Answer:
sandwich hut is the best deal (what's the question????)
Step-by-step explanation:
because sandwich hut is buy one get one free, one sandwich costs $1.00 ($2 divided by 2 sandwiches)
Benny's costs $1.25 per sandwich ($5 divided by 4 sandwiches)
ABC costs $1.50 per sandwich ($6 divided by 4 sandwiches)
Answer:
It always has a solution until you get to imaginary numbers.
Plug in a=b for a=2
2≥2 which is true! so it will always have a solution.
B - 2 <u>></u> -1
This is an inequality equation. It is not equal to a specific number. There are a lot of numbers that can be considered as long as it makes the inequality equation TRUE.
b - 2 <u>></u> -1
<u> + 2 + 2</u>
b <u>></u> 1
b is a number that is at least 1 or greater than 1.
b = 1
1 - 2 <u>></u> -1
- 1 <u>></u> -1 True. Had the sign been only > and not <u>></u>, 1 would not be a value of b.
b = 2
2 - 2 <u>></u> -1
0 <u>></u> -1 True.
Let n represent the number.
.. (n -9)^2 = n -3 . . . . . the square of 9 less than the number is 3 less than the number
.. n^2 -18n +81 = n -3
.. n^2 -19n +84 = 0
.. (n -7)(n -12) = 0
.. n = 7 or 12
The number could be 7 or 12.
_____
Check:
.. (7 -9)^2 = (-2)^2 = 4 = 7 -3 . . . . answer checks OK
.. (12 -9)^2 = 3^2 = 9 = 12 -3 . . . . answer checks OK
Let x = hours to meet
train one has a 2 hour head start or 210 km head start
210 + 105x = 135x
30x = 210
x = 7 hours to meet
