All categories

3 years ago

Which point is an x-intercept Og the quadratic function f(x) = (x-4)(x+2)?

Mathematics

2 answers:

user100 [1]3 years ago

8 0

(-6,0) would be correct

worty [1.4K]3 years ago

3 0

Hi there!

To find the x-intercept of the function we need to calculate f(x) = 0.

$(x - 4)(x + 2) = 0$

Rule AB = 0, gives A = 0 or B = 0.
$x - 4 = 0 \: \: \: or \: \: \: x + 2 = 0$

Add 4 to both sides or subtract 2 from both sides.
$x = 4 \: \: \: \: \: \: \: \: \: \: or \: \: \: x = - 2$

Hence, the solutions are:
(4, 0) & (-2, 0)

You might be interested in

!!!!!!!!!!!!!!!!!!!!!!

bezimeni [28]

Answer:

x = 55

Step-by-step explanation:

To find the value of x

3x - 35 = 130 (vertically opposite angles are equal)

3x = 130 +35

3x = 165

x = 165/3

x = 55

8 0

3 years ago

Read 2 more answers

A store prices tapes by raising the wholesale price 50% and adding 25 cents .What must a tape's wholesale price be if the tape s

Andre45 [30]

Let's call the store value as s and the wholesale price as w. A store prices tapes by raising the wholesale price 50%(0.5 in decimals) and adding 25 cents, writing this as an equation, we have

$s(w)=w+0.5w+0.25$

If we invert the equation we're going to find the the wholesale price as a function of the store price.

$\begin{gathered} s=w+0.5w+0.25 \\ s=1.5w+0.25 \\ s-0.25=1.5w \\ w(s)=\frac{s-0.25}{1.5} \end{gathered}$

Now, to find the wholesale price if the sales price is $1.99, we just need to evaluate s = 1.99 on the function we created.

$w(1.99)=\frac{1.99-0.25}{1.5}=1.16$

The wholesale price is $1.16.

5 0

1 year ago

A 9 B 18 C 4.5 D 19 Thanks

irina1246 [14]

Answer:

The answer is C. 4.5. Hope that helps.

Step-by-step explanation:

7 0

3 years ago

In a coffee shop "Scratch and Win" contest, one out of three cards is a winner. What is the probability that Shenice would first

jolli1 [7]

Answer: C.) 4/27

Step-by-step explanation:

Given that:

One out of three cards is a winner :

P(winning) = 1 / 3

Therefore, P(not winning) = P(losing) :

1 - P(winning) = 1 - 1/3 = 2/3

Probability that shenice will first win on her third try can be interpreted as:

1st try = lose, 2nd try: lose, 3rd try : win

P(losing) × p(losing) × p(winning)

(2/3) × (2/3) × (1/3)

4 / 27

Probability of first winning on third try = 4/27

7 0

3 years ago

Please help me please!

Mumz [18]

Step-by-step explanation:

a,b) you can place all 17 in the middle and both circle will have 17 each. then remove 2 and place one each on separate sides. you can do this 8 times so that at the you'll end up with 1 in the middle and 8 each on separate sides.

the ways to do is then 9.

7 0

2 years ago