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3 years ago

15

A classmate simplifies the expression in exercise 1. is the expression he wrote equivalent to the original expression? explain.

1 answer:

AlladinOne [14]3 years ago

4 0

Excercise 1:

No, this is not simplified fully. The full answer would be <span>−7dk+14d−21k</span>−7, not <span>14d - 9 - 21k - 7dk + 2. So, it is not equivalent.
</span><span>
Excercise 4:
</span><span>7dk (2 - 3 - 1) - 7
</span>
Just multiply 7dk into (2) (-3) and (-1)
you'd get:
<span><span>−<span>14dk</span></span>+</span>−<span>7 after simplifying it fully.
</span>
p = parameter
w = width

w+2.75

p = 2w+2(w+2.75) = <span>4w</span>+<span>5.5 = 30

Answer to the last one:

w = 6.125</span>

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