4x + 5y = -13
2(4x + 5y) = 2(-13)
8x + 10y = -26 (equation 1)
5x - 2y = -8
5(5x - 2y) = 5(-8)
25x - 10y = -40 (equation 2)
equation 1 + equation 2,
(8x + 10y) + (25x - 10y) = (-26) + (-40)
8x + 10y + 25x - 10y = -26 + -40
33x = -66
x = -2
substitute x = -2 into equation 1,
8x + 10y = -26
8(-2) + 10y = -26
-16 + 10y = -26
10y = -10
y = -1
The values of x and y are -2 and -1 respectively.
3tens + 5 tens = 80 tens= 80
Answer:
90%
Divide 180 by 200, and you get .9. Convert that into. a percentage
Answer:
The normal price of the drink is $1.2
Step-by-step explanation:
We are given the following in the question:
Number of drinks bought = 22
Discount on each drink = $0.35
Total money paid = $18.70
Let x be the normal price of the drink.
Thus, we can write the equation:
![\text{(Discounted price)(Total number of drinks)= Money paid}\\(x-0.35)(22) = 18.70\\22x - 7.7 = 18.70\\22x = 26.4\\x = 1.2](https://tex.z-dn.net/?f=%5Ctext%7B%28Discounted%20price%29%28Total%20number%20of%20drinks%29%3D%20Money%20paid%7D%5C%5C%28x-0.35%29%2822%29%20%3D%2018.70%5C%5C22x%20-%207.7%20%3D%2018.70%5C%5C22x%20%3D%2026.4%5C%5Cx%20%3D%201.2)
Thus, the normal price of the drink is $1.2
Answer:
Each eraser costs $5.00.
Step-by-step explanation:
In the question, it says that John had bought a $5.00 magazine. So, we already know that he used $5.00 for a magazine, and used up exactly $25.00. This must mean that he used $5.00 for each eraser because he used up $20.00 for four erasers. 4x5 = 20.