10 points with a and b they seem easy but i cant do

A. 2.667

B -0.9821

Step-by-step explanation:

A.

First, we need to distribute the across the parenthesis.

(-8) + (12)

+

2

2.667 --- convert to decimal with 3 places

B.

First, we need to convert the 2 mixed fractions into improper fractions. We can use this formula:

a =

4 =

5 =

Now, we need to make them have the same denominator so we can subtract them. We can do this by multiplying one fraction by the denominator of the other over itself, like this:

+

×

×

For our case:

× =

× =

Now we can subtract them.

-

-

-0.9821 --- convert to decimal

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation:

1.3

step-by-step explanation:

3x2=6   9x+6

bring down the 6 on both sides

6+6=12

12= 9x

divide by 9

12/9 =

1.3 =x