Answer:
Step-by-step explanation:
given system :
y=-2x+6 ........(1)
3y-x+3=23.........(2)
Substitute y = -2x+6 into (2) and solve for x :
3( -2x+6) - x +3 = 23
- 6x +18 - x +3 =23
- 7x = 2
x =- 2/7
Substitute : x into (1) : y = -2 (-2/7)+6 = 46/7
<em><u>Answer:</u></em>
12.8 or option 3
<em><u>Step-by-step explanation:</u></em>
So this is actually a proportion:
The large triangle to the smaller one:
<em>The angles of the triangles are the same so they are proportional</em>
We know the larger one is 20/8 times the smaller one's sides because
<em>YZ = something times QR so:</em>
20 = 8 times 20/8
In order to find PR, we have to divide ZX by the proportion rate thing so:
32 / (20/8)
= 32 * 8/20
= 64/5
= 12.8
From the above statement we can assume an angle and its complement as x and (90° - x)
now, it's goven that the angle and it's complement are equal, so
i hope it helped...
Since each side is r times the side of ABC, then 30*r+40*r+60*r is the perimeter, which equals 130r (by separating it into r*(30+40+60) using the distributive property)