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Mrac [35]
3 years ago
14

Help me plz I’ll give 20 points

Mathematics
1 answer:
Lubov Fominskaja [6]3 years ago
3 0

Answer:

i research and find the answer

Step-by-step explanation:

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A long distance runner does a first lap around a track in exactly 50 seconds.As she tires.Each subsequent lap takes 20% longer t
madreJ [45]

Answer:

182 seconds

Step-by-step explanation:

Given:

Time taken for first lap is 50 seconds and each subsequent lap takes 20% longer than previous

Solution:

Time taken for first lap = 50 sec

For second lap

Each subsequent lap takes 20% longer than previous

Previous lap time = 50 sec

second lap = 50 + 20% of 50

second lap =50+(\frac{20}{100}\times 50)

second lap = 50 + 10

second lap = 60\ sec

For third lap

Each subsequent lap takes 20% longer than previous

Previous lap time = 60 sec

Third lap = 60 + 20% of 60

Third\ lap = 60 + (\frac{20}{100}\times 60)

Third\ lap = 60+2\times 6

Third\ lap = 60+12

Third\ lap = 72\ sec

Time taken for 3 laps is equal to sum of all three laps time.

Tiem\ taken\ for\ 3\ lap = 50+60+72

Tiem\ taken\ for\ 3\ lap = 182\ sec

Therefore, it takes 182 seconds (3 min, 2 seconds) to run three laps

6 0
4 years ago
True or False:<br><br> An improper fraction will equal greater than 100 percent.
Ivan
True I did this in class
6 0
3 years ago
In the following diagram, HI is parallel to JK. What is the measure of x?
Vilka [71]

Answer:

60

Step-by-step explanation:

find the missing angle in triangle HAI =60.

VERTICALLY OPPOSITE ANGLES ARE EQUAL.=60

Angle x is alternating with the angle.

8 0
3 years ago
Read 2 more answers
Simplify the expression where possible. (r 3) -2
Julli [10]
What you do to on side of an equation (=) you must do to the other to keep both sides equal.

r3-2+2=+2  (add 2 to both sides of the equation to simplify the left side)
which becomes
r3=2
r3/3 = 2/3 (divide both sides by 3) Note 3/3 =1 and 1 r is the same as r
which becomes
r=2/3 .
5 0
3 years ago
Add.
Juli2301 [7.4K]

Answer:

O D. 3x2 + 2x-3

4 0
3 years ago
Read 2 more answers
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