Answer:
Step-by-step explanation:
Express this time interval in set notation:
15 ≤ t ≤ 20
This says that the waiting time will be between 15 and 20 minutes.
Answer:
sq root of 26
Step-by-step explanation:
One rule of an irrational number is that it cannot be written as an whole fraction, since the other two are fractions, the last must be irrational.
Answer:
x = 4
which agrees with the third listed answer among the given options
Step-by-step explanation:
We can re-write the logarithmic equation using the properties of logarithms:

Therefore, the arguments of the log functions must also be equal (and we can solve for "x" by noticing that this expression is the perfect square of a binomial:

and for this equation to verify, x must be 4
Answer:
The measure of the missing angle is 90°
Step-by-step explanation:
∵ This figure is a quadrilateral
∴ the sum of measures of its angles = 360°
∴ m∠x = 360 - 107 - 72 - 91 = 90°
There are no factors of 20 that add up to 7.
Factors of 20 are:
1*20
2*10
4*5