Answer: Valid
Step-by-step explanation:
That's right, if they are both right angles, they are both 90 degrees. That means they're equal.
1) 3x+y+z=4
2) 2x+2y+3z=3
3) x+3y+2z = 5
1)*2 6x + 2y + 2z = 8
2) 2x + 2y +3z = 3
- __________________
4x - z = 5
2)*3 6x + 6y + 9z = 9
3)*2 2x + 6y + 4z = 10
- __________________
<span>4x+5z =-1
</span>
4x+5z = -1
4x - z =5
- ________
6z = -6
<u>z = -1
</u><u /><u>
</u>If z=-1,
4x -(-1) =5
4x = 5-1
x = 4/4
<u>x=1</u>
3x+y+z=4
3(1)+y+(-1)=4
3+y-1=4
<u>y=2
So z=-1, x=1, y=2</u>
She had 2,500 stamps before she gave 1% to her brother, since 2,475 is 99%, i just calculated this equation: p/w = a/100
Answer:
6x+50
Step-by-step explanation:
5(x+10)+x=5x+50+x=6x+50
Answer:
y = 3x
Step-by-step explanation:
y is 3 times greater than x. So to get Y you would have multiply x 3 times. 3x = 3 * x.
