(3x+7)(3x-7) if necessary combine like terms

Mathematics

1 answer:

34kurt3 years ago

3 0

Answer:

9x^2 -49

Step-by-step explanation:

We recognize that this is of the form

(a+b)(a-b) = a^2 - b^2

3x = a and 7 =b

(3x)^2 - 7^2

9x^2 -49

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Madison has set up a lemonade stand outside her house and sells small cups and large cups of lemonade. Each small cup holds 12 o

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Answer:

$12x+22(y+10)=1240, y=x$

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Step-by-step explanation:

let x be the number of small cups and y the number of large cups.

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#Before the 10 more were sold, the number of x and y sold were equal>

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3 years ago

Read 2 more answers

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natima [27]

Answer:

d) one solution; (4, 1)

Step-by-step explanation:

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The first line has slope -1 and y-intercept +5; the second line has slope 1 and y-intercept -3. The slope is the number of units of "rise" for each unit of "run", so it can be convenient to graph these by starting at the y-intercept and plotting points with those rise and run from the point you know.