<h3>
Answer: 18</h3>
Reason:
Subtract any pair of adjacent terms
- d = term2 - term1 = -74 - (-92) = -74+92 = 18
- d = term3 - term2 = -56- (-74) = -56+74= 18
- d = term4 - term3 = -38- (-56) = -38+56= 18
- d = term5 - term4 = -20- (-38) = -20+38= 18
Each time we get the same value to confirm that we have an arithmetic sequence of common difference 18.
Answer:
y = 2x
Step-by-step explanation:
Claire is hungry. She buys 2 donuts each costing x $. How much should she pay?
Since one donut costs x $ 2 donuts cost 2x $.
Therefore, total amount Claire should pay, call it y = 2x.
Hence, we have y = 2x.
<em>Answer:</em>
<em>Let the present ages of man and son be x and y respectively
</em>
<em>x+y = 45 </em>
<em>
</em>
<em>5 yrs ago , age of man = (x-5)
</em>
<em>age of son = (y-5) </em>
<em>(x-5)(y-5) = 4(x-5)
</em>
<em>(y-5) = [4(x-5)] / (x-5)
</em>
<em>y-5 = 4. [(x-5) got cancelled out]
</em>
<em>y = 9 yrs </em>
x+y = 45 yrs
x+9 = 45
x = 45-9 yrs => 36 yrs
30/5 = 6
30 - 6 = 24
Therefore, only 24 students were in class today.
