Answer:
ab(ab + 20)
Step-by-step explanation:
Because we see both terms have at least one ab in it, we can factor out ab and get ab(ab + 20). However, because ab^2 does not have any coefficient, there is nothing more to factor out. Thus, ab is your greatest common factor, or GCF.
The total land available in the US = 3.794 million square miles which is 3,794,000 square miles
The land used for food production is 650, 000 square miles
To find the percentage used in food production, we divide the land used in food production by the total land and multiply the quotient by 100.
Percent for food =
(650, 000/3, 794, 000) * 100
Percentages land used for food
= 17.13%
ANSWER
C. 35 men
EXPLANATION
Let m represent the number of men needed and d represent the number of days.
From the question,the number of men needed varies inversely to the time needed to complete the project.
We can write the inverse variation equation.

where k is the constant of variation.
When m=28, d =90.
We substitute these values into the variation equation to determine the value of k.



Now the equation becomes:

When d=72,


Therefore he needs to have 35 men working.
Answer:
x= 2.4
Step-by-step explanation:
Answer:
Step-by-step explanation:
1). ∠7 ≅ ∠ 2 (alternate exterior)
m∠7 = m∠2 = 30°
2). ∠4 and ∠1 are supplementary angles
m∠1 = 180° - 72° = 108°