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4 years ago

Simplify each expression.20) (2x2 +82 + 7x) - (7x + 4- 612)

Mathematics

1 answer:

givi [52]4 years ago

5 0

Answer:

40x2+133x+2248

Step-by-step explanation:

20(2x2+82+7x)−(7x+4−612)

Distribute the Negative Sign:

=20(2x2+82+7x)+−1(7x+4−612)

=20(2x2+82+7x)+−1(7x)+(−1)(4)+(−1)(−612)

=20(2x2+82+7x)+−7x+−4+612

Distribute:

=(20)(2x2)+(20)(82)+(20)(7x)+−7x+−4+612

=40x2+1640+140x+−7x+−4+612

Combine Like Terms:

=40x2+1640+140x+−7x+−4+612

=(40x2)+(140x+−7x)+(1640+−4+612)

=40x2+133x+2248

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We need to find an equation for each situation. Let x be the number of GB of data used.

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4 years ago

Read 2 more answers

3 In which of these pairs of numbers would both numbers round to 6.23 ? F 6.232 and 6.236 G 6.231 and 6.233 H 6.229 and 6.239 J

tatiyna

9514 1404 393

Answer:

G 6.231 and 6.233

Step-by-step explanation:

F 6.232 and 6.236 rounds to 6.23, 6.24

G 6.231 and 6.233 rounds to 6.23, 6.23

H 6.229 and 6.239 rounds to 6.23, 6.24

J 6.222 and 6.238 rounds to 6.22, 6.24

_____

One way to determine the rounded value is to add 0.005 to the number, then drop all digits to the right of the hundredths place.

Examples:

6.222 +0.005 = 6.227 ⇒ 6.22

6.238 +0.005 = 6.243 ⇒ 6.24

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Simplify each expression.20) (2x2 +82 + 7x) - (7x + 4- 612)​

Simplify each expression.20) (2x2 +82 + 7x) - (7x + 4- 612)