Make one of the variables drop out.
I'd go for the y since it's easiest in this problem.
Time the top equation by -1.
This changes the system to:
![2x + - y = 1](https://tex.z-dn.net/?f=2x%20%2B%20-%20y%20%3D%201)
![- 4x + y = - 1](https://tex.z-dn.net/?f=%20-%204x%20%2B%20y%20%3D%20-%201)
Add the equations.
![2x + - 4x = - 2x](https://tex.z-dn.net/?f=2x%20%2B%20-%204x%20%3D%20-%202x)
![- y + y = 0](https://tex.z-dn.net/?f=%20-%20y%20%2B%20y%20%3D%200)
![1 + - 1 = 0](https://tex.z-dn.net/?f=1%20%2B%20-%201%20%3D%200)
The equation would be:
![- 2x + 0 = 0](https://tex.z-dn.net/?f=%20-%202x%20%2B%200%20%3D%200)
Or simply:
![- 2x = 0](https://tex.z-dn.net/?f=%20-%202x%20%3D%200)
Solve for x by dividing.
![x = 0 \div - 2](https://tex.z-dn.net/?f=x%20%3D%200%20%5Cdiv%20-%202)
![x = 0](https://tex.z-dn.net/?f=x%20%3D%200)
Then, plug x into one of the original equations to find y.
I'm going to use the first one since the numbers are smaller, but you CAN use either.
![- 2(0) + y = 1](https://tex.z-dn.net/?f=%20-%202%280%29%20%2B%20y%20%3D%201)
![0 + y = 1](https://tex.z-dn.net/?f=0%20%2B%20y%20%3D%201)
![y = 1](https://tex.z-dn.net/?f=y%20%3D%201)
Put these into an ordered pair.
(0,1)
That is your answer.
Hope this helped!
:)
X would be 4 so the answer is B
Hey there!!
Things to remember while writing a standard form:
- The equation shall always start with 'x'
- The term 'x' shall not be negative or a fraction.
First, let's get this into slope-intercept form:
... y = mx + b
... 5 = (4/3)(-2) + b
... 5 = (-8/3) + b
... 5 + (8/3) = b
... b = 23/3
Slope-intercept=
... y = (4x/3) + (23/3)
Subtracting 4x/3 on both sides:
... (-4x/3) + y = 23/3
Multiplying by 3 on both sides:
... -4x + 3y = 23
Final equation :
<em>4x - 3y = -23 </em>
Hope my answer helps!
Answer:
1275
Step-by-step explanation:
Because 1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50 = 1275
Also this was a weird but easy question!
<span>b- No; even though there is a strong negative correlation, not eating vegetables doesn't necessarily cause high blood pressure </span>