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Monica [59]
3 years ago
10

Which will result in a difference of squares?

Mathematics
2 answers:
otez555 [7]3 years ago
5 0

Expanding the given expressions using Foil:

1)(–7x + 4)(–7x + 4) =7x^{2}-28x-28x+16=49x^{2}-56x+16

2) (–7x + 4)(4 – 7x)=-28x+49x^{2}+16-28x=49x^{2}-56x+16.

3)(–7x + 4)(–7x – 4)=49x^{2}+28x-28x-16=49x^{2}-16.

4)(–7x + 4)(7x – 4)=49x^{2}+28x+28x-16=49x^{2}+56x-16.

The third option that is (–7x + 4)(–7x – 4) is difference of two squares.

lukranit [14]3 years ago
4 0
The third one (-7x+4)(-7x-4)
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Taryn is shopping for a Christmas tree. At Home Depot the one she likes is $149.00 and she has a 15% off coupon. At Lowe's the o
Vitek1552 [10]

Answer:

Step-by-step explanation:

At home depot

Price of Christmas tree = $149.00

Discount = 15%

Amount discounted = 15% of $149

Amount discounted = 15/100 * $149

Amount discounted = 15 * 1.49

Amount discounted = $22.35

Amount she paid = $149-$22.35

Amount she paid = $126.65

At Lowe's:

Price of Christmas tree = $175.00

Discount = 260%

Amount discounted = 20% of $175

Amount discounted = 20/100 * $175

Amount discounted = 0.2 * 175

Amount discounted = $35

Amount she paid = $175-$35

Amount she paid at Lowe's = $140

<u><em>From the prices above, it can be seen that Home Depot has a better deal since the price after removing discount is lower than that of Lowe's.</em></u>

<u><em></em></u>

<u><em>Amount she will save will be $140 - $126.65 = $13.35</em></u>

6 0
3 years ago
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valina [46]

Answer:

even

Step-by-step explanation:

6 0
2 years ago
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Step-by-step explanation:

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7 0
3 years ago
Write the ratios for sin A and cos A
Alborosie

Hi,

Sorry this is late.

Remember: soh cah toa

sin <em>A</em>: 3/5

cos <em>A: 4/5</em>

Your answer would be A.

Have a great day!

3 0
3 years ago
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Ber [7]

Answer:

Y=-x-2 or Y=-1x-2

Step-by-step explanation:

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