Number one and number two

Mathematics

1 answer:

luda_lava [24]3 years ago

6 0

The sum of the angles of an n-sided polygon is (n-2)×180°

For a 30-gon, it would be 28x180 = 5040, answer B

Second question is more of a trick question. Exterior angles always add up to 360. So answer H.

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Draw an array for a known 10 facts then subtract 1 from each row to find the product

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Finish the sequence of 10 numbers 97,105,113

adelina 88 [10]

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121, 129, 137, 145, 153, and 161

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How does -2x + x equal -x ?

shepuryov [24]

Answer:

See below.

Step-by-step explanation:

$-2x+x=-x$

because we combine like terms. You will essentially ignore the x and just do -2 + 1, which is -1. So, the answer would be -1x which is simply just -x.

To see why we can combine like terms, use the distributive property. So we have:

$-2x+x$