<h3>
Answer: 15</h3>
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Explanation:
n = number of new flash cards practiced
2n = number of old flash cards practiced
The 2n is due to the fact that the number of old flash cards is double that of the new ones (eg: 10 is twice that of 5).
The two expressions must add to 45.
new + old = total
n + 2n = 45
3n = 45
n = 45/3
n = 15
2n = 2*15 = 30
Noah practiced 15 new flash cards and 30 old flashcards which is a total of 15+30 = 45. This confirms our answer.
Also note that the ratio of new to old is 15:30 which reduces to 1:2, then we can multiply both sides by 5 to get 5:10. This effectively shows that 15:30 and 5:10 are the same equivalent ratio (just in different forms). This helps confirm our answer.
That's the cosine x. The cosine of 0 is 1, so that's how you can tell. The sin of 0 is 0, so that's where the sin graph goes through the y axis
Answer:
a regular polygon has all angles measure sum up to 360 degrees so each interior angle = sum of alll angles/no.of sides so it is 360/10= 36 degrees hope its clear now
Step-by-step explanation:
Answer:
8
Step-by-step explanation:
6(6)-20-32(1/4)
36-20-8
16-8
8
Answer:
1 to 100,000
Step-by-step explanation:
Centimeters and kilometers are scales of the official unit of length in the SI, the meters.
In a meter there are 100 centimeters, and in a kilometer there are 1000 meters, so in a kilometer there are 1000(100)cm ⇒ 100,000cm
So the scale of 1 centimeter to 1 kilometer is:
1 to 100,000
