First either add or subtract the number in the parenthesis (3^2-4) which equals to 5

90/[10+5) add the number in the parenthesis again (always do the parenthesis first) [10+5]= 15.

lastly divide 90/15 which equals to 6
always remember (PEMDAS)

5 0

3 years ago

A runner is participating in a 10.3 mile race. If the runner stopped at a water station that is twice as far from the starting l

Rudik [331]

We have the representation of this problem in the figure below. As we have a 10.3 mile race, then the equation is fulfilled as:

$d = 10.3mi = d_{1}+ d_{2}$

We know that there is <span>a water station that is twice as far from the starting line as from the finish line, then:

</span> $d_{2}=2d_{1}$

So:

$d_{1} +2d_{1}=10.3$
∴ $d_{1}=3.43mi$

and $d_{2}=2(3.43)=6.86mi$

<span>Finally, the distance of the runner from the finish line is:
</span>
$6.86mi$

8 0

3 years ago

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