How do you solve this equation: 2 1/2 + -2 3/5

It equals -1/10

Step-by-step explanation:

Eliminating a negative and changing our operation.

2 1/2− 2 3/5

Rewriting our equation with parts separated

=2+1/2−2−3/5

Solving the whole number parts

2−2=0

Solving the fraction parts

1/2−3/5=

Find the LCD of 1/2 and 3/5 and rewrite to solve with the equivalent fractions.

LCD = 10

5/10−6/10= −1/10

Combining the whole and fraction parts

0−1/10=1/10

Conclusion:

-1/10

i do not know the answer

step-by-step explanation:

1. sometimes

2.   never

3   .08c = 7.50+.05c   250 pages

step-by-step explanation:

1.   sometimes

the theoretical probability of rolling a 1 is 1/6.   perhaps you got really lucky and never rolled a 1   in those 60 times.   your experimental probability is 0.   or perhaps you rolled a 1   20 times.   your experimental probability is 20/60 is 1/3.     it really just depends on how you rolled in that experiment.

2.   never

the probability of the event occurring is 1.   that is being 100 % sure it will happen.   that is the maximum amount of confidence we have.

3.   no customer card cost:   .08 times number of pages

customer card cost:   7.50 + .05 times number of pages

we want to find when it costs the same amount, so we will set these equal

let c = number of pages

.08c = 7.50+.05c

subtract .05c from each side

.08c-.05c = 7.5+.05c-.05c

.03c=7.5

divide each side by .03

.03c/.03 = 7.5/03

c =250  

the cost is the same at 250 pages