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3 years ago

Which of the following graphs is a polynomial function with x-intercepts (-2,0) (1,0) (4,0)

Mathematics

2 answers:

Julli [10]3 years ago

7 0

Answer:

the line passes through positive 4 x intercept

Step-by-step explanation

Vitek1552 [10]3 years ago

5 0

(4,0) because it remains in the x axis

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3. A person standing 3 feet away from the base of a lamp post casts a shadow 4 feet long. If the person is 6 feet tall and walks

german

Answer:

533.33 ft/min

Step-by-step explanation:

We are given that

x=3 feet

y=4 feet

Height of person,h=6 feet

$\frac{dx}{dt}=400 ft/min$

Triangle ABC and A'B'C are similar because all right triangles are similar

By using similarity property

$\frac{h'}{6}=\frac{7}{4}$

$h'=10.5 feet$

$x+y=3+4=7 feet$

$\frac{h'}{6}=\frac{x+y}{y}$

$\frac{10.5}{6}=\frac{x+y}{y}$

$10.5y=6x+6y$

$10.5y-6y=6x$

$4.5y=6x$

Differentiate w.r.t t

$4.5\frac{dy}{dt}=6\frac{dx}{dt}$

$\frac{dy}{dt}=\frac{6\times 400}{4.5}ft/min$

$\frac{dy}{dt}=533.33ft/min$

Hence, If the person is 6 feet tall and walks away from the lamp post at a speed of 400 feet per minute then his shadow moving at the rate 533.33 ft/min

7 0

3 years ago

Bowser bought mushrooms

Arturiano [62]

I’m pretty sure it’s $3.60. since the price for one pound it 72 cents

8 0

4 years ago

solve 5x^2-7x+2=0 completing the square. what is the constant added on to form the perfect square trinomial

kenny6666 [7]

Best to factor 5 out of the first 2 terms:

5x^2-7x+2=0 =>  <span>5(x^2 - [7/5]x) +2=0

Take half of [-7/5]: That'd be -7/10.

Square 7/10, add it to  </span>5(x^2 - [7/5]x)   +2=0 and then subtract it:

5(x^2 - [7/5]x)+ 49/100 - 49/100 )   +2=0

Then we have 5(x- [7/10] )^2 - 49/100 ) + 200/100 = 0

5(x-7/5)^2 - 245/100 + 200/100 = 0
5(x-7/5)^2 - 45/100 = 0
Dividing all terms by 5, x-7/5 = plus or minus sqrt( 9/100 )
x-7/5 = plus or minus 3/10

Then one root is x = 7/5 + 3/10, or x= 17/10 (answer #1)

The other is x = 7/5 - 3/10, or x = 14/10 - 3/10, or x = 7/10 (answer #2)

3 0

3 years ago

What do you think is the best anime show?

Ulleksa [173]

Answer:

My hero academia

Step-by-step explanation:

Black butler,attack on titan

3 0

3 years ago

Read 2 more answers

The answer to the question