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Hatshy [7]
3 years ago
7

Mr. Plum's math class of 25 students had an average of 85 on a test. Miss Scarlett's class of 22 students had an average of 87 o

n the same test. What is the average of the two classes combined?
Mathematics
2 answers:
Monica [59]3 years ago
6 0
Use ((85x25)+(22x87))/ 47 for this to get the answer of about 86 (rounded)
maria [59]3 years ago
3 0
Add the two averages together and then divide it by 2. Thats your answer.
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Mariana [72]

Answer:

-4

Step-by-step explanation:

-6 - 2 = -4

3 0
3 years ago
1) Are the following lines parallel, perpendicular, or neither?
Maru [420]
In 1)

Line 1 has following coordinates.
(0,0) ; (1,-2) ; (2,-4)

Line 2 has following coordinates.
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Line 3 has following coordinates.
(0,1) ; (1,1.5) ; (2,2)

If you'll draw the lines, you'll observe that Line 1 is perpendicular to Line 2 and Line 3 and Line 2 and Line 3 are parallel to each other.

So,
Option D will be correct.

5 0
3 years ago
An expression 20x + 35y What is the greatest common factor
jekas [21]

Answer:

5

Step-by-step explanation:

20x   = 2  \times 2 \times 5 \times x\\ 35y = 5 \times 7 \times y

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8 0
3 years ago
A Crane Lifts a load of 4000N to a height of 20m in 5 seconds. Calculate the power of the Crane in horse power​
Digiron [165]

Answer:

2.54379284 hp.

Step-by-step explanation: Torque is defined as the engines rotational force.  First we find the distance =  m in equation- then we use the formula Power = work/time = 16.7/ 5 = 3.34 and Horsepower formula is given by. Horsepower = (Torque × Speed) / 5252. HP = (3.34 × 4000) / 5252. HP = 13360/5252. HP = 2.54379284 hp.  

Given :    W=4000    m=?        h=20 m                      

Time of operation         t =5 s

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Power required         P=  W/t   =  w/p = 120000/120 =1000 watts    We divide 60/5 = 120 then divide by 10 = 12 (being g)

3 0
2 years ago
8. The difference between two numbers is 14. If 1/3of the larger number is subtracted from the smaller number, the
Serjik [45]

Answer:

The values of the 2 numbers whose sum is 13 and difference is 3, are: {8 ; 5}.

Step-by-step explanation:

7 0
3 years ago
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