Answer:
1 cookie = $1.25 1 cake = $15
Step-by-step explanation:
set up a system of equations:
let x = 1 cookie
let y = 1 cake
3x + 5y = 78.75
8x + 2y = 40
I multiplied the first equation by 2 to get: 6x + 10y = 157.50
I multiplied the second equation by -5 to get: -40x - 10y = -200.00
If you add both equations, the y-terms will be eliminated
-34x = -42.50
x = 1.25
Plug in 1.25 into equation to find value of y: 8(1.25) + 2y = 40
10 + 2y = 40
2y = 30
y = 15
In these problems, it is always a good idea to find the total population. In this case, it would be the total number of people who went on the field trip.
28+18+4=50
There are 50 people total.
To find each fraction, just put the number of students/parents/teachers over 50 and simplify.
Students
28/50=14/25
Parents
18/50=9/25
Teachers
4/50=2/25
Hope this helps!
Answer: y = -2
Step-by-step explanation: Because the line is horizontal, the slope is 0. So on a graph the line will cut through (5,-2), (4,-2), (3,-2), (2,-2), (1,-2), and (0,-2). The line can pass through any x value, but the y value will always stay the same for this line. This means the y-intercept is -2. Because the slope is 0 and the y-intercept is -2, the equation is y = 0x -2, but there is no value in keeping the 0. So, you take it out leaving you with y = -2.
Hope This Helps! Good Luck and Have a Great Night!
Answer:
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The last option is the correct answer
