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Colt1911 [192]
3 years ago
8

HELP ME PLEASE AND EXPLAIN

Mathematics
1 answer:
Svetradugi [14.3K]3 years ago
5 0
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PLS HELP ME GUYS ASAP FOR 4, 5, 6, and 7 (SHOW WORK!!!) + LOTS OF POINTS!
oksano4ka [1.4K]
4)

12/16=21/b

multiply both sides by b
(12/16)b=21

now multiple both sides by (16/12)
b = 21 (16/12) =28

5)
rate is distance / time or time/distance

train travels 279 km per 1.5 hr =270/1.5
or
1.5 hr per 270 =1.5/27p

answer choice a and c matches that.
looking at choice C...270km/1.5hr=5hr/270km

looking at choice A.. 1.5hr/270km=5hr/k km

the units don't match for choice C so the

right answer is A

6)

1.5/270=5/k

multiply both sides by k
(1.5/270)k=21

now multiple both sides by (270/1.5)
k = (270/1.5)21= 900

7) 75 points per 6 game

75 points / 6 games

75/6=P/20

multiply both sides by 20
(75/6)20=P

P=250
8 0
3 years ago
How many area codes (ABC) would be possible if all three digits could be any value 3-9
wolverine [178]

Answer:

Step-by-step explanation:

4 0
2 years ago
12.7 = x – 3.8 help again
PilotLPTM [1.2K]

Answer:

x=16.5

Step-by-step explanation:

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16.5 = x

6 0
2 years ago
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Simplify the following expression.<br> 3x4 + 2x3 - 5x2 + 4x2 + 6x-2x-3x4 +7XS - 3X3
Sergio [31]

Answer:

39+4x

Step-by-step explanation:

Since two opposites add up to zero, remove them from the expression

2x3-5x+2+4x2+6x-2x+7x5

Calculate the sum or difference

39+6x-2x

5 0
2 years ago
Could anyone help me please 10x2y+4x2y
Lynna [10]

Answer:

The Answer is 28y

Step-by-step explanation:

4 0
2 years ago
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