The equivalent expression is b)
The second one
Jack can swim 12 laps in 28 minutes. 28 minutes is 4 times greater than the time it took him to swim 3 laps. With 28 minutes he should therefore be able to swim 4 times as many laps. 3 times 4 equals 12
1. The two triangles are similar because the two pairs of angles are equal, therefore the third angles of both triangles must also be equal.
We can call this the AAA similarity criterion
2. To find QR, we must use ratios between 2 known similar sides of both triangles,

So, QR =1.02
<span>1.The LCM is their product. The LCM of 4 and 9 is 36.
</span><span>2.If two numbers have no common factor greater then one, then their LCM is the two
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