18m+4+8m= -2(-13 - 2) is that no solution, one solution, or infinite solutions

one solution

Step-by-step explanation:

Step 1: Simplify both sides

Step 2: Subtract 4 from both sides.

Step 3: Divide both sides by 26.

Therefore, the answer is one solution.

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b. x + 1

step-by-step explanation:

i'am smart

answer: cos [   arcsin (3/5) - arccos (1/2) ] =

step-by-step explanation: × = 3/5 = 0.6--> x = 36.87 and x = 180 - 36.87 = 143.13 deg

cos y = 1/2 --> y = +- 60 deg a. cos (x - y) = cos (143.13 - 60) = cos 83,13  

=

0.12

b. cos (36.87 - 60) = cos (-23.23) = 0.92