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ladybugys
24.09.2019 •
Mathematics
6.4x + 3y=36 when x=3
a. 5
b. 9
c. 6
d. 8
Solved
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Ответ:
y = 5.6
Step-by-step explanation:
6.4x + 3y=36 when x=3
Substituting for x:
6.4*3 + 3y = 36
19.2 + 3y = 36
3y = 36 - 19.2
3y = 16.8
y = 5.6.
Ответ:
Step-by-step explanation: First we substitute x as 3
then,the equation will be 4×3+3×y=36(we should no that there is a hidden multiplication sign between 4 and x (3) and 3 and y)
also between 4x and 3y there is a hidden multiplication signthen we can simplify the equations as 12+3y=36
if we want to make the unknown number that is 3y independent we must remove 12.How do we do it? we know that + and - gives neutral so
12-12+3y=36-12(now we have put 12 to the other side making the unknown value independent.Also infront of 12 there is an invisible + sign)
now we can simplify it further +12-12=0
3y=36-12
3y=24
now to find y we have to remove 3 from it .we know its 3×y, right
so if we do the opposite sign 3 will get removed
then 3y ÷3=24÷3 (why i divided 24 also by 3 is , if i add a mathematical equation to one term of the equation i have to do it for others too)
then the equations will be y=8
and the answer is D
Ответ:
So how many times can you get 94.2 inces from 1 mile?
How many inches are there in 1 mile?
1 mile = 5280 feet and...
1 foot = 12 inches., so...
1 mile = 5280ft.(12in./ft)
1 mile = 63,360 inches. Finally, you will divide 63,360 inches by 94.2 inches per revolution.
63360%2F94.2+=+672.6revolutions per mile :)
Step-by-step explanation: hope this helped