impura12713
16.12.2020 •
Mathematics
A disk has a diameter of 23cm the inner hole in the disk has a radius of 2 cm find the circumference of both the inner hole in the entire disk round to the nearest whole centimeter.
inner hole:6cm; whole disc, 72cm
inner hole: 13cm; whole disc, 144cm
inner hole: 6cm; whole disc, 144cm
inner hole: 13cm; whole disc, 72cm
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Ответ:
The correct answer is "B", we first need to add 40 to both sides of the equation.
Step-by-step explanation:
Since we have the following quadratic equation:
The first step to solve it is to isolate the independent variable, "x". To do that we must add +40 on both sides of the equation, since that way the "-40" on the left will be gone in a way that maintains the validity of the equation as shown below:
After this step we take the square root of both sides:
Therefore the correct answer is "B".