Answer:
B. 5 hours
Step-by-step explanation:
If the train is going 60mph and we need to find out how long it will be until it is traveling 80mph then we have to do 80-60=20 to figure out how much the speed is changeing. Since every hour the speed increases by 4mph then we have to do how much the train is increasing divided by how much it increases per hour.
20÷4=5
Therefore it will take 5 hours
Answer:
C 126 sq. units
Step-by-step explanation:
A = 1/2(b)(h)
A = 1/2(21)(12)
A = 1/2 × 252
A = 126 sq. units
Use long division.
y - 1
-------------------------------
y³+1 | y⁴ - y³ + 2y² + y - 1
y⁴ + y
-------------------------------
- y³ + 2y² - 1
- y³ - 1
---------------------------
2y²
Answer: y - 1 + 2y2 ÷ y³+1
Note:
The correct answer should be written with parenthesis, as y - 1 + y²/(y³+1) in order to avoid ambiguity.
Answer:
2 erasers cost <u><em>$1.20</em></u>
Step-by-step explanation:
Nigel bought 10 pencils and 5 erasers for $8.
We can write this algebraically:
10p + 5e = 8
We know that the price of 2 pencils is $1. That is $0.50/Pencil.
So, p = $0.50. Now we can plug that into out equation and find the price of one eraser:
10(0.50) + 5e = 8
5 + 5e = 8
5e = 3
e = $0.60
Now, we have the price of one eraser,<em> </em><u><em>$0.60</em></u>, and we can multiply this by 2 to find the price of 2 erasers, which equates to <u><em>$1.20</em></u>.
Answer:
length is 60 and width is 30
Step-by-step explanation:
because the formula to find perimeter is 2l+2w and if you plug 60 and 30 into that equation then you get 120+60 which is 180
