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quester [9]
2 years ago
15

Please help.. :( This is confusing

Mathematics
1 answer:
kherson [118]2 years ago
4 0

Answer:

x² + 4x + 9

Step-by-step explanation:

This is just adding like terms (Adding x²'s to each other, adding x's to each other, etc.)

3x² - 2x² = x²

-x + 5x = 4x

7 + 2 = 9

So all together its x² + 4x + 9.

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A barrel of crude oil contains about 5.61 cubic feet of oil. How many barrels of oil contained in 1 mile (5280 feet) of a pipeli
8_murik_8 [283]
1)volume of the  pipeline

The pipeline is a cylinder, therefore;
Volume (cylinder)=πr²h
r=radius
h=height of the cylinder

diameter=6 in*(1 ft / 12 in)=0.5 ft
raius=diameter / 2=0.5 ft / 2=0.25 ft.
height=5280 ft

Volume (pipeline)=π(0.25 ft)²(5280 ft)=330π ft³≈1036.73 ft³.


2) we calculate the number of barrel
1 mile of oil in this pipeline is 330π ft³ of oil.

1 barrel of crude------------------5.61 ft³
x----------------------------------330π ft³

x=(1 barrel*330π ft³) / 5.61 ft³=184.8 barrels

3) we calculate the price.

1 barrel---------------$100
184.8 barrels----------  x

x=(184.8 barrels * $100) / 1 barrel=$18,480

Solution: ≈$18,480
6 0
3 years ago
A bag contains 3 red marbles, 4 blue marbles, and 6 green marbles. Which pair of events are complementary events? A) choosing a
kotykmax [81]

Answer:

Event D

Step-by-step explanation:

Complementary events are those events that are opposites of each other. i.e. in this case the complementary event for choosing a green marble is not choosing a green. It has nothing to do with choosing or not choosing marbles of colors other than green.

7 0
3 years ago
Subtract. 1 1/3−6 Enter your answer as a simplified mixed number by filling in the boxes IF YOU GET THIS RIGHT ILL GIVE BRAINLES
Vesnalui [34]

Answer:

-4\frac{2}{3}

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
Jane's salary is increased by 2% to $30396. How much was her salary before the rise?
harina [27]
_award brainliest if helped!

so 102% = 30396
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Her salary was $29800 before the rise
6 0
3 years ago
Read 2 more answers
For EACH ordered pair, determine if its a solution to 2x+9y=13
vladimir1956 [14]
The answer is (2,1). 2*2=4 and 9*1=9. 9+4=13
8 0
3 years ago
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