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coldgirl [10]
3 years ago
8

Lauren and minki are in a bike race. Lauren bikes at 18 miles per hour. Minki bikes at 12 miles per hour and has a 6-mile head s

tart. Write the system of equations that represents each persons distance. Let d represent the distance and t represent the time
Mathematics
1 answer:
Alex787 [66]3 years ago
5 0

Answer:

For Lauren - d = 18t

For Minki - d = 6 + 12t

Step-by-step explanation:

Given The speed of Lauren  is 18 miles per hour and the speed of Minki is 12 miles per hour

Also Given that Minki got a head start of 6 miles

For Lauren

Speed=\frac{distance}{time}

18=\frac{d}{t}

d = 18t

For Minki

Speed=\frac{distance}{time}

12=\frac{d}{t}

d = 12t

Also given that he had a 6 miles headstart

Therefore the equation becomes

d = 6 + 12t

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Over [174]

To answer this question, we need to recall that: "the diagonals of a rectangle bisect each other"

Thus, if we assign the point of intersection of the two diagonals in the rectangle as point O, we can say that the triangle OQR is an "isosceles triangle". Note that this is because the lengths OR and OQ are equal since we know that: "the diagonals of a rectangle bisect each other". See the below diagram for clarity.

Now, we have to recall that:

- the base angles of any isosceles triangle are equal. This is a fact, and this means that the angles

- also the sum of all the angles in any triangle is 180 degrees

Now, considering the isosceles triangle OQR, we have that:

\angle OQR+\angle ORQ+\angle ROQ=180^o

Now, since the figure already shows that angle m\angle2+\angle ORQ+50^o=180^oNow, since we have established that the base angles m\angle2+m\angle2+50^o=180^owe can now solve the above equation for m<2 as follows:

\begin{gathered} m\angle2+m\angle2+50^o=180^o \\ \Rightarrow2m\angle2+50^o=180^o \\ \Rightarrow2m\angle2=180^o-50^o \\ \Rightarrow2m\angle2=130^o \\ \Rightarrow m\angle2=\frac{130^o}{2}=65^o \end{gathered}

Therefore, the correct answer is: option D

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1 year ago
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Yes this is the best kind of question
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You build a fence around garden that measures 10 x 15 feet; how many feet of chain link fence will you need?
Neporo4naja [7]

Answer:

50 feet

Step-by-step explanation:

We have to find the perimeter of the fence surrounding the garden.

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Step-by-step explanation:(-x)(5y)(-2x)

=(-5xy)(-2x)

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therefore,the coefficient of the equation is 10.

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3 years ago
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AleksandrR [38]

Answer:

Since this is a right triangle with one angle and hypotenuse given and opposite side unknown, we can use the definition of sine to find the unknown side.

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