Answer:
x+y=28
70x+140y=3360
8 cats, 20 dogs were sold
Step-by-step explanation:
Let x=cats y=dogs
We know that a total of 28 pets were sold which means that
x+y=28
We also know that they made 3360 which means that
70x+140y=3360
It doesn't really say if you need to solve this but I will anyways
We use the first equation (x+y=28) and subtract 28 and y from both sides to get
x-28= -y we can then divide both sides by -1 so y can be a positive
-x+28=y
This is what y equals in terms of x and so we can plug this in for y in the second equation
70x+140(-x+28)=3360
Distribute the 140 and get
70x-140x+3920=3360
Add like terms and subtract 3920 to get
-70x=-560
divide both sides by -70 and get
x=8
We now know that 8 cats were sold and can plug this value into any equation to solve for y ( I will be using the first one because that's easiest)
8+y=28
subtract 8 and get
y=20
Answer: n = 4
Step-by-step explanation:
Divide both sides by 3
n+2=3(6−n)
Expand
n+2=18−3n
Subtract 2 from both sides
n=18−3n−2
Simplify 18−3n−2 to −3n+16.
n=−3n+16
Add 3n to both sides
n+3n=16
Simplify n+3n to 4n
4n=16
Divide both sides by 4
n= 4/16
Simplify 16/4 to4
n=4
V = kf / n
nV = kf
n = kf / V
Answer:
2
Step-by-step explanation:
First let's find two clear points on this line. These points are shown by two black dots on the line.
Their coordinates are:
(0, -3) and (2, 1)
Now we want to use the slope formula: (y₂ - y₁) / (x₂ - x₁)
Plug in the coordinates we just found.
(1 - (-3)) / (2 - 0)
Simplify the parentheses.
= (1 + 3) / (2)
= (4) / (2)
Simplify the fraction.
4/2
= 2
This is your slope.
Hope this helps!
The coin was thrown 500 times.