(-) + (-) = (-)
(-) × (-) = (+)
(-) + (+) = the sign of greatest [(-) if the greatest is (-) or (+) if the greatest is (+)]
(-) × (+) = (-)
(-) - (+) = (-)
(+) - (-) = (+)

∵ The expression is -8 - 2(3 + 2n) + 7n

- Simplify it

∵ 2(3 + 2n) = 2(3) + 2(2n) = 6 + 4n

∴ -8 - 2(3 + 2n) + 7n = -8 - (6 + 4n) + 7n

- Multiply the bracket by (-)

∴ -8 - (6 + 4n) + 7n = -8 - 6 - 4n + 7n

- Add the like terms

∴ -8 - (6 + 4n) + 7n = (-8 - 6) - 4n + 7n

∴ -8 - (6 + 4n) + 7n = -14 + 3n

∴ -8 - 2(3 + 2n) + 7n is equivalent to -14 + 3n

∵ -14 + 3n ≠ -30 - 13n

∴ -8 - 2(3 + 2n) + 7n is not equivalent to -30 - 13n

No, -8 - 2(3 + 2n) + 7n is not equivalent to -30 - 13n

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8 0

3 years ago

Fed [463]

Answer:

$1.51

Step-by-step explanation:

1.25 lb. of dried fruit : $\frac{\$1.84}{lb.}*\frac{1.25\ lb.}{1}=\$2.30$

0.5 lb. of cereal : $\frac{\$2.38}{lb.}*\frac{0.5\ lb.}{1}= \$1.19$

Cost = $2.30 + $1.19 = 3.49

Money = $5

$5 - $3.49 = $1.51 in change

5 0

3 years ago