Answer:
It means or stands for the probably that either A or B occurs or both.
Step-by-step explanation:
It really isn't steps to it you just have to learn it.
Answer:
Step-by-step explanation:
40/32 ?=? (40 + 12.5) / (32 + 10)
1.25 ?=? 52.5 / 42
1.25 = 1.25
similar via SAS
On number 2 2 times -3 is 6
Make an equation system based on the problem<span>An equation for "A plane has 360 total seats, </span>which are divided into economy class and business class" is
∴ e + b = 360 (first equation)
"<span>For every 13 seats in economy class, there are 5seats in business class" that means in 1b there is (5/13) e
</span>∴

(second equation)
<span>
Solve the equation, find the value of e</span><span>Subtitute b with (5e)/13 in the first equation
</span>e + b = 360

Equalize the denominators


move 13 to the right side, and solve for e

18e = 360 × 13
18e = 4,680
e = 4,680/18
e = 260
Find the value of be + b = 360
260 + b = 360
b = 360 - 260
b = 100
There are 260 seats in economy class and 100 seats in business class