Answer: B
Step-by-step explanation:
Answer:
A)55
B)110
Step-by-step explanation:500 /11%=55
55*2=110
Answer:
more information please
Step-by-step explanation:
Answer:
- {thermometer, fridge, rusty nail, deoderant}
- {credit card, face wash, tweezers, shovel}
- {clothes, glass, car, greeting card}
Step-by-step explanation:
The options that will be equivalent to T will have to be the options that have the same Cardinality as T. Cardinality refers to the number of elements in a set and in the set T, there are 4 elements being Tinkey-Winky, Laa-Laa, Dipsy, Po so the Cardinality is 4.
The equivalent sets would therefore be sets with a cardinality of 4 as well and those are;
- {thermometer, fridge, rusty nail, deoderant}
- {credit card, face wash, tweezers, shovel}
- {clothes, glass, car, greeting card}
I cannot see Zoe's work to explain the error, but the correct method of solving is listed:
x is the number of 30-second ads
y is the number of 60-second ads
x+y=12(60)=720 would be the first equation; this is because while the ads together make 12 minutes, the ad times are in seconds. This means we must multiply 12 by 60.
y=2x is the second equation
Our system is then
x+y=720
y=2x
We will use substitution to solve this. Plug 2x in place of y in the first equation:
x+2x = 720
Combine like terms:
3x = 720
Divide both sides by 3:
3x/3 = 720/3
x = 240
Substitute this value in for x in the second equation:
y=2(240)
y=480
