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2 years ago

A motorist travels 160 km at 80 km/h and 160 km at 100 km/h. What is the average speed of the motorist for this trip?.

Mathematics

1 answer:

suter [353]2 years ago

8 0

Analyze problem

since the distance is the same, we will not need to do any solving in that part

so, the average of 80 and 100 is

(80+100)/2

which is 90

so, 90 miles per hour

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Solve for x. (RIGHT ANSWER WILL GET BRAINLIEST)

puteri [66]

Answer:

Step-by-step explanation:

The angle with x in it is a vertical angle to the other one labeled & the right angle put together.

Therefore:

48 + 90 = 2x + 4

Solve for x:

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Hope this helps! Have a great day!

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2 years ago

the line joining A(a, 3) to B(2 -3) is perpendicular to the line joining C(10,1) to B. The value of a is?

RideAnS [48]

Well, first off, let's find what is the slope of BC

$\bf \begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
% (a,b)
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% (c,d)
C&({{ 10}}\quad ,&{{ 1}})
\end{array}
\\\\\\
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\\\\\\
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now, a line perpendicular to that one, will have a negative reciprocal slope, thus

$\bf \textit{perpendicular, negative-reciprocal slope for slope}\quad \cfrac{1}{2}\\\\
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now, we know the slope "m" of AB is -2 then, thus

$\bf \begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
% (a,b)
A&({{ a}}\quad ,&{{ 3}})\quad 
% (c,d)
B&({{ 2}}\quad ,&{{ -3}})
\end{array}
\\\\\\
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\\\\\\
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2 years ago

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MA_775_DIABLO [31]

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Step-by-step explanation:

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Step-by-step explanation:✨

✨~hope this helps~✨

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Snezhnost [94]

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