3/10s - 1.3 + 1.7s =
I need to find an equal expression for this. Please guide me through! I need the explanation!!!

20x-13/10

Step-by-step explanation:

change made to your input should not affect the solution

1) 1.7 replaced by (17/10).

2) simplify 17/10

then it equals to 3/10x - 13/10 + 17/10x

3) simplify 13/10

4) simplify 3/10

5) combine the numerator together put the sum or difference over the common denominator then reduce to lowest terms if possible

3x-13/10

6) add it back to 17x/10

3x-13/10 + 17x/10

you will get my answer mentioned above

hope this is helpful to you

[2, 2.5)

(2.5, 3]

step-by-step explanation:

i think its these two not sure [2, 2.5)

(2.5, 3]

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