Answer:
45 apps
Step-by-step explanation:
1 minute has 60 seconds
If 12 seconds equals to 9 apps
60 seconds equals to x apps
Cross multiplying

Therefore, Dean downloads 45 apps in 1 minute
Answer:
x(3x+14)
Step-by-step explanation:
what do those terms share? they share the letter "x"
therefore we multiply x by 3x^2/x + 14x/x
3x^2/x = 3x and 14x/x = 14
Because when divided a fraction u must flip a fraction and cross multiply
1/2÷5/6
1/2×6/5
3/5
In order to make b the subject of this equation, we must isolate it on the left side. We can do this by following these steps:

Subtract b from both sides


Subtract P from both sides


Now, we have isolated b, but it is negative. We can fix this by multiplying both sides of the equation by -1.


Which is your final answer.

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Hope that helped! =)