Answer:
Step-by-step explanation:
Adam plans to choose a video game from a section of the store where everything is 75% off.
The expression written by him for this situation is d - 0.75d.
Here, the part d represents the sale price before discount and the part 0.75d is the discount amount.
The expression written by Rena is 0.25d.
Here, the part 0.25d is the price after discount. Since 75% is the discount, the rate after disount is 25% and 25% of d is 0.25d.
A. 12
B.8
C.8
D.16
Hope this helps
So you just want to find out how many groups of 5 1/2 are in 15 dollars, or just dividing.
15/5.5 = 2.72 dollars
I think you said round to the nearest tenth, so 2.70 dollars.
Answer:
Step-by-step explanation:
You didn't list any choices here, but it doesn't matter. There's only one way to get to the answer so we'll work it through and you can match it up to your choices. The only thing I don't know is how pens is identified if pencils is "p". So I'm going to use the words "pens" and "pencils" and you can take it from there at the end.
If a pen's cost IS twice as much as a pencil...
the word "is" indicates an equals sign, the words "twice as much" indicates 2 multiplied by something. To put that above sentence into an algebraic expression:
pen = 2 pencils
Now for the money part of this.
The total cost of 11 pens and 11 pencils IS (there's that word again!) 2.10
Therefore,
11 pens + 11 pencils = 2.10
But we know from the first expression that pen = 2 pencils so we make the substitution:
11(2 pencils) + 11 pencils = 2.10
I'm not sure how far you are to go with this. That's the main equation you need to solve this. If you were to go further with it you would distribute the 11 into the set of parenthesis to get:
22 pencils + 11 pencils = 2.10 and combine like terms:
33 pencils = 2.10 so
1 pencil is approximately $.06
It's a factor. This concept is widely used throughout algebra, and you'll probably bump into it through the end of high school and beyond.
A common use is expressing a term in <em>prime factorization</em>, or reducing a number to its most base parts- primes. For example:
Of course, a number like 13 which is already prime is made up of itself and 1. <em>Factors do not have to be primes.</em> 20 is also reducible through combinations of 1, 2, 4, 5, 10, and 20. Prime factorization is just a handy example.
Basically, factors multiply with each other to create other numbers, and numbers can be reduced down to their factors.
