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xxTIMURxx [149]
3 years ago
8

glenn races his motorcycle 30 times last season. he finished first 12 times, second 5 times and crashed in 9 races. what percent

of the races did he crash? set up a proportion and solve.
Mathematics
1 answer:
zaharov [31]3 years ago
4 0
We know that

[<span>percent of the races did Glenn crash]={[races crashed]/[total races]}*100
</span>[percent of the races did Glenn crash]={[9]/[30]}*100
[percent of the races did Glenn crash]=[0.30]*100=30%

the answer is 30%
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The aspect ratio is used when calculating the aerodynamic efficiency of the wing of a plane. For a standard wing area, the
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Answer:

Y=s^2/36 and y=5.7;14.3 ft

Step-by-step explanation:

The question was not typed correctly. Here, a better version:

<em>The aspect ratio is used when calculating the aerodynamic efficiency of the wing of a plane for a standard wing area, the function A(s)=s^2/36 can be used to find the aspect ratio depending on the wingspan in feet. If one glider has an aspect ratio of 5.7, which system of equations and solution can be used to represent the wingspan of the glider? Round solution to the nearest tenth if necessary.  </em>

<em> </em>

<em>Y=s^2/36 and y=5.7;14.3 ft </em>

<em>Y=5.7s^2 and y=36; s=2.5ft </em>

<em>Y=36s^2 and y=0; s=0.4 ft </em>

<em>Y=s^2/36 +5.7 and y=0; s=5.5 ft</em>

In the function A(s)=s^2/36 A(s) represents the aspect ratio and s the wingspan. If one glider has an aspect ratio of 5.7, then A(s) = 5.7. We want to know the wingspan of the glider. Replacing A(s) by Y we get the following system of equation:

Y=s^2/36    

with y = 5.7

5.7 = s^2/36    

5.7*36 =  s^2

√205.2 = s

14.3 ft

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Answer: t=20°


Step-by-step explanation:

1. By definition, the sum of the interior angles is 180 degrees.

2. Keeping the information above on mind, you can write the following expression:

90+50+2t=180

3. Now, you must solve for t as following:

140+2t=180\\2t=180-140\\2t=40\\t=\frac{40}{2}\\t=20

4. Therefore, the value of t is 20°


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Step-by-step explanation:

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