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vodka [1.7K]
2 years ago
13

Find the y-intercept for the parabola defined by this equation: y=2x2+x−1

Mathematics
1 answer:
Natalija [7]2 years ago
7 0

Answer:

(0, -1)

Step-by-step explanation:

The c value of the equation represents the y-intercept. c=-1 so the y-intercept must be (0,-1)

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3 years ago
To put a narrow border around a square photo, Alicia has 32 inches of trim. The area of the photo is 60 square inches. Will she
olga nikolaevna [1]

Answer: Yes, she will have enough trim for all four sides of the square, because the perimeter of the square photo (30.98 inches) is less than  32 inches of trim she has.

Step-by-step explanation:

The formula for calculate the area of a square is:

A=s^2

Where "s" is the lenght of any side of the square.

The formula for calculate the perimeter of a square is:

P=4s

Where "s" is the lenght of any side of the square.

We know that that the area of the photo is 60 square inches, therefore, we can solve for "s" from the formula  A=s^2 and find its value:

A=s^2\\\\s=\sqrt{A}[\\\\s=\sqrt{60in^2}\\\\s=2\sqrt{15}in

Substituting the value of "s" into the formula P=4s, we get that the perimeter of the photo is:

P=4(2\sqrt{15}in)=30.98in

Therefore, since Alicia has 32 inches of trim and 30.98in, we can conclude that she will have enough trim for all four sides of the square.

8 0
3 years ago
How many different ways can an isosceles trapezoid be reflected across a line of symmetry so that it carries onto itself?
lbvjy [14]

Answer:

I'm not positive but I'm pretty sure its infinite

Step-by-step explanation:

idk

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3 years ago
What is x-2y=1, solve for y
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The answer is X=1+2y

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