X^2 + y^2 = 5
y = 2x
The second equation is solved for y, so substitute it in the first equation.
x^2 + (2x)^2 = 5
x^2 + 4x^2 = 5
5x^2 = 5
x^2 = 1
x^2 - 1 = 0
(x + 1)(x - 1) = 0
x = -1 or x = 1
Now substitute both values of x in the second equation and solve for y.
y = 2x
For x = -1
y = 2(-1)
y = -2
For x = 1
y = 2(1)
y = 2
Solution: (-1, -2), (1, 2)
Answer:
22
Step-by-step explanation:
should be the answer if im correct
<em>The sum of a number and 35 is 100. Create an equation and solve, and tell what the number was</em>.
Let's call our number n. Our equation is
n + 35 = 100
We can subtract 35 from each side to get
n + 35 - 35 = 100 - 35
n = 65
Step-by-step explanation:
1. 57 degrees
2. B
3. 117 degrees
4. C
Answer:
380
Step-by-step explanation:
285 / x = 75 / 100
Cross multiply 28500 = 75x
Divide by 75 380
