Answer: Martha spend $537.25 in june to have the same average as in the first quarter.
Step-by-step explanation:
Given that,
Average monthly expenditure for the first quarter= $396.25
Expenditure in April= $401.50
Expenditure in May= $250.00
Suppose, expenditure in June= x
To have the same average as in the first quarter, we have to take the average of the second quarter equals to the average of first quarter.
So,
Average monthly expenditure for the second quarter= $396.25
Using the formula of average for monthly expenditure for second qaurter as follow:
Average monthly expenditure for months April, May, and June= Sum of expenditure of April, May, and June divided by 3.
So,
396.25= (401.50 + 250.00 + x)/3
1188.75= 651.5 + x
x= 537.25
Answer:
Yes, the cost 
in dollars and the amount of yogurt 
are proportional.
The equation is: 
Step-by-step explanation:
1. If varies directly as , you can write it as following:
Where 
is the constant of proportionality.
2. Let's calculate the value of the constant of proportionality. If 
and 
, you have:
3. Then, the equation is:
4. Let's verify if they are directly proportional. Substitute 
which is the amount of yogurt bought by Jonah. The result must be $0,48:
5. They are directly proportional.
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× = 25/99
Step-by-step explanation:
x = 0.2525..... (1)
then ; 100x = 25.2525... (2)
(2) - (1) gives
x (100 -1) = 25
x = 25/99
Answer:
BC= 3
Step-by-step explanation:
Suppose a line BD is 10 and it has a point C somewhere on the line. It is given that BC is 3times and CD is 7 times or algebraically if we take x as a variable then according to the given information
BC+ CD= BD
3x+ 7x= 10
10x= 10
x= 10/10
x= 1
3x would give 3 (1)= 3
Hence the Line BC = 3
and the line CD= 7
