Okay, this looks scary, but it's actually pretty easy. To help, we will use an acronym called PEMDAS, which will tell you how to use the order of operations.
Now, when it comes to multiplication and division, you do them in the order you see them. But, they always come before addition and subtraction, which follow the same rule.
Let's take a look at the problem now: 14+7×54÷6-7
There are no parentheses or exponents, so we don't have to worry about that. I see multiplication and division, though.
7×54 is first, the product is 378.
14+378÷6-7 There is a division problem now: 378÷6, the quotient is 63.
14+63-7
It looks much easier to solve now, doesn't it?
Add 14 and 63, the sum is 77.
77-7= 70
That's how you solve order of operations, message me if you need any more help with HW! :)
After 28 mins you've gone 4 miles, assuming this rate is constant and you dont slow down or speed up, in order to get to 20 miles you will have run 5x as much (20/4 = 5), thus 5x the amount of time (28x5).
