Answer:
8.4 dollars
Step-by-step explanation:
The error is in the resolution of the proportion. In fact, the initial proportion is correct:

where x is the total cost. However, the following step of the resolution is wrong. In fact, the correct resolution is the following:
- Multiplying by x on both sides:

- Multiplying by 3.5 no both sides:

And now we can find x:

So, the total cost is 8.4 dollars.
Answer:
3 times x then minus 3 times y equal 2y plus 9
Step-by-step explanation:
Not sure if it works......
that's the verbal sentence (which is not formal sentence) i can think of now......
Answer:
a ) Square Root of 25 = 5
b ) Square Root or 81 = 9
c ) Square Root of 64 = 8
d ) Square Root of 169 = 13
Step-by-step explanation:
Hope this helps! <3
Answer:
10
Step-by-step explanation:
5+5=10
your answer is 10
I think it is 30 do not hate on me if it is wrong