Answer: It will take her 15 more hours to finish the book.
Step-by-step explanation:
25% : 5h
50% : 10h
75% : 15h
100% : 20h
It would take 20 hours to complete the book, but because she already read for 5 hours, it would be 15 to finish the book.
The given expression becomes undefined when y=5 or y = -3. The answer is option D.
Step-by-step explanation:
The value of the given expression becomes undefined when the denominator equals 0.
Hence to find the value of y which makes the expression undefined, we can equate the value of the denominator to zero and solve it .
Step 1
Equate the denominator to 0.
y^{2} - 2y -15 = 0
Step 2
Solve the above equation to get the value of y.
y^{2} - 2y -15 = 0
=> (y-5)(y+3) =0 [ Roots of the quadratic equation]
=> y = 5 or y = -3.
Hence when y = 5 or y = -3 the denominator becomes 0, which makes the expression (2y+7)/0 and hence it is undefined.
Evaluate -a+(-b)−a+(−b)minus, a, plus, left parenthesis, minus, b, right parenthesis where a = 6.05a=6.05a, equals, 6, point, 05
swat32
Answer: 
Step-by-step explanation:
Here the given expression, 
Where 
and 
By putting the given values of a and b in the given expression,
We get,
9 is the value of each side. There are 7 sides so 63 divided by 7 is 9.
