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nadya68 [22]
3 years ago
10

i have a simple question if i have (f + g)(x) = 2x + 7 + 6x – 5 and i combine 2x and 6x is it 8x or 8x^2?

Mathematics
2 answers:
dybincka [34]3 years ago
5 0
It is 8x because you're adding them not multiplying them. If you were multiplying it would be8x^2

Alexeev081 [22]3 years ago
4 0
<span>(f + g)(x) = 2x + 7 + 6x – 5 

// 2x + 6x = 8x
// 7 - 5 = 2

Therefore,
</span>(f + g)(x) = 8x + 2
<span>
Answer: 8x + 2

</span>
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Work out the value<br> of <br> 2. 4510 ×10to the power of 9<br> 1.15 × 10 to the power of 3
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Evaluate the expression for x = 5, y = 3, and z = 14 . 5x−6y+20z over 4yz Enter your answer in the box.
spin [16.1K]

Hello from  MrBillDoesMath!


Answer:   1 17/24


Steps:

          Evaluate             (5x-6y+20x)/ 4yz when x = 5, y = 3, z = 14


          (5(5) - 6(3) + 20(14))   / 4 (3)(14)          (Substitute in values)

       = (25   - 18    +280)       / 4 (3) (14)         (Evaluate products)

       =  (287) /  4 (3) (14)                                (Evaluate expressions)

      =  287/ 168                                             (4 (3)(14) = 168)

      =  (168  + 119 ) /168                                 287 = 168  + 119

      = (168)/168 + 119/168

      = 1              + 119/168

      = 1  119/168          

       BUT 119 = 17 * 7  (surprise!)  and 168 = 12 * 7 * 2 so answer

    =  1 (17*7)/(12*7*2)

    =  1 (17)/(12*2)                               (Cancel 7's)

    = 1 (17/24)                                    


Regards, MrB    


3 0
3 years ago
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