Answer: 50% increase
Step-by-step explanation:
Think of 20 as 100%
Half of 20 is 10 which is 50% in this scenario.
30-20=10
This means that the price of the item increased by 50% or 10.
I think the answer is 21 (I don’t know the units)
Step-by-step explanation:
Remember, math is a language
when you see per think fractions
15.2 miles per hour = 15.2 miles / 1 hour
since this is a fraction, Units can cancel just like numbers
To cancel miles and be left with hours rearrange the fraction
1 hour / 15.2 miles
then multiply by 72 miles
![\frac{1hour}{15.2miles} \times 72miles](https://tex.z-dn.net/?f=%20%5Cfrac%7B1hour%7D%7B15.2miles%7D%20%20%5Ctimes%2072miles)
the miles cancel and youre left with hours!
so youd write and solve 72 / 15.2
First part its 4C2 = 4*3 / 2 = 6
Second part
12 * 100
---------- = 4.3 %
280
Instead of using an = sign we use
![\leq](https://tex.z-dn.net/?f=%20%5Cleq%20)
becuase its less than or equal to 100 dollars.
The equation of the line is y=10x+7
sub in 100 for y and the inequallity sign
10x+7
![\leq](https://tex.z-dn.net/?f=%20%5Cleq%20)
100
solve so x is isolated
10x
![\leq](https://tex.z-dn.net/?f=%20%5Cleq%20)
93
x
![\leq](https://tex.z-dn.net/?f=%20%5Cleq%20)
9.3
technically the answer is 9 because you cant buy a fraction of a CD