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MArishka [77]
3 years ago
12

Where does the 1 come from in this problem? The one that is under 1-r. We needed to solve for a? I'm just not sure why they put

the 1​

Mathematics
1 answer:
galina1969 [7]3 years ago
7 0
1-r 253 I’m going on a run 1 r to the store and the other slides I gotta was a great full day and
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Which of the following is the solution to the quadratic equation <br> x2−10x+21=0 ?
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Step-by-step explanation:

the answer is the image above

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Find the sum of the sequence 37+38+39+40+...130
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The sum is of37+38+39+40+...130 is 154.13
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Graph the quadratic functions y = -2x^2 and y = -2x^2 + 4 on a separate piece of paper. Using those graphs, compare and contrast
kirza4 [7]

Answer:

They are represented by downward parabola

They have the same equations of line of symmetry

Their vertices have same x-coordinates but different y-coordinates

They have the same domains

They have different ranges

They have different maximum values at same x values

The graph of y = -2x² + 4 is the image of the graph y = -2x² after translation 4 units up

Step-by-step explanation:

y = -2x² is a quadratic equation which represents by a parabola

From the red graph:

The graph of y = -2x² is represented by downward parabola

It has a maximum vertex (0 , 0)

The line of symmetry at x = 0

Its maximum value = 0 at x = 0

Its domain is {x: x ∈ R}

Its range is {y: y ≤ 0}

From the blue graph:

The graph of y = -2x² + 4 is represented by down ward parabola

It has a maximum vertex (0 , 4)

The line of symmetry at x = 0

Its maximum value = 4 at x = 0

Its domain is {x: x ∈ R}

Its range is {y: y ≤ 4}

From the two graphs

They are represented by downward parabola

They have the same equations of line of symmetry

Their vertices have same x-coordinates but different y-coordinates

They have same domains

They have different ranges

They have different maximum values at same x values

The graph of y = -2x² + 4 is the image of the graph y = -2x² after translation 4 units up

8 0
3 years ago
there are a total of 100 balloons.if the ratio of yellow balloons to blue balloons is 8 to 12,how many of them are yellow?
IrinaK [193]
The ratio of yellow balloons to blue balloons is 8:12
Then there are 100 balloons. Making the equation, we are able to have:
8X + 12X = 1000
20x = 1000
X = 50.

Yellow balloons = 8x = 8 * 50 = 400 yellow balloons
Blue balloons = 12X = 12 * 50 = 600 blue balloons

So there are  400 yellows balloons.
8 0
3 years ago
A cell phone cost $10 for the phone and $2 per hour that someone talks on the phone. If Jeremiah spent $30 total, how many hours
GREYUIT [131]

Answer:

10 times 2x = 30

Step-by-step explanation:

Tried my best

5 0
3 years ago
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