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dexar [7]
2 years ago
8

Simplify: (2x + 8)(7x2 - 9x - 5)

Mathematics
2 answers:
kondaur [170]2 years ago
8 0

Answer:

-18x^2 -54x + 72

Step-by-step explanation:

Ilya [14]2 years ago
5 0
(2x+8)(7x2-9x-5) simplifies to -18x2−54x+72
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Which of the following is the graph of the quadratic function y - x? +10x+16 ?
Assoli18 [71]

Find the vertex:

\textrm{Use the formula } \frac{-b}{2a} \textrm{ to find the vertex}\\ \\ \frac{-10}{2} = -5\\ \\ \textrm{In order to find the y value plug in -5 back into the function}\\ \\ y=(-5)^2+10(-5)+16\\ y=-9\\\\ \textrm{The vertex of the function is} (-5,-9)

Determine if the parabola will open up or down:

a > 0 \\ \\ 1>0

Since the value of a is positive, the parabola will open upwards

Find the x and y intercepts:

Factor y = x^2+10x + 16 to find the x intercepts

(x+8)(x+2)

x + 8 = 0

x = -8

x + 2 = 0

x = -2

x intercepts:

x = -2

x = -8

Find the y intercept

y = 0^2+10(0) + 16\\\\ y=16

Hence, C. Graph A best represents the quadratic function y = x^2+10x + 16

6 0
3 years ago
The length of a rectangle is two more than twice the width. the perimeter is 58ft. what is the area of the rectangle?
goldenfox [79]

58/2 = 29

w +2w+2 = 29

3w+2 =29

3w = 27

w = 27/3 = 9

 width = 9

length = 2*9=18+2 = 20

20+20+9+9 = 58

Length = 20 feet

width = 9 feet


5 0
3 years ago
−15 ÷ 5 = A number line going from negative 30 to positive 30. An arrow goes from 5 to 10, from 10 to 15, from 15 to 20.
miv72 [106K]

Answer:

-3

Step-by-step explanation:

-15 divided by 5= -3

4 0
3 years ago
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The price of orange juice is believed to increase by 14% over the next year. If a gallon of orange juice costs $3.00 now, what w
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Answer:

3.42

Step-by-step explanation:

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3 years ago
Which complex number is represented by the graph
Dmitrij [34]

Answer:

3-4i

Step-by-step explanation:

The x-axis represents x and x is 3. The y-axis represents iy and y is -4 so iy is -4i.

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3 years ago
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