25% = 0.25
124 x 0.25 = 31
31 students bought their lunch.
Part = 31
Percent = 25%
Whole = 124
Hope this helps! ✨
Out of the two parallelograms shown, we can say that A. Both I and II; congruent diagonals property.
<h3>Which of the shapes is a rectangle?</h3>
Rectangles can be proven to be rectangles by the congruent diagonals property.
This states that rectangles should be able to have diagonal lines extending from all sides within the rectangle that are perpendicular to each other.
These lines should bisect each other. As shown in the daigram, both shapes have that quality and so are both rectangles.
Find out more on the congruent diagonals property at brainly.com/question/1851850.
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<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.
