Answer:
b=2
Step-by-step explanation:
we have
9x+12y=21 -----> equation A
6x+8y=7b ----> equation B
we know that
If the system of equations have an infinite number of solutions then the equation A must be equal to the equation B
Multiply equation B by 1.5 both sides
1.5*[6x+8y[=7b*1.5
9x+12y=10.5b ----> equation C
Compare equation A and equation C
9x+12y=21 -----> equation A
9x+12y=10.5b ----> equation C
For the equations to be equal it must be fulfilled that
21=10.5b
solve for b
b=21/10.5
b=2
Answer:
rational
Step-by-step explanation:
7x = 40
7x + 4y = 40
The first equation represents that in total, the 7 tickets whether they are for adults or children costs $40.
The second equation represents that x = adult and y = children tickets both add up to equal $40.
1.5kg is 1500 grams.
Maria uses 50g a day, so to know how many days takes eating the whole packet just divide 1500 by 50.
Given: Car insurance premium in a first half year = $958
Car insurance premium in the second half year = $958
Total Car insurance premium in year = 2 × $958 = $ 1916
Nature of paid premium is bi-weekly = in 2 weeks
There are total 52 weeks in a year.
So, the total number of bi-week = 26
Total deposited amount per bi-weekly = $ 1916 ÷ 26 =$ 73.69 ≈ $ 74
Hence, the required amount bi-weekly will be $ 74. Therefore, option b. $ 74 is the correct option.
