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sergij07 [2.7K]
2 years ago
5

15 members of the Drama Club can make set decorations for their musical in 12 hours. After 4 hours have passed, a few teachers c

ame to help, and the group completed the remaining work in 6 hours. How many teachers helped?
PLEASE help!!! I WILL AWARD BRAINLIEST.
Mathematics
1 answer:
Serga [27]2 years ago
4 0

Answer:

5 teachers

Step-by-step explanation:

We know that the 15 members finished 1/3 of the job in 4 hours. When the teachers came they finished 2/3 of the job in 6 hours. So they finished 1/3 of the join in 3 hours of we simplify it.

4 hour: 15 minutes

3 hour: ?

15/3 x 4= 20 teaches. Then we do 20-15=5 because there were originally 15 members.

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In this activity, you'll calculate a probability and use it to predict the result of repeating a simple chance-based trial many
kompoz [17]
1) The outcomes for rolling two dice, the sample space, is as follows:
(1, 1), (1, 2), (1, 3), (1, 4), (1, 5), (1, 6)
(2, 1), (2, 2), (2, 3), (2, 4), (2, 5), (2, 6)
(3, 1), (3, 2), (3, 3), (3, 4), (3, 5), (3, 6)
(4, 1), (4, 2), (4, 3), (4, 4), (4, 5), (4, 6)
(5, 1), (5, 2), (5, 3), (5, 4), (5, 5), (5, 6)
(6, 1), (6, 2), (6, 3), (6, 4), (6, 5), (6, 6)
There are 36 outcomes in the sample space.
2)  The ways to roll an odd sum when rolling two dice are:
(1, 2), (1, 4), (1, 6), (2, 1), (2, 3), (2, 5), (3, 2), (3, 4), (3, 6), (4, 1), (4, 3), (4, 5), (5, 2), (5, 4), (5, 6), (6, 1), (6, 3), (6, 5).  There are 18 outcomes in this event.
3)  The probability of rolling an odd sum is 18/36 = 1/2 = 0.5
3 0
2 years ago
Read 2 more answers
Please help!!!!!!!!!
shepuryov [24]
A, the first one only, this parabola only has a minimum and no maximum.  the other statements are also just false 
7 0
2 years ago
Your school organizes a clothing drive as a fundraiser for your class trip. The school earns $100 for every 400 pounds of donati
noname [10]

Answer:

$550

Step-by-step explanation:

400x=2200, x is the number of groups needed to get 2200 pounds.

If you divide both sides by 400, you'll get x=5.5

Next, multiply 5.5 by $100 because each group gives $100

hope this helps!

4 0
1 year ago
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NOT is coded as LKF and FLY is coded as TNA, then which of the following word/s has/have correct coding? (1) TOP – FKJ (2) RUN –
AVprozaik [17]

Answer:

  • (1) and (3) are correct options

Step-by-step explanation:

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  • FLY is coded as TNA

<u>Using alphabet, we can see that:</u>

NOT = 14, 15, 20  ⇔ 13+1, 13+2, 13+7 ⇒ LKF = 12,11,6 = 13-1, 13-2, 13-7

Coding for each letter is 13 + x ⇒ 13 - x

(1) TOP ⇒ FKJ

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(2) RUN ⇒ IFM

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(3) MUG ⇒ MES

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(4) HOT ⇒ RKG

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7 0
1 year ago
The bottom of a 12-foot ladder is placed on the ground 7 feet from the base of a pipe sticking out of the ground. The top of the
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<span>Let x = length of pipe.
Use Law of Cosines to find x: x^2 = 7^2 + 12^2 -2(7)(12)cos(56.4) = 98.03; x=9.901.
Let y = angle between pipe and ground.
Use Law of Sines to calculate y.
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 Answer: 90 deg.</span>
4 0
2 years ago
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