Answer:
Lina’s solution is correct because it expresses 126 as a product of prime factors.
Step-by-step explanation:
Given :
Lina Josh
126 126
/ \ / \
3 42 2 63
/ \ / \
6 7 9 7
/ \
2 3
Solution:
Since Josh didn't solved it further as 9 can be written as further.
So, Josh's solution is incorrect.
Hence option A is correct.
Lina’s solution is correct because it expresses 126 as a product of prime factors.
Answer:
C
Step-by-step explanation:
First check if the triangle is right.
If the square of the longest side is equal to the sum of the squares on the other 2 sides then the triangle is right.
longest side = and (
)² = 12
2² + ( )² = 4 + 8 = 12
Thus the triangle is right → C
Answer:
9
Step-by-step explanation:
Find what both expressions have in common