Someone !
add and simplify to find the answer for #15 and #12.
provide answers are both not sure if number 12 is correct and explain why! ?

see explanation

Step-by-step explanation:

12

Since the denominators are like, add the numerators leaving the denominator

=

=

15

We require the denominators to be like before we can add.

factor x² - 4 as a difference of squares

x² - 4 = (x + 2)(x - 2)

Expressing as

+

multiply the numerator/denominator of the first fraction by (x - 2)

= +

Expand and simplify the numerators, leaving the denominator

=

=

8

step-by-step explanation:

to find the amount of gift bags to use all the supplies, find the gcf or greatest common factor. this is the largest number which multiplies evenly into each term.

48 has factors: 1, 2, 3, 4, 6, 8, 12. 16, 24, 48

80 has factors: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80

64 has factors: 1, 2, 4, 8, 8, 16, 32, 64

the highest number factor they all share in common is 8. this means there will be 8 bags with 6 pencils, 10 markers, and 8 stickers in each bag.

i think the correct option is the second option.