Answer:
B, D
Step-by-step explanation:
Solve all equations:
A.
This is false equality, so this equation has no solutions.
B.
This equality is true for all values of x, so this equation has infinitely many solutions.
C.
This equation has the unique solution.
D.
This equality is true for all values of x, so this equation has infinitely many solutions.
E.
This equation has the unique solution.
Answer:
-
Step-by-step explanation:
Step 1: Add the numerator fractions.
2/5 + 3/10
Here we have to find LCD, the LCD of 5 and 10 is 10
(2*2) + 3 4 + 3
Therefore, 2/5 + 3/10 = --------------- = ------------------
10 10
= 7/10
Step 2: Now substitute 2/5 + 3/10 = 7/10 in the given fraction, we get
7/10
= ----------
-7/9
If we have fraction over fraction, we have to find the reciprocal of denominator fraction and multiply.
The reciprocal of -7/9 is -9/7
Step 3: Now multiply 13/10 and -9/7
= (7/10) x (-9/7)
= -9/10
=-9/10
The answer is -
