Which of the following can be added without altering any of the fractions? a. 3x/x-1 + 8/x-1
b. 6x+1/4x-8 + 1/4x+1
c. 6x/x+6 + 6x/x-6
d. 6x/x-7 + x-7/6x

a

Step-by-step explanation:

+

These fractions have a common denominator and so do not require to be altered.

The numerators can be added to simplify, that is

=

The remaining fractions have different denominators and would require to be altered before they could be added.

13

step-by-step explanation:

169-1=168

168-3=165

165-5=160

160-7=153

153-9=144

144-11=133

133-13=120

120-15=105

105-17=88

88-19=69

69-21=48

48-23=25

25-25=0

since it took 13times to completely subtract it hence its square root is 13

i think it will be zero as slope has a formula of difference between initial and final distance divided by itz time interval