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Nadya [2.5K]
3 years ago
15

PLZ HLP ME I BEG!!! 13 POINTS 1. During a trip, Amy had to take two different trains. Her first train traveled for 3hrs and the

second train traveled for 4hrs Combined, the trains traveled 625 miles If the equation 3m + 4n = 625 represents this situation, which statements are true regarding this equation? select two that apply a. The variable m in the equation represents the speed of the second train. b. The variable n in the equation represents the speed of the first train. c. The variable m in the equation represents the speed of the first train. d. The variable n in the equation represents the number of hours Amy traveled on the second train. e. The variable m in the equation represents the number of hours Amy traveled on the first train. f. The variable n in the equation represents the speed of the second train. 2. What is the point-slope form of the equation for the line with a slope of −2 that passes through the point (4,−6)? a. y+6=−2(x−4) b. y−4=−2(x+6) c. y=−2x−6 d. y−6=−2(x+4) 3. Examine the following table that represents some points on a line. x | -6, -4, 6 y | -10, -9, -4 Which equations in point-slope form represent this line? Select all that apply. a. y+9=1/2(x+4) b. y+4=1/2(x−6) c. y+10=1/2(x+6) d. y+10=2(x+6) e. y+4=2(x−6) f. y−9=2(x−4)
Mathematics
1 answer:
Wewaii [24]3 years ago
6 0
I’m pretty sure it’s c and d
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Allisa [31]

Step-by-step explanation:

Let "c" be the original number of classrooms.

The 1200/c was the original number of students per classroom.

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Equation:

1200/(c-4) = (1200/c)+10

Multiply thru by c(c-4)

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1200c = 1200(c-4)+10c(c-4)

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1200c = 1200c-4800 + 10c^2-40c

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10c^2-40c-4800 = 0

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Factor:

(c-24)(c+20) = 0

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Positive solution:

c = 24 (# of classrooms originaly planned)

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2 years ago
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Answer:

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Step-by-step explanation:

0.72 is ten times as much as 0.072.

0.072 times 10 is .72.

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5 0
3 years ago
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natita [175]

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Answer:

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5 0
3 years ago
URGENT!!!!!
Anna11 [10]

h=20w

in one week hector works 20 hours

in two hector works 40 etc


h = hours and w = weeks. the money is just extra information.

h=20w works because if it has been two weeks we substitute the w with the number 2 and can solve

h=20(2)

h=20x2

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This proves that the equation is true

7 0
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