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Answer :
Let's solve each part of the question step-by-step.
If a certain number is multiplied by 15, the result is 150. What is the number?
Let the certain number be [tex]x[/tex]. According to the problem:
[tex]15x = 150[/tex]
To find [tex]x[/tex], divide both sides by 15:
[tex]x = \frac{150}{15} = 10[/tex]
So, the number is 10. Therefore, the correct choice is B. 10.
If [tex]4x + 11 = 11[/tex], what is the value of [tex]x[/tex]?
Start by isolating [tex]x[/tex] on one side of the equation:
[tex]4x + 11 = 11[/tex]
Subtract 11 from both sides to eliminate the constant:
[tex]4x = 0[/tex]
Now, divide by 4 to solve for [tex]x[/tex]:
[tex]x = \frac{0}{4} = 0[/tex]
Hence, [tex]x[/tex] is 0. The correct choice is A. 0.
What is 50% of 10?
To find 50% of a number, divide the number by 2 (since 50% is equivalent to half):
[tex]50\% \text{ of } 10 = \frac{10}{2} = 5[/tex]
Therefore, 50% of 10 is 5. The correct choice is B. 5.
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