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  1. 1.71

    Step-by-step explanation:

    Cosine = adjacent/hypotenuse

    cos 70 = x/5

    cos 70 = 0.3420201433

    0.3420201433(5) = 1.710100716

    x=1.710100716

    x=1.71

  2. x = 4.56

    Step-by-step explanation:

    Angle A = 20 degrees

    x = BC

    sin(20) = x/5

    multiply 5 on both sides

    5sin(20) = x

    x = 4.56

  3. 9 sandwiches per hour

    step-by-step explanation:

    when we have a rate, we want a 1 in the denominator

    27/3 = 9

    27 sandwiches/ 3 hours = 9 sandwiches/hour

  4. question 1 is 8, question 2 is 9, question 3 is 24

    step-by-step explanation:

    now, the numbers they give you at the top are the key. from there, you just have to plug and chug! let's try 1, 2, and 3!

    key: a=3, b=5, c=6

    1. a+5

    remember, a=3, so we plug that in to get 3+5=8

    2. 15-c

    c=6, so we plug that in to get 15-6=9

    3. 4b

    b=6, so we plug it in to get 4*6=24

    time to try the rest on your own! if you put the answers below in a comment, i'll check them for you!

    [tex]Can somebody solve some basic algebra[/tex]

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