Answer:
x=1.3288 or -1.1288
Step-by-step explanation:
Given 
Subtract 4x from both sides

Since we can factor out 2 from whole equation, let's factor out 2.

Divide with 2 on both sides

We got the quadratic equation, we can solve for x using quadratic formula.





It took him 1 hour and 30 mins .
He needs to go 15 miles. It takes him 1 hour to get 10 miles. After 1 hour has passed he still needs 5 more miles to go. 5 miles is half of 10 so half of 1 hour is 30 mins. 1 hour + 30 mins is 1 hour and 30 mins. (It took him 1 hour 30 mins)
Answer:
35
Step-by-step explanation:
apple: orange=2:5 = 10: x
x=5*10/2=25
total fruit= 10 apples + 25 oranges=35
Answer:
$625.
Step-by-step explanation:
Let x represent original cost of the guitar.
We have been given that after a 20% discount and 6% tax, a guitar cost $530.00. We are asked to find the original price of the guitar.
The cost of guitar after discount would be 80% (100%-20%) of x that is
.
The cost of guitar after tax would be cost of guitar after discount plus 6% of price after discount that is
.





Therefore, the original price of the guitar is $625.