8.
2 answers:
Answer:
a) 22 taxis
b) 4 students
Step-by-step explanation:
150 ÷ 7 = 21 with a remain of 3.
You need one more taxi for those 3 students.
21 + 1 = 22
You need to hire 22 taxis.
<u>Check</u><u>:</u>
7 ×
____________________________________________________________
7 - 3 = 4
If you had 4 more students, then all of the taxis would be full.
<u>Check</u><u>:</u>
150 + 4 = 154
7 × 22 = 154
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Answer:
The correct answer is 15 cm.
Step-by-step explanation:
Let the width of the required poster be a cm.
We need to have a 6 cm margin at the top and a 4 cm margin at the bottom. Thus total margin combining top and bottom is 10 cm.
Similarly total margin combining both the sides is (4+4=) 8 cm.
So the required printing area of the poster is given by {( a-10 ) × ( a - 8) }
This area is equal to 125 as per as the given problem.
∴ (a - 10) × (a - 8) = 125
⇒ - 18 a +80 -125 =0
⇒ - 18 a -45 = 0
⇒ (a-15) (a-3) = 0
By law of trichotomy the possible values of a are 15 and 3.
But a=3 is absurd as a 4.
Thus the required answer is 15 cm.