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Paul [167]
3 years ago
12

Can someone please help me with this expanding brackets problem ? Quick ! I will give 20 points :)

Mathematics
1 answer:
eimsori [14]3 years ago
7 0

Step-by-step explanation:

(x + 1)(x - 6)(x + 7)

{x}^{2}  - 6x + x - 6(x + 7)

{x}^{3}  + 7x - 6 {x}^{2}  - 42x +  {x}^{2}  + 7x  - 42

{x}^{3}  - 5x {}^{2}  - 35x - 42

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3 years ago
The Leukemia and Lymphoma Society sponsors a 5k race to raise money. It receives $55 per race entry and $10,000 in donations, bu
photoshop1234 [79]
The net amount they raise is the amount they receive minus what they pay in expenses.

They receive:
$10,000 fixed amount in donations
$55 per person

They pay:
$15 per person

If there are x number of entries, they receive 55x from the entries.
Also, they pay 15x for the entries.

The net amount they raise is amount they receive min us amount they pay:

55x + 10,000 - 15x

which simplifies to

40x + 10,0000

They want to raise at least $55,000.
At least $55,000 means $55,000 or more.
They want to raise an amount greater than or equal to $55,000.

Now we write the inequality:

40x + 10,000 >= 55,000

Now we solve the inequality for x, the number of entries.

40x >= 45,000

x >= 1125

They must have 1125 or more race entries to raise $55,000.
6 0
4 years ago
2 questions…
laila [671]

Answer:

1) (-50) <(-25) < (-10) < 10 < 25

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Step-by-step explanation:

For the first question we list the numbers according to their sign(start from negative)

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Answer:

(23 times 1/3) -5  = 2 2/3

Step-by-step explanation:

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