It can be written as 15∧7/4
Answer:
Jessica bought 2.25 yards more fabric.
Step-by-step explanation:
For Jessica we will consider 5 to be 100% which is 1 in decimals (100÷100=1) of what she bought originally and since she bought 20% (which is 0.20 in decimals 20÷100=0.20) more then we have 100% + 20% = 1 + 0.20 = 1.20 of our original 5. So now we multiply 5×1.20=6, so Jessica bought 6 yards.
Similarly we have Dan who bought 3 yards plus 25% more. Well 25% is 0.25 and so: 100% + 25% = 125% = 1.25. Now, we will multiply 3 × 1.25 = 3.75 yards. Therefore, Jessica bought more fabric. How much more? 6 - 3.75 = 2.25 yards more.
The first thing we must do for this case is to define a variable.
We have then:
n: unknown number.
We write the algebraic expression:
13 - 4n
For n = 3 we have:
13 - 4 (3) = 13 - 12 = 1
Answer:
An expression that represents this phrase is:
13 - 4n
its value if n = 3 is:
1