Answer: 28 color sets were sold
Step-by-step explanation:
Let x represent the number of black-and - white models that were sold.
Let y represent the number of color sets that were sold.
An appliance dealer sold 40 tv sets during a special sale. Some of the sets were black-and - white models while the rest were color sets.. It means that
x + y = 40
Black-and - white models each sold for $119. Color sets sold at $319each. The sale brought in $10,360. It means that
119x + 319y = 10360 - - - - - -- - - - - -1
Substituting x = 40 - y into equation 1, it becomes
119(40 - y) + 319y = 10360
4760 - 119y + 319y = 10360
- 119y + 319y = 10360 - 4760
200y = 5600
y = 5600/200
y = 28
Answer:
D
Step-by-step explanation:
To obtain vertex form from the given equation use the method of completing the square
given 8y + x² = - y² - 181 + 26x
rearrange having the x terms and y terms together
add y² to both sides
8y + x² + y² = - 181 + 26x ( subtract 26x from both sides )
x² - 26x + y² + 8y = - 181
add (half the coefficient of the x/y terms )² to both sides
x² + 2(- 13)x + 169 +y² + 2(4)y + 16 = - 181 + 169 + 16
completing the square on both the x and y terms
(x - 13)² + (y + 4)² = 4 → D
Answer:
6
Step-by-step explanation:
0 / 6 is equal to 0 because anything that divides 0 will always be zero but never if the problem is 6/0
