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y =5

Step-by-step explanation:

2y + 4y = 30

6y = 30

Divide both sides by six

y = 30/6

y = 5

= 5

Explain: Combine like terms

3 0 = 2 + 4

30=6y

Divide both sides of the equation by the same term

3 0 = 6

30/6 = 6y/6

Simplify:

1)Divide the numbers

2)Cancel terms that are in both the numerator and denominator

3)Move the variable to the left

= 5

eve and marks ratios are equivalent

step-by-step explanation:

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m