The number of questions in the test is 30
Step-by-step explanation:
Let's call the total number of questions in the test N.
We know that Laura answered 27 questions, and these 27 questions represent the 90% of the test.
Therefore, we can say that 27 is the 90% of N.
Re-writing the percentage as a fraction,
This means that:
And now we can solve for N to find the number of questions in the test:
Learn more about percentage:
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Answer:
the solution to this inequality is: (-6,∞).
Step-by-step explanation:
<em> " Isolating the variable means rewriting an equivalent equation in which the variable is on one side of the equation and everything else is on the other side of the equation ".</em>
<em>Here we are given an inequality as:</em>
<em> 4x + 4 > –20</em>
<em>so subtracting both side by 4 we have:</em>
4x>-20-4
4x>-24
x>-6 (dividing both side by 4)
Hence we get the solution on the number line as:
all those real number which are strictly greater than -6; In intervals we can write this as:
(-6,∞).
