Part a:
180 x 30
part b:
underestimate. the rounded value is less than the original number
I'd love to help but I'm sorry, I can't see the picture. Did you forget it?
First one would be 104
second one would be 36
Step-by-step explanation:
While subtracting , the sign of each and every term of second expression changes.
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Combine like terms. Like terms are those which have the same base. Only coefficients of like terms can be added or subtracted.
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Hope I helped ! ツ
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Distribute
4x+3x-6=-20
7x-6=-20
add 6 to both sides
7x=-14
divide both sides by 7
x=-2