The distance formula is:
![d= \sqrt{(x_1-x_2)^2+(y_1-y_2)^2}](https://tex.z-dn.net/?f=d%3D%20%5Csqrt%7B%28x_1-x_2%29%5E2%2B%28y_1-y_2%29%5E2%7D%20)
We are given two points in the form (x,y), so plug in the values to the distance formula:
![d= \sqrt{(-10-15)^2-(12-12)^2}](https://tex.z-dn.net/?f=d%3D%20%5Csqrt%7B%28-10-15%29%5E2-%2812-12%29%5E2%7D%20)
Next we can simplify. We know that 12-12 is 0, so we can drop it from the equation, as it will not affect our answer. Also, we know that -10-15 is -25:
![d= \sqrt{(-25)^2}](https://tex.z-dn.net/?f=d%3D%20%5Csqrt%7B%28-25%29%5E2%7D%20)
The square and square root cancel each other out leaving us with 25.
The answer is 25.
Call T the price of the T-shirts and P de price of the jeans
Initially (without discount)
2T + P = 40
One month later (half prices)
2 (T/2) + 5(P/2) = 60
T +5P/2 = 60
To solve the system of equations multiply the second equation by 2 and substract it from the first equation
2 T + 5P = 120
- (2 T + P = 40 )
________________
4P = 80
P = 80/4
P = 20
From 2T + P = 40
T = (40 - P) / 2 = (40 -20) / 2 = 20/2 = 10.
The price of a T-shirt is $10 and the price of a pair of jeans is $20.
Answer:
its 55
Step-by-step explanation:
Answer:
D. 4(3x-5) = 52
Step-by-step explanation:
52 is equal the sum of one side multiplied by 4
So
4(3x-5) = 52
Is the right answer