Which of the equations below could be the equation of this parabola?

Mathematics

1 answer:

Ratling [72]3 years ago

8 0

Answer:

the answer is "B"

the "a" (as in ax^2) is negative thus the parabola "goes downward"

Step-by-step explanation:

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Find the value of x

kodGreya [7K]

Answer:

See below, please

Step-by-step explanation:

$(2x + 9) + (4x - 3) = 90$

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Hence

$x = 14$

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Read 2 more answers

Select the correct answer from each drop-down menu. In a circle with a radius of 7 feet, the radian measure of the central angle

trasher [3.6K]

In a circle, the number of radians is proportional to the relative length of the arc, in comparison to the radius. We have that if we denote by x the radians, the following proportionality holds, relating angles and lengths:
$\frac{x}{2\pi} = \frac{4}{2 \pi 7}$
because the total of angles in radians is 2pi and the total circumference is 2pi times the radius. Hence, by solving for x we get: x=4/7=0.57 rad

We also have that the area is proportional to the angles. The total are is $\pi r^2$ . Hence, A= $\frac{4}{2 \pi 7 } *\pi* 7^2= 14 square feet.$