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Elanso [62]
3 years ago
13

I need help.like now please help me !!!!!!!!!

Mathematics
1 answer:
koban [17]3 years ago
7 0
Use proportions for all of them, for #1 use the proportion 12/30 = 9/a based on corresponding sides and then cross multiply. a=22.5 For #2 use the proportion y/35 = 64/40 based on corresponding sides and then cross multiply, y=56 For #3 use the proportion 42/? = 54/36 and then cross multiply, ?=28
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Is 1/4 the answer to this what ratio forms a porportion with 8/36
Svetlanka [38]
No.
1/4 would be proportional to 9/36.

8/36 can be simplified to 4/18, and further reduced to 2/9.
3 0
3 years ago
Calculate: 1/1x3+1/3x5+…+1/47x49
shtirl [24]

Answer:

24/49

Step-by-step explanation:

3 0
2 years ago
The perimeter of a parallelogram is 180 cm. One side exceeds the other by 10 cm. What are the lengths of adjacent sides of the p
Georgia [21]

Answer:

one side is 40 other is 50

Step-by-step explanation:

perimeter=180cm

let one side=length=x

Acc. to condition:

other side=width=x+10 (one side exceed other by 10)

perimeter= 2(length+width)

subtitue all values given above:

180=2(x+x+10)

180=2(2x+10)

2x+10=180/2

2x+10=90

2x=90-10

2x=80

x=40

now

lenght=x=40cm

width=x+10=40+10

width=50cm

8 0
3 years ago
Alexa and Brent are each working on a 30-question assignment. Alexa completed 20% of the questions. Brent completed 30% of the q
Mandarinka [93]
So 20% of 30 is 6
30% * 30 is 9
Alexa completed 6 of 30 questions 
Brent completed 9 of 30 questions

Brent completed 3 more questions than Alexa

Hope this helps :)
6 0
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Match each root with its meaning.
IRISSAK [1]
Port is to carry
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