Mathematics: David bought 4.75 pounds of chicken for $11.40. how much did he pay per pound? a. $0.42 per pound b. $2.40 per pound c. $6.65 per pound d. $54.15 per pound

Step-by-step explanation:Substraction...

David bought 4.75 pounds of chicken for $11.40. - id4751140358584, kirbymichellrow6zq9

Ответ:

AM28

20.08.2021

Mathematics

$\huge\boxed{-32a^2b+7a^2+3b^2-35ab-a+40b+3}$

Step-by-step explanation:

$7b(2a^2+5a-7)\qquad|\text{use the distributive property}\\\\=(7b)(2a^2)+(7b)(5a)+(7b)(-7)=14a^2b+35ab-49b\\\\\\(7a^2-a+3)-3b(6a^2-b+3)\qquad|\text{use the distributive property}\\\\=7a^2-a+3+(-3b)(6a^2)+(-3b)(-b)+(-3b)(3)\\\\=7a^2-a+3-18a^2b+3b^2-9b$

Substraction

$(7a^2-a+3-18a^2b+3b^2-9b)-(14a^2b+35ab-49b)\\\\=7a^2-a+3-18a^2b+3b^2-9b-14a^2b-35ab+49b\\\\\text{combine like terms}\\\\=(-18a^2b-14a^2b)+7a^2+3b^2-35ab-a+(-9b+49b)+3\\\\=-32a^2b+7a^2+3b^2-35ab-a+40b+3$

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David bought 4.75 pounds of chicken for $11.40. how much did he pay per pound? a. $0.42 per pound b. $2.40 per pound c. $6.65 per pound d. $54.15 per pound

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