In January, the depth of a lake was 812 feet. In August, the depth of the lake was 446.6 feet. What is the percentage decrease of the depth of the lake from January to August?

45%

Step-by-step explanation:

To find the percentage decrease, we need to find the decrease first.

Decrease = 812 - 446.6

                = 365.4

Percentage decrease = × 100%

                                    = 45%

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step-by-step explanation:

the solution is the point

step-by-step explanation:

we have

> equation a

> equation b

adds equation a and equation b

substitute the value of x in equation b to find the value of y

the solution is the point