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Drupady [299]
3 years ago
13

What is the product? (2x-1)(x+4)

Mathematics
1 answer:
MissTica3 years ago
4 0

Answer:

2x² + 7x - 4

Step-by-step explanation:

(2x-1)(x+4)

= (2x)(x) + (2x)(4) + (-1)(x) + (-1)(4)

=2x² + 8x - x -4

=2x² + 7x - 4

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Omar rides his unicycle on the playground.
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Answer:

439.6 inches

Step-by-step explanation:

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Number of revolutions = 7

Diameter, d = 20 inches

π * number of revolutions * diameter

3.14 * 7 * 20

= 439.6 inches

6 0
3 years ago
The equation y=x^2-12x+45 models the number of books y sold in a bookstore x days after an award-winning author appeared at an a
romanna [79]
Answer: The first day the author reaches 100 days is on day 16.

To solve this problem, you could use a graphing calculator to graph the given equation. Then, determine when this line crosses 100. It crosses when x = 15.539. Therefore, we would have to round up to 16 so it is at least 100.

You could use the quadratic equation to solve: 100 = x^2 -12x + 45

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7 0
3 years ago
Find the number of real number solutions for the equation. x2 + 5x + 7 = 0 0 cannot be determined 1 2
alisha [4.7K]

\Delta=5^2-4\cdot1\cdot7=25-28=-3

\Delta so 0 solutions.

5 0
3 years ago
Read 2 more answers
Boof<br>$543.51 is subtotal.
antiseptic1488 [7]

Answer:

The total of the sales price and sales tax is  $ 588.35 .

Step-by-step explanation:

As given

$543.51 be the subtotal .

8.25% is the sales tax .

8.25% is written in the decimal form.

= \frac{8.25}{100}

= 0.0825

Sales tax price = 0.0825 × 543.51

                         = $ 44.84  (Approx)

Total of sales price with sales tax = Sale price + Sales tax price

Putting the values in the above

                                                       = $543.51 + $44.84

                                                       = $ 588.35

Therefore the total of the sales price and sales tax is  $ 588.35 .

6 0
3 years ago
Find the missing number so that the equation has no solutions.<br> x - 18 = -3x - 8
Wewaii [24]

Answer: x = 5/2

Step-by-step explanation:

4 0
3 years ago
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