Express as a ordinary numerals(a)2×7(b)4×10
1 answer:
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To answer the question, let B call the amount of meat and P the number of potatoes.
The recipe says that for every pound of meat we need 3 potatoes.
Then that relationship is written as follows:
If we increase the amounts of the recipe by 100%, it will multiply by 2 the amount of meat and also that of potatoes. Therefore we need 2 pounds of meat and 6 potatoes.
Then the relationship is:
But
Therefore, the proportion that represents the situation remains the same
This occurs because the increase in the amount of potatoes and beef was in the same proportion.
Answer:
x = 2 - 5, x = 2 + 5
Step-by-step explanation:
x² - 4x = 71
to complete the square
add ( half the coefficient of the x- term )² to both sides
x² + 2(- 2)x + 4 = 71 + 4
(x - 2)² = 75 ( take the square root of both sides )
x - 2 = ± = ± 5
( add 2 to both sides )
x = 2 ± 5
then
x = 2 - 5 , x = 2 + 5