On enlarging the rectangle, the proportion or ratio of Length to Height will stay the same.
The ratio of original length to height is 13 : 6
The ratio in enlarged rectangle will stay the same. Let the height of enlarged rectangle is y cm. So we can write:
Therefore, the height in enlarged rectangle will be 9 cm
By calculating the slope, the average rate of change is -2
-1-11
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1--5
Answer:
Only B and C are correct
Step-by-step explanation:
Answer:
B
Step-by-step explanation:
Given
x² - 18x + --- = 4 + ----
To complete the square
add ( half the coefficient of the x- term )² to both sides
x² + 2(- 9)x + 81 = 4 + 81
(x - 9)² = 85 ( take the square root of both sides )
x - 9 = ± ( add 9 to both sides )
x = 9 ± ← exact solutions