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Thepotemich [5.8K]
3 years ago
9

I need help with these

Mathematics
1 answer:
Ksenya-84 [330]3 years ago
4 0

Answer:

2. 20 oranges

3. 18 yellow tulips

4. 23 students

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Jane needs $20 to buy her radio.She has saved $15. What percent of the cost of the radio has she saved?
Katyanochek1 [597]

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70%

Step-by-step explanation:

15/20 is simplified to 3/4

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Light travels at 186,000 miles per second. How many FEET does it travel in a microsecond? (A microsecond is a millionth of a sec
Maslowich
1 mile is 5,280 ft, and 1 second has 1,000,000 microseconds.
So 186,000 miles per second multiplied by 5,280 feet per mile gives 982,080,000 feet per second.
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3 years ago
Within 11 years, the age of Peter will be half the square of the age he was 13 years ago. Calculate the current age of Peter. Re
OLga [1]

Answer:

21

ctto JBarnum

Step-by-step explanation:

P+11=(1/2)(P-13)^2

P+11=(1/2)(P^2-26p+169)

2(P+11)=(1/2)(2)(P^2-26p+169)

2P+22=P^2-26p+169

0=P^2-28p+147      ( -7 and -21)

(P-7)(P-21)=0

P=7,21                     (cant be 7 as 13 years from 7 is negative so peter is 21)

checking:

21+11=32

32=(1/2)(21-13)^2

32=(1/2)(8)^2

32=(1/2)64

32=32

correct

4 0
3 years ago
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