What is the awnser to 3 (4x12
2 answers:
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Answer:
Step-by-step explanation:
Mr.Mole's digging can be described by a linear model of general equation:
Where "m" is the rate at which he descends. Note that since the function A(t) measure his altitude relative to the ground, the rate "m" must be negative.
The constant "c" is his starting position. To find this value, assign the given data at t = 5 min to the equation above
Therefore, the function A(t) is described by the following formula:
Here is the equation:
In the equation, 6 is being multiplied by x - 8. There are two ways to solve this equation.
FIRST METHOD
<h3>You need to remove the parentheses by multiplying everything in the parentheses by 6.
Multiply:
Remember:
NEGATIVES
- Negative(-) times(×) negative(-) = positive(+)
- Negative(-) times(×) positive(+) = negative(-)
- Negative(-) divided(÷) by positive(+) = negative(-)
- Negative(-) divided(÷) by negative(-) = positive(+)
POSITIVES
- Positive(+) times(×) positive(+) = positive(+)
- Positive(-) times(×) negative(-) = negative(-)
- Positive(+) divided(÷) by positive(+) = positive(+)
- Positive(+) divided(÷) by negative(-) = negative(-)
Now combine the two values and rewrite the equation:
Since you're looking for x alone, you will need to remove the -48. This can be done by adding 48 to both sides, -48+48=0, which cancels it out).
Lastly, divide both sides by 6 to leave x alone.
SECOND METHOD
While the first step is somewhat complicated, there is a much easier way.
Start by dividing both sides by 6 to remove the number next to the parentheses.
(The 6 is cancelled out since 6 divided by 6 equals 1, and 1 × any number is that number).
Now you need to leave the variable alone, which can be done by adding 8 to both sides(-8+8=0 and -8 is cancelled out).
Either method can be used, but the second one is definitely shorter!
The answer is x = 20.