The length y of a rectangle is four less than three times the width x. The perimeter of the rectangle is 16 cm.
1 answer:
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Both terms have a 
in common, so we can pull it out. The factored form will be times whatever is left after pulling it out.
In the first term, we will have just 8 left since everything else in the term is factored out.
The second term has a
left. Notice that both of these terms no longer have a negative sign since the negative was factored out.
The answer is
In the first term, we will have just 8 left since everything else in the term is factored out.
The second term has a
The answer is
Answer:
80
Step-by-step explanation:
Initial ratio:
Teachers to students
1 : 15
Ratio after:
Teachers to students
3 : 40
The number of students did not change, so we can make the students of the initial ratio and the students of the ratio after the same.
1 : 15 = 8 : 120
3 : 40 = 9 : 120
120 units = 1200
1 unit =
Initial teachers = 8 units =