Answer:
35% decrease is the answer
Step-by-step explanation:You get this, because if you use the equation 611-940 over 611 multiplied by 100. You do 611-940 because you need to find how much it decreased by, and then you put it over 611, because that was the total and divide, because your finding the percent by dividing the part by whole, and then multiply it by 100 to get your final answer, because 100 is the total of percentages.
a is the answer as the only change is the gradient being halved,
b would be if it was -1/2 and c would be1/2 x+1/2
Answer:
![y=\frac{1}{3}x+2](https://tex.z-dn.net/?f=y%3D%5Cfrac%7B1%7D%7B3%7Dx%2B2)
Step-by-step explanation:
find the slope of the line using ![m=\frac{y_2-y_1}{x_2-x_1}](https://tex.z-dn.net/?f=m%3D%5Cfrac%7By_2-y_1%7D%7Bx_2-x_1%7D)
![m=\frac{3-2}{3-0}](https://tex.z-dn.net/?f=m%3D%5Cfrac%7B3-2%7D%7B3-0%7D)
![m=\frac{1}{3}](https://tex.z-dn.net/?f=m%3D%5Cfrac%7B1%7D%7B3%7D)
slope intercept form is ![y-y_1=m(x-x_1)](https://tex.z-dn.net/?f=y-y_1%3Dm%28x-x_1%29)
use one of the given points to substitute for
and
.
![y-2=\frac{1}{3}(x-0)](https://tex.z-dn.net/?f=y-2%3D%5Cfrac%7B1%7D%7B3%7D%28x-0%29)
simplify
![y-2=\frac{1}{3} x](https://tex.z-dn.net/?f=y-2%3D%5Cfrac%7B1%7D%7B3%7D%20x)
add 2 to both sides
![y=\frac{1}{3}x+2](https://tex.z-dn.net/?f=y%3D%5Cfrac%7B1%7D%7B3%7Dx%2B2)
Answer:
x= - 41/6, y= -6/23
Step-by-step explanation:
2x - 3y= - 1 ...(1)
0.8x - 3.5y=1/5 ...(2)
(2)×10 : 8x - 35y= 2 ... (3)
(1)×4 : 4x-12y= - 4 ...(4)
(3)-(4): 8x-35y=2
8x-12y= -4
_________
- 23y= 6
y= - 6/23
Substitute y= - 6/23 into any equation
Exp : 2x - 3(-6/23) = - 1
2x+18/23 = - 1
2x = - 41/3
x= - 41/6
Answer:
the answer is b) she has 3 cousins
Step-by-step explanation: you divide 20 by 6 and you'll get 3 and well after that only 2 are left over