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Otrada [13]
3 years ago
15

Which step in this problem is incorrect ?

Mathematics
1 answer:
shepuryov [24]3 years ago
3 0
I need to write at least 20 charachers,soooooo...
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Which statement is true about the extreme value of the given quadratic equation?
ICE Princess25 [194]

Answer:

Option B.  The equation has a maximum value with a y-coordinate of -21.

Step-by-step explanation:

The correct quadratic equation is

y=-3x^{2}+12x-33

This is a vertical parabola open downward (the leading coefficient is negative)

The vertex represent a maximum

Convert to vertex form

Factor -3

y=-3(x^{2}-4x)-33

Complete the square

y=-3(x^{2}-4x+2^2)-33+12

y=-3(x^{2}-4x+4)-21

Rewrite as perfect squares

y=-3(x-2)^{2}-21

The vertex is the point (2,-21)

therefore

The equation has a maximum value with a y-coordinate of -21

3 0
3 years ago
Which expression is equivalent to 6(4(6x-4y)-5) ?
iren2701 [21]

Answer:

144x - 96y - 30

Step-by-step explanation:

<u>Step 1:  Distribute </u>

6(4(6x - 4y) - 5)

6((4 * 6x) + (4 * -4y) - 5)

6(24x - 16y - 5)

<u>Step 2:  Distribute again </u>

<u />(6 * 24x) + (6 * -16y) + (6 * -5)

144x - 96y - 30

Answer:  144x - 96y - 30

8 0
3 years ago
F(x) =12x and g(x) =x+9​
aivan3 [116]

Answer:

= 20

Step-by-step explanation:

6 0
3 years ago
Whats the answer and work for this problem (3)
mamaluj [8]
This is a system of equations. You can solve it by substitution or elimination. I'm going to use substitution x - 2y = -4.5; add 2y to each side x - 2y + 2y = -4.5 + 2y; simplify x = 2y - 4.5 2(2y - 4.5) + 3y = 12 4y - 9 + 3y = 12 7y - 9 = 12 7y - 9 + 9 = 12 + 9 7y = 21 y = 3 <--------first answer x - 2y = -4.5 x - 2(3) = -4.5 x - 6 = -4.5 x -6 + 6 = -4.5 + 6 x = 1.5 <--------second answer Check: 2(1.5) + 3(3) = 12? 3 + 9 = 12? 12 = 12; It checks 1.5 - 2(3) = -4.5? 1.5 - 6 = -4.5? -4.5 = -4.5; It checks x = 1.5 and y = 3 <-----------Final Answer
3 0
3 years ago
the graph below shows the relationship between dithering distances a delivery truck is driven and the amount of gas the truck us
LiRa [457]

Answer:

10

Step-by-step explanation:

Look at where the one gallon gas is, it's point comes to ten. :)

4 0
2 years ago
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