Use the discriminant to determine how many x-intercepts the graph of the equation has. y=-4x2^+4x-1

1 answer:

4 0

Y=-4x²+4x-1 this quadratic equation is of the form ax² + bx + c
and its discriminante is ( Δ = b²- 4ac)
:
So Δ = b² 4ac ==> (4)² - 4(-4)(-1)==> (16) -16 = 0

When Δ = 0, the parabola intercept x=axis in one & only one point
And the x-intercept = -b/2a = (-4)/[2.(-4)] ==> x = 1/2

You might be interested in

I need someone to help me with mý math homework please help!

Julli [10]

Which question do you need help with

7 0

3 years ago

Here’s the next problem:)

horsena [70]

Answer:

disagree

Step-by-step explanation:

toa=opposit over adjacent= 12/9

tan(x)=12/9

tan^-1=12/9

x= 53.1

6 0

3 years ago

Read 2 more answers

Select the best possible first step to solving the system by first eliminating the x variable.

zheka24 [161]

It seems to be none of the above

3 0

3 years ago

Graph y = - 3x + 7 .

lbvjy [14]

Answer:

put your first point at 7 in y axis that point go down 3 to the rights side 1 and your point should be at (1,4) then connect the dots and that's how you graph it

Step-by-step explanation:

5 0

2 years ago

A market research firm knows from historical data that telephone surveys have a 36% response rate. In a random sample of 280 tel

Rasek [7]

Answer:

0.6604

Step-by-step explanation:

Given that a market research firm knows from historical data that telephone surveys have a 36% response rate.

Sample size of random sample = 280

We know for samples randomly drawn of large size sample proportion follows a normal distribution with mean= sample proportin and std error

= $\sqrt{\frac{pq}{n} }$