Answer: old McDonald has 54 chickens and 2 cows.
Step-by-step explanation:
Let x represent the number of chickens that old McDonald have.
Let y represent the number of cows that old McDonald have.
He counted 56 heads. A chicken and a cow has one head each. It means that
x + y = 56
He counted 116 legs. A chicken has 2 legs and a cow has 4 legs. It means that
2x + 4y = 116 - - - - - - - - -1
Substituting x = 56 - y into equation 1, it becomes
2(56 - y) + 4y = 116
112 - 2y + 4y = 116
- 2y + 4y = 116 - 112
2y = 4
y = 4/2 = 2
x = 56 - y = 56 - 2
x = 54
Hello from MrBillDoesMath!
Answer:
35x - 600
Discussion:
Area of unshaed rectangle =
area of full rectangle - area of shaded rectangle =
35x - 600
Thank you,
MrB
Answer:
A 5:7
Ste:p-by-step explanation
because you would look at what the denominator and 7 is the least and 5.
hope this helps!
1. The area of a rectangle is calculated by multiplying its width and lengh (which you can also understand by looking at the figures in table, column 3 is clearly column 2 times column 1) so we can write it Area = 8w
2.
A. y=0,8x+3
B. x is the number of miles driven by the taxi - y is the total cost of the ride
3. You can see that y=3x-5 in each of the case. Which means that y=37 for x=14
4. For each x in the table we can see that y is 3 times higher reduced by 2 units so we can write it y=3x-2
Did it help?
Take the linear coefients easy
11,-12, 7
5,12,-7
so
![\left[\begin{array}{ccc}11&-12&7\\5&12&-7\end{array}\right]](https://tex.z-dn.net/?f=%20%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D11%26-12%267%5C%5C5%2612%26-7%5Cend%7Barray%7D%5Cright%5D%20)
or you could do also
![\left[\begin{array}{ccc}11&-12\\5&12\end{array}\right] \left[\begin{array}{ccc}7\\-7\end{array}\right]](https://tex.z-dn.net/?f=%20%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D11%26-12%5C%5C5%2612%5Cend%7Barray%7D%5Cright%5D%20%20%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D7%5C%5C-7%5Cend%7Barray%7D%5Cright%5D%20)
