Answer:
Given equations:
<u>Make x the subject in equation 1</u>:
<u>Substitute this into equation 2</u>:
2(y - 3) - 7y = -14
2y - 7y = -14 + 6
-5y = -8
y = -8/-5
y = 1.6
Then x = y - 3
= 1.6 - 3
= -1.4
Solution: (x, y) ⇒ (-1.4, 1.6)
Answer:
V = 1436.76
Step-by-step explanation:
<u>Formula:</u>
V = 4/3πr³
<u>Given:</u>
r = 7
<u>Work:</u>
V = 4/3πr³
V = 4/3π(7³)
V = 4/3π(343)
V = 1436.76
Answer:
scale factor = 3
Step-by-step explanation:
To determine the scale factor, calculate the ratio of the image x and y coordinates to the original x and y coordinates, that is
scale factor = 
= 
= 3
Answer:
18
Step-by-step explanation:
Given that:
y∞ xz
y=kxz. Where k is constant
When z=196 and x= 2 then y= 7
7=(196)(2)k
7=392k
k=1/56
There fore y=(1/56)xz
When x=3 and z =336
y=(1/56)xz
y=(1/56)(336)(3)
y=18
Answer:
y=-5x+3
Step-by-step explanation:
