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svetoff [14.1K]
3 years ago
8

Help help help with this question

Mathematics
1 answer:
ratelena [41]3 years ago
6 0
Your answer to that question would be the image A
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I don't know how to do this or what i'm doing plz help
mote1985 [20]

recalling that d = rt, distance = rate * time.


we know Hector is going at 12 mph, and he has already covered 18 miles, how long has he been biking already?


\bf \begin{array}{ccll} miles&hours\\ \cline{1-2} 12&1\\ 18&x \end{array}\implies \cfrac{12}{18}=\cfrac{1}{x}\implies 12x=18\implies x=\cfrac{18}{12}\implies x=\cfrac{3}{2}


so Hector has been biking for those 18 miles for 3/2 of an hour, namely and hour and a half already.

then Wanda kicks in, rolling like a lightning at 16mph.

let's say the "meet" at the same distance "d" at "t" hours after Wanda entered, so that means that Wanda has been traveling for "t" hours, but Hector has been traveling for "t + (3/2)" because he had been biking before Wanda.

the distance both have travelled is the same "d" miles, reason why they "meet", same distance.


\bf \begin{array}{lcccl} &\stackrel{miles}{distance}&\stackrel{mph}{rate}&\stackrel{hours}{time}\\ \cline{2-4}&\\ Hector&d&12&t+\frac{3}{2}\\[1em] Wanda&d&16&t \end{array}\qquad \implies \begin{cases} \boxed{d}=(12)\left( t+\frac{3}{2} \right)\\[1em] d=(16)(t) \end{cases}


\bf \stackrel{\textit{substituting \underline{d} in the 2nd equation}}{\boxed{(12)\left( t+\frac{3}{2} \right)}=16t}\implies 12t+18=16t \\\\\\ 18=4t\implies \cfrac{18}{4}=t\implies \cfrac{9}{2}=t\implies \stackrel{\textit{four and a half hours}}{4\frac{1}{2}=t}

7 0
3 years ago
What is the quotient of 42 divided by 9124
Sunny_sXe [5.5K]
<span>The answer is 0.0046032441911442</span>
4 0
3 years ago
Help Wegnerkolmp2741o i need ur help!
melamori03 [73]

Answer:

a

Step-by-step explanation:

4 0
3 years ago
Can yall help me with this?<br> Thank you!
Ray Of Light [21]

Answer:

<u>1260 degrees (1260°)</u>

Step-by-step explanation:

<u>Formula to Find Sum of Interior Angles of a Polygon</u>

  • 180 (n - 2)
  • n is the <u>number of sides</u> of the polygon

<u>Nonagon (9-sided polygon)</u>

  • 180 (9 - 2)
  • 180 × 7
  • <u>1260 degrees (1260°)</u>
4 0
2 years ago
M<br> /<br> n<br> (x), x not equal to
azamat

Answer:

In M/n(x) x cannot be 0

Step-by-step explanation:

If any number is divided by 0, then that number is undefined and has no answer, so in math this is always avoided by not dividing with 0.

4 0
3 years ago
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