x-5y=15\\\\4x-5y+5y=15+5y\\\\4x+0=15+5y\\\\4x=5(3)+5(y)\\\\4x=5(3+y)\\\\\frac{1}{5}*4x= \frac{1}{5}*5(3+y) \\\\\frac{4x}{5}=3+y\\\\\frac{4x}{5} -3=3+y-3\\\\\frac{4x}{5} -3=y+0\\\\y=\frac{4x}{5} -3\\\\y=\frac{4}{5}x-3

so there we have it

m=\frac{4}{5} \\\\b=-3

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almond37 [142]

Answer:

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7 0
2 years ago
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!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
8_murik_8 [283]

Hey!

-----------------------------------------------

Solution:

= -2.1 + 0.3 + -1.7 + -0.4

= -1.8 + -1.7 + -0.4

= -3.5 + -0.4

= -3.9

-----------------------------------------------

Answer:

a) -3.9

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Hope This Helped! Good Luck!

5 0
2 years ago
1. A chord is 22 cm long. It is 60 cm from the center of the circle.
mezya [45]

Answer:

Radius, r = 61 cm

Step-by-step explanation:

According to the attached figure, we have,

Length of chord, AB = 22 cm

Such that, AP = PB = 11 cm

OP = 60 cm

It is required to find the radius of the circle. We know that radius of a circle is perpendicular to chord. So, APO forms a right angled triangle. Using Pythagoras theorem to find the radius of circle. Let it is r. So,

r^2=60^2+11^2\\\\r=61\ cm

So, the radius of the circle is 61 cm.

3 0
3 years ago
What is the measure of cº?<br> A. 7.5°<br> B. 15<br> C. 30°<br> D. 45
mylen [45]

Answer:

x = 15

Step-by-step explanation:

The sum of the angles in a triangle is 180º

3x + 5x + 4x = 180

Combine like terms

12x = 180

Divide both sides by 12

x = 15

C = 5x

C = 5 * 15

C = 75º

6 0
2 years ago
Fred Johnson total insurance premium is 1,200. His employer pays 60% of the total premium. How much does Fred pay?
Gnesinka [82]
We can set up a proportion to find this

60      x
---  = ----
100   1200

then we cross multiply and divide to solve

60 times 1200 is 72000 divided by 100 is 720

now we know his employer pays 720 out of 1200

we subtract to find out how much he pays

1200-720 is 480

fred pays 480
8 0
3 years ago
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