Given two terms a, b.
Sum of terms = a+b
Difference of terms = a-b
Product of sum and difference (do not forget parentheses)
=(a+b)(a-b)
which can be expanded as=a^2-b^2
We can make use of this property to calculate with lightning speed, assuming you know the squares of numbers.
For example,
8*6=(7+1)(7-1)=7^2-1^2=48
9*7=(8+1(8-1)=8^2-1^2=64-1=63
5*15 = (10+5)(10-5)=10^2-5^2=75
22*18=(20+2)(20-2)=20^2-2^2=400-4=396
63*57=(60+3)(60-3)=60^2-3^2=3600-9=3591
128*112=(120+8)(120-8)=120^2-8^2=14400-64=14336
We can go on and on!
20,520 + 3.078 = 23,598 so... 513 * 46 = 23,598
To find the total revenue for any object, you simply multiply the price of the object by the number of units sold.
In this case, the revenue for helments would be 3*14, and the revenue for bicycles would be 125*b.
Knowing that total revenue was 917, we can form an equation:
125b + 3*14 = 917
125b + 42 = 917
Subtract both sides by 42:
125b = 875
b = 7
Sawyer sold 7 bicycles
The two consecutive even integers are 58 and 60.
(58 x 3) + 60
(174) + 60
234
Answer:
b i believe good luck with the answer
