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Y_Kistochka [10]
2 years ago
9

First he bought five bikes for 20$ each.Later,he bought one chandelier for 80.After that, he found two five dollar bills. Also h

e returned one bike.
Mathematics
1 answer:
Dovator [93]2 years ago
8 0
I think your question is asking how much money he owes. He owes $90
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<img src="https://tex.z-dn.net/?f=81-%28y-1%29%28y%5E2%2B27%29%20%5Cgeq%200%20%5C%5C%5C%5C%2081-%28y%5E3%2B27y-y%5E2-27%29%20%5C
Zarrin [17]
<span>First thing you'll need to know is that the value for this equation is actually an approximation 'and' it is imaginary, so, one method is via brute force method.

You let f(y) equals to that equation, then, find the values for f(y) using values from y=-5 to 5, you just substitute the values in you'll get -393,-296,-225,... till when y=3 is f(y)=-9; y=4 is f(y)=48, so there is a change in </span><span>signs when 'y' went from y=3 to y=4, the answer is between 3 and 4, you can work out a little bit deeper using 3.1, 3.2... You get the point. The value is close to 3.1818...

The other method is using Newton's method, it is similar to this but with a twist because it involves differentiation, so </span>y_{n+1}=y_n-\frac{f(y)}{f'(y)}<span> where 'n' is the number you approximate, like n=0,1,2... etc. f(y) would the equation, and f'(y) is the derivative of f(y), now what you'll need to do is substitute the 'n' values into 'y' to find the approximation.</span>
7 0
3 years ago
A line passes through (-1,7)and(2, 10)
kumpel [21]
Slope
m = (y2-y1)/(x2-x1)
m = (10 - 7)/(2 --1)
m = 3/3
m = 1

To find the equation
y = mx + b
m is slope
y = 1x + b
plug in one of the equations to solve for b
10 = 1(2) + b
10 = 2 + b
subtract 2 from both sides
8 = b

The equation is 
y = 1x + 8
or you can write it as
y = x + 8

Hope this helps
3 0
3 years ago
Abe has 150 t-shirts to sell before the playoffs begin. The table shows the linear relationship between the number of t-shirts r
Papessa [141]

Answer:

Y= -12x + 150

Step-by-step explanation:

1. You do the change in y over the change in x to get the slope.

y1 - y2 / x1 - x2 and you get the slope of -12

2. Making a point-slope form equation

y-y1=m(x-x1)

y-138= -12(x-1)

3. Turning point-slope form equation to slope-intercept

y-138= -12(x-1)

distributive property

y-138=-12x+12

add 138 on both sides

<h2><u> y= -12x+150</u></h2>
4 0
3 years ago
Help me please :( I cant seem to get it right
Kazeer [188]
31 is (1)

3 females out of 5 widowed students, 3/5 = 0.6 which is 60%.

the answer for 30 is 10/30 or 33.3%, which isn't an option
7 0
2 years ago
Is zero a rational number? Can you write it in the form p/q, where p and q are integers and q ≠ 0
fredd [130]

Answer:

yes, 0 is a rational number. zero can be represented as p/q in the form of 0/1, 0/2, 0/3, 0/4…etc. since the number zero divided by any number is equal to zero. **and remember rational numbers are numbers that can be written as fractions**

Step-by-step explanation:

0/1=0

0/2=0

0/3=0

0/1000=0

and so on and so forth

**as you can see any number paired with zero will result in 0 being your final answer**

good luck :)

i hope this helps

have a nice day !!

3 0
2 years ago
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