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ASHA 777 [7]
2 years ago
11

PLS HELP!!! PLS MAKE SURE YOUR ANSWER IS 100% CORRECT!!! There are 84 students in a speech contest. Yesterday, 1/6 of them gave

their speeches. Today 4/7 of the remaining students gave their speeches. How many students still haven't given their speeches?
Mathematics
2 answers:
valentina_108 [34]2 years ago
6 0

Answer:

Step-by-step explanation:

7. 1/4 of 84 is 21, then 1/3 of that is 7

alina1380 [7]2 years ago
4 0

Answer:22 students

Step-by-step explanation:

1/6=7/42 of 84=14

4/7=24/42of 84 = 48

48+14=62

84-62=x

x=22

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Abcd is a rectangle if DB=26 and DC=24 find bc
Anettt [7]
Let's solve this problem step-by-step.

STEP-BY-STEP EXPLANATION:

Let's first establish that triangle BCD is a right-angle triangle.

Therefore, we can use Pythagoras theorem to find BC and solve this problem. Pythagoras theorem is displayed below:

a^2 + b^2 = c^2

Where c = hypotenus of right-angle triangle

Where a and c = other two sides of triangle

Now we can solve the problem by substituting the values from the problem into the Pythagoras theorem as displayed below:

Let a = BC

b = DC = 24

c = DB = 26

a^2 + b^2 = c^2

a^2 + 24^2 = 26^2

a^2 = 26^2 - 24^2

a = square root of ( 26^2 - 24^2 )

a = square root of ( 676 - 576 )

a = square root of ( 100 )

a = 10

Therefore, as a = BC, BC = 10.

If we want to check our answer, we can substitute the value of ( a ) from our answer in conjunction with the values given in the problem into the Pythagoras theorem. If the left-hand side is equivalent to the right-hand side, then the answer must be correct as displayed below:

a = BC = 10

b = DC = 24

c = DB = 26

a^2 + b^2 = c^2

10^2 + 24^2 = 26^2

100 + 576 = 676

676 = 676

FINAL ANSWER:

Therefore, BC is equivalent to 10.

Please mark as brainliest if you found this helpful! :)
Thank you and have a lovely day! <3
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andrew-mc [135]

Answer:

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Step-by-step explanation:

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