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Eduardwww [97]
3 years ago
6

Evaluate the expressions with grouping symbols: 7(13 - 8)

Mathematics
1 answer:
adelina 88 [10]3 years ago
8 0
I believe you multiply 7 by 13 then you multiply 7 by 8 and that gives you 151-56
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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
Rectangle Given:1=15 m, w=6m,A=​
sashaice [31]

Answer:

90m^2 and 144 m^2

Step-by-step explanation:

Given :

Length of the rectangle (l)=15m

Width of the rectangle (w)= 6 m

Area of the rectangle can be calculated as :

A=l*w\\A=(15)(6)\\A=90 m^2

Now,

Side of square (s)=12 m

Area of the square can be find:

A=s^2\\A=12^2\\A=144 m^2

6 0
3 years ago
Is x=y-1 a function or not
Irina-Kira [14]
Yes I think so I apologize if not
7 0
3 years ago
Say you want to buy x shirts which cost 2$ each and add tax which is $0.75. You have 13$ to make your purchase.
kobusy [5.1K]
EDIT: 
2x + 0.75 = 13
Add like terms
2x= 13-0.75
2x= 12.25
x= 12.25/2
x=6.125
You can buy 6 whole shirts with $0.25 left over

Hope this helps! A thanks/brainliest answer would be appreciated :)
3 0
3 years ago
A local store buys used video games. For each game bought, they would pay $18 less than the original price paid for the game. Wh
Sonbull [250]

Answer:

total amount =  n (d-18)

total amount = dn - 18n

Step-by-step explanation:

given data

pay  = $18 less than the original price

originally cost =  d dollars

sell  = n games

solution

we take original price paid for the game = d

and they will pay $18 less than the original price

so that can we say

d -18

and

when sold n games than the cost of n used games will be here

cost = n (d-18)

so it can express as

total amount =  n (d-18)

total amount = dn - 18n

7 0
3 years ago
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