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kondaur [170]
3 years ago
6

Select the graph of the equation below. y= -1/4x^2+1

Mathematics
1 answer:
V125BC [204]3 years ago
4 0

Answer:

a.

Step-by-step explanation:

Since you have the different parabolas there, the simplest way to determine which one is, is replacing x as 0 and then y as 0

y = -1/4x^2 + 1

When x = 0

y = -1/4 (0)^2 +1 = 1

When y = 0

0 = -1/4x^2 +1

1/4 x^2 = 1

x^2 = 4

x = + 2

x = - 2

The parabola with points:

(0,1); (-2,0) and (2,0) is a.

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If using the method of completing the square to solve the quadratic equation
zheka24 [161]

Answer: 25

Step-by-step explanation: The number that is added to both sides is the number that is needed to create a perfect square trinomial.

The question is, what is that number?

Well, it comes from a formula. The number that is added to both sides always comes from half the coefficient of the middle term squared.

So half of -10 squared or -5 squared which is 25.

So 25 is added to both sides.

8 0
3 years ago
Write 4 1/7 as an improper fraction?
guapka [62]

Answer:

29/7

Step-by-step explanation:

4 1/7 = 4 + 1/7

4 = 28/7

then:

4 1/7 = 28/7 + 1/7 = (28+1) / 7

= 29/7

8 0
2 years ago
A music store charges $18.50 for a CD plus a 0.5% city tax and a separate 4% state tax.
Strike441 [17]
A) The equation will become: 18.50 (1.005) + 18.50 (0.04)= 19.3325
Which can be rounded to 19.33
b) 18.50 (1.04)-18.50(1.005)= 0.6475
Which can be rounded to 0.65

Therefore your answer is Number 1)
3 0
3 years ago
What is 15% of 80kg i am<br> Really not sure
Dafna11 [192]

Answer:

12 kg

Step-by-step explanation:

15×80/100

15×8/10

120/10

12 kg

7 0
2 years ago
Read 2 more answers
I need help fast !!
AysviL [449]
<h2>Answer:</h2>

Luke does a work of 308Nm

<h2>Step-by-step explanation:</h2>

If we have a constant force \vec{F} that acts on a body in the same direction as the displacement \vec{s}, then the work W is defined as the product of the force magnitude F and the displacement magnitude s. In other words:

W=Fs, which is valid for a constant force in direction of straight-line displacement.

In this problem:

F=22N \\ \\ s=14m

Therefore:

W=22\times 14 \\ \\ \boxed{W=308Nm}

3 0
3 years ago
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