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Rudik [331]
3 years ago
5

There are 80 runners to start a race. IN the first half of the race, 1/4 of them dropped out. In the second half of the race , 1

/5 of the remaining dropped out. How many runners finished the race?
Mathematics
1 answer:
mihalych1998 [28]3 years ago
5 0

Answer:

48

Step-by-step explanation:

80 divided by 4 is 20 so thats 1/4 of 80

80-20=60

1/5 of 60 = 12

20+12=32

80-32=48

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Divide x to the 1 half power divided by x to the 2 sevenths power.
juin [17]

\frac{x^\frac{1}{2} }{x^\frac{2}{7}}

According to the rule of exponents \frac{a^m}{a^n} = a^{(m-n)} , i.e. when two terms are in division with same base , we subtract the exponents

So

\frac{x^\frac{1}{2} }{x^\frac{2}{7}} = x^{(\frac{1}{2}) - (\frac{2}{7})}

=x^\frac{3}{14}

Or

x to the 3 fourteenths power

5 0
3 years ago
The measures of the angles of a triangle are shown in the figure below. Solve for x.
Daniel [21]
Answer: x = 11 degrees

Step by step explanation:
Triangle rule states that all angles of a trundle must equal to 180 degrees. So we have two known angles, therefore we can subtract them from the 180 degree total.
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We add 16 to both sides to isolate x
4x=44
Now we divide each side by 4 to get rid of the coefficient
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6 0
3 years ago
Tanya is training a turtle for a turtle race. For every 1/6 of an hour that the turtle crawling he can travel 2/23 mile. at what
zavuch27 [327]
So first I hope this helps! But from what I’ve learned in school is that a unit rate pretty much just mean *1... so in words the answers would be 1/6 and hour for every 2/23 miles
8 0
3 years ago
Work out the value of angle x
AleksandrR [38]

Answer:

Its an Isosceles triangle. The two bases are equal

So

x= 180-(62+62)

x=56°.

5 0
2 years ago
Read 2 more answers
Find the value of x?
Burka [1]

Answer:

<em>We </em><em>know </em><em>that </em><em>the </em><em>exterior </em><em>angle </em><em>of </em><em>a </em><em>triangle </em><em>is </em><em>equal </em><em>to </em><em>the </em><em>sum </em><em>of </em><em>two </em><em>opposite</em><em> </em><em>interior </em><em>angle. </em>

Step-by-step explanation:

So

25x + 57 + x = 45x

26x + 57 = 45x

57 = 45x - 26x

19x = 57

Therefore x = 3

Hope it will help you

3 0
3 years ago
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