Answer:
y = (4/5)x - 3
Step-by-step explanation:
slope intercept form: y = mx + b
Note the equal sign, what you do to one side, you do to the other. First, subtract 4x from both sides:
4x - 5y = 15
4x (-4x) - 5y = 15 (-4x)
-5y = -4x + 15
Next, divide -5 from both sides:
(-5y)/-5 = (-4x + 15)/-5
y = (-4x + 15)/-5
Simplify Divide -5 from all terms within the parenthesis:
y = (4/5)x - 3
y = (4/5)x - 3 is your answer.
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The area of your circle is about 500.88
Some backround info needed:
Formula for circumference: C=2(3.14)(r)
Formula for area of circle: A=3.14(r^2)
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First, you need to find the radius of the circle.
Do this by dividing pi and 2 from 79.3.
79.3 / 2 = 39.65
39.65 / 3.14 = about 12.63
The radious of the cirlce is 12.63.
Now find the area:
a = 3.14(12.63^2)
12.63 x 12.63 = about 159.51
159.51 x 3.14 = 500.883066
Round .883 to .88
I hope this helps you
1)
y=6
x^2+6^2=25
x^2=25-36
x^2= -9
x^2=i^2.9
x=3i there's no real solution
2)
x^2+(2x-2)^2=25
x^2+4x^2-8x+4=25
5x^2-8x=21
5x^2-8x-21=0
5x +7
x -3
(5x+7)(x-3)=0
x= -7/5
x=3
Answer:
22 months
Step-by-step explanation:
variable x = number of months
800 + 100x = 3000
isolate the variable x
100x = 3000 - 800
100x = 2200
x = 2200 ÷ 100
x = 22
