Answer:
C
Step-by-step explanation:
X can't be negative cause it wouldn't make sense
When faced with an unknown variable in a maths problem, it is advised to find the subject formula and then use it to solve the equation to find the answer.
<h3>What is an Unknown Variable?</h3>
This refers to the type of variable in a given equation that has to be solved for because its properties or value is not known.
Hence, we can see that when faced with an unknown variable in a given math problem, it is better to find the subject formula, then input the value of this into an equation, to find the value of the variable.
Read more about unknown variables here:
brainly.com/question/2133551
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Answer:
c is the correct answer
Step-by-step explanation:
because i worked it out
Answer:
D
Step-by-step explanation:
Each factor on the right has to be multiplied by the equation on the left and then you add them.