Answer:
7
Step-by-step explanation:
The original 15 people are 10% of the total number of people who received the mail.
Step-by-step explanation:
Given,
Number of people who received mail = 15
Mail further sent to 3 more friends;
Number of people who received mail from 15 people = 15*3 = 45 people
Number of people who received mail from 45 people = 45*2 = 90 people
Total number of people = 15+45+90 = 150 people
Now,
Percent of original people = 
Percent of original people = 
The original 15 people are 10% of the total number of people who received the mail.
Keywords: multiplication, percentage
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Answer:
Step-by-step explanation:
First you distribute so two times 4Y is 6Y then you multiply the two in the five which gives you 2Y -5 equals 70
Answer: 4.5
Step-by-step explanation: because, 3x4=12 then you have 1.5 left and 1.5 is half of three so you would have .5 and you then add 4+.5 to get 4.5
Answer:
Step-by-step explanation:
2) Let 't' be the temperature
t < 7
Height be 'h'
h >= 42
Cos be represented by 'c'
c >= 125
3) Distributive property: a*(b +c) =(a*b) + (b*c)
2(5a + 3b) + 5a +2b = 2*5a + 2*3b + 5a + 2b
= 10a + 6b + 5a + 2b
= 10a + 5a + 6b + 2b {Combine like terms}
= 15a + 8b
6y + 2(3x + 5) + 2y + 3 = 6y + 2*3x + 2*5 + 2y + 3
= 6y + 6x + 10 + 2y + 3
= 6y + 2y + 10 +3 + 6x
= 8y + 13 + 6x