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tester [92]
3 years ago
5

2) If 20 workers can build a house in 45 days, how many more workers are needed

Mathematics
2 answers:
Phoenix [80]3 years ago
7 0
It’s D 18 if wrong I’m sorry but I took this test as well
Helga [31]3 years ago
3 0

Answer:

B

Step-by-step explanation:

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2. Salvador has 10 cards, each with one number on
Karolina [17]

Answer:

<h2>15,120 number of ways.</h2>

Step-by-step explanation:

This is a permutation problem. Given the 10 cards with numbers 2, 3, 4,5,5,7,7,7,7,7 on it, if Salvador is going to make a row call, the number of ways he can order a row is as shown below;

Total number of cards = 10!

number of times the digit 5 was repeated = 2times

number of times the digit 7 was repeated = 5times

The number of ways he can make a row call = 10!/2!5!

= 10*9*8*7*6*5!/2*5!

=  10*9*8*7*6/2

=  10*9*8*7*3

= 15,120 different ways

Hence, the number of ways he can order the row is 15,120 number of ways.

5 0
3 years ago
Find JOM (I WILL MARK BRAINLY)
oee [108]
180-170=10 degrees
hope this helps :D
7 0
3 years ago
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The temperature of magnesium must be at least 650 degrees for the metal to melt. A sample of magnesium is currently 255 degrees.
Agata [3.3K]
The total temperature of the magnesium sample is its original temperature plus the temperature increase which is dependent on time. This total should exceed 650 degrees. Thus, the inequality that best describes the condition is,                
                                        255 + 10m ≥ 650
                                                   m ≥ 39.5
The answer is letter b. 
8 0
3 years ago
40 POINTS! + BRAINLIEST!
RideAnS [48]
36/6 = 6
so 
x = 42/6 = 7

answer
x = 7 cm
8 0
3 years ago
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I need this math question solved fast please!!!
beks73 [17]

Answer:

5 2/3

Step-by-step explanation:

3 0
3 years ago
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