Answer:
Speed = 10.42 m/secs
Step-by-step explanation:
We have been given with:-
Distance = 100m
Time taken = 9
secs
1) First, we need to convert the mixed number 9
to an improper fraction.
<u>Method to convert a mixed number to an improper fraction</u>
<u>
</u>
Applying the above formula, we get
9
= ![\frac{5*9+3}{5}](https://tex.z-dn.net/?f=%5Cfrac%7B5%2A9%2B3%7D%7B5%7D)
= ![\frac{45+3}{5}](https://tex.z-dn.net/?f=%5Cfrac%7B45%2B3%7D%7B5%7D)
= ![\frac{48}{5}](https://tex.z-dn.net/?f=%5Cfrac%7B48%7D%7B5%7D)
2) Now we need to convert
into a decimal by dividing 48 by 5.
We get time taken as 9.6 secs
3) We need to find the speed using the below formula:-
Speed = ![\frac{Distance}{Time taken}](https://tex.z-dn.net/?f=%5Cfrac%7BDistance%7D%7BTime%20taken%7D)
Plugging the values of Distance and Time taken into the formula, we get
Speed = ![\frac{100}{9.6}](https://tex.z-dn.net/?f=%5Cfrac%7B100%7D%7B9.6%7D)
= 10.416 m/secs
4) Upon rounding it to the nearest hundredth, we get
Speed = 10.42 m/secs
3x+18
Step-by-step explanation:
Answer:
7x^2 + 14x - 12
Step-by-step explanation:
Add like terms:
(4x + 8x - 5) + (3x2 + 6x - 7) becomes:
4x^2 + 8x - 5 or (grouping like terms in columns):
+ 3x^2 + 6x - 7
---------------------
7x^2 + 14x - 12
Step-by-step explanation:
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Answer:
5x + 2y = 3280
x+y = 785
x = 785 - y
5*(785 - y) + 2y = 3280
3925 - 5y + 2y = 3280
3925 - 3280 - 3y = 0
645 = 3y
y=645/3=215
x=785-215 = 570
Adults - 570 tickets, childs - 215 tickets.
570*5 + 215*2 = 3280
570 adult and 215 child and 3,280 in total
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