<em>Answer:</em>
<em>x = 3</em>
<em>Step-by-step explanation:</em>
<em>5(x - 2) – x – 5 = -3</em>
<em>5x - 10 - x - 5 = - 3</em>
<em>5x - x = 10 + 5 - 3</em>
<em>4x = 12</em>
<em>x = 12 : 4</em>
<em>x = 3</em>
Answer:
Step-by-step explanation:
<u>Given</u>
<u>This is symmetrical for x and y, so</u>
- y#x = 1/(1/y + 1/x) is same as above
<u>If x#y = 7, then:</u>
- 7 = 1/(1/x + 1/y)
- 1/(1/7) = 1/(1/x + 1/y)
- 1/7 = 1/x + 1/y
<u>Possible value of x is 14, then y = 14 as well:</u>
- 1/7 = 1/14 + 1/14
- 1/7 = 2/14
- 1/7 = 1/7
Correct choice is A
Answer:
x = -1
Step-by-step explanation:
5x + 2y = 1 (eqn 1)
y = -x + 2 (can also be written as y = 2 - x)
subbing y = -x +2 in eqn 1,
5x + 2(2-x) = 1
5x + 4 - 2x = 1
3x = 1 - 4
3x = -3
x = -1
Hope this helps, and please mark me brainliest if it does!
Answer:
Figure A - hexagon
Figure B - triangle
Figure C - rectangle
Figure D - octagon
Step-by-step explanation:
If figure B has 3 vertices (angles), then that means it is a triangle (3 sides)
So that means figure A has 6 sides, (hexagon)
And figure D has 8 vertices, so 8 sides (octagon)
And if C has half as many, that would be 4 (rectangle)