Solve for x, set y to 0
2x - 4(0) = 9
2x = 9
<span>x = 4.5
</span>Solve for y, set x to 0.
2(0) - 4y = 9
-4y = 9
<span />
y = -2.25
The length of the shorter wire is 12 cm
Step-by-step explanation:
Let us assume that the 27 cm wire is cut into two pieces of length x cm and so the longer part would be x+3 cm.
Now we know that the total length of the wire is 27cm so
x+(x+3) = 27
2x+3 = 27
2x = 27-3
2x = 24
x = 12 cm
Answer:
1) biased sample
2) random sampling
Step-by-step explanation:
Since the results are based on feedback of students in only one class, it's not a good representative of the entire student body.
Also, since it's a math class there will be a bias.
Better method would be randomly selecting students from the entire school students list and take their feedback
132 large dolls
43 small dolls
given another 14
132+43+14
= 189
Answer:
Yes
Step-by-step explanation:
7:14=1:2
3:6=1:2