The sum of three numbers is 123. The second number is 8 more than the first. The third number is 3 times the first. What are the
1 answer:
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Answer: The correr solution is
Step-by-step explanation:
Since the steps in Lin's solution are not shown, we are not able to find her erros. However, we can solve it step by step and find the correct result:
Firstly, in the left part of the equation we have to multiply by the numbers inside the parenthesis; and in the right side we have to solve first what is inside the parenthesis:
Adding similar terms in the left side and multiplying by the number inside the parenthesis in the right side:
Isolating :
This is the correct solution
Make a proportion.
Do base over height;
.
h is the height of the second triangle. Solve for h.
Cross multiply.
6h = 168
h = 28
The height of the second triangle is 28 cm.
Do base over height;
h is the height of the second triangle. Solve for h.
Cross multiply.
6h = 168
h = 28
The height of the second triangle is 28 cm.