3 years ago

Solve the proportional equation b/10=3/5

Mathematics

2 answers:

ivann1987 [24]3 years ago

4 0

Answer:

Step-by-step explanation:

first multiply 10 and 3 together and you will get 30. then divide that by 5 and get 6

ra1l [238]3 years ago

3 0

Answer: b is 6

Step-by-step explanation:

Set the proportions up and solve for b

b. 3

---- = ------

10. 5

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Use the arithmetic sequence of numbers 1, 3, 5, 7, 9,.to find the following:

Rasek [7]

$a)\\\\
a_{n+1}-a_n=d\\
for\ n=1\\
a_2-a_1=d\\
d=3-1=2\ - difference\ between\ two\ consecutive\ terms\\\\
b)\\
a_n=a_1+(n-1)d\\
n=101\\
a_{101}=1+(101-1)*2\\
a_{101}=1+100*2=200+1=201\\\\
c)\\
Sn=\frac{a_1+a_n}{2}*n\\
n=20\\
a_n=a_{20}=1+(20-1)*2=1+38=39\\
Sn=\frac{1+39}{2}*20=400\ \ Sum\ of\ the\ first\ 20 \ numbers.$