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3 years ago

Helpooo pleaseeee and thank youu

Mathematics

2 answers:

Sphinxa [80]3 years ago

5 0

K is the midpoint of ab

bazaltina [42]3 years ago

5 0

K is the midpt. of AB.

Its in the middle of AB so its the midpt.

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A skydiver drops her watch as she jumps out of a plane flying at an altitude of 6,400 feet. If the equation for height as a func

fomenos

Answer:

To hit the ground, it will take the watch:

20 seconds.

Step-by-step explanation:

Making use of the provided equation:

h (t) = - 16t ^ 2 + initial height

Which can be modified specifically for this case:

h (t) = - 16t ^ 2 + 6400 feet.

Time must be replaced a certain number of times until the value is zero, this can be done one by one, but since it would be too many iterations I will show you some examples and what you could deduce in each case.

With t = 1 second:

h (1) = - 16 (1) ^ 2 + 6400 feet = 6384 feet (only the watch has dropped 16 feet)

With t = 7 seconds:

h (7) = - 16 (7) ^ 2 + 6400 feet = 5616 feet (has fallen 784 feet)

With h = 15 seconds:

h (15) = - 16 (15) ^ 2 + 6400 ft = 2800 feet (3600 ft has fallen, it is not long)

With h = 21 seconds:

h (21) = - 16 (21) ^ 2 + 6400 feet = -656 feet (When obtaining a negative number, it is understood that the time was too long, therefore a shorter time must be taken)

With h = 20 seconds:

h (20) = - 16 (20) ^ 2 + 6400 feet = 0 feet

Since with 20 seconds the exact value of zero is obtained, this time is the exact time it would take the watch to fall to the ground, since when this time is reached the height (h) will be zero, that is, at ground level .

5 0

3 years ago

PLEASE HELP PLEASE HELP

Nataly_w [17]

Answer:

Step-by-step explanation:

Sum the three angle of triangle = 180

x + 53 + 60 = 180

x + 113 = 180

x = 180 - 113

x = 67

5 0

3 years ago

Read 2 more answers

A square patio has an area of 197 square feet how long is each side of the patio to the nearest 0.05

nata0808 [166]

If it is a square, all the sides are the same, i would think all the sides are 197 square feet.

8 0

3 years ago

Hannah types at a rate of 50 words per minute at this rate how many minutes will it take her to type a 200 word paper

12345 [234]

Answer:

Step-by-step explanation:

To solve this you must divide the amount of words in the paper by the rate at which Hannah types, which comes out to be 200 divided by 50, which is equal to 4.

4 0

4 years ago

Read 2 more answers

Which of the following would best be solved using factoring the difference of squares? 2² + 3x - 10 = 0 O 3r² + 12x = 8 2³ +52²

IgorC [24]

Given: Different equations

To Determine: Which would be best solved using difference of two squares

Solution

The factorization of a difference of two squares is given below

$a^2-b^2=(a-b)(a+b)$

Let us examine each of the given equation

$\begin{gathered} x^2+3x-10=0 \\ x^2-2x+5x-10=0 \\ x(x-2)+5(x-2)=0 \\ (x-2)(x+5)=0 \end{gathered}$ $\begin{gathered} 3x^2+12x=8 \\ 3x^2+12x-8=0 \end{gathered}$ $\begin{gathered} x^3+5x^2-9x-45=0 \\ x^2(x+5)-9(x+5)=0 \\ (x+5)(x^2-9)=0 \\ x^2-9=x^2-3^2=(x+3)(x-3) \\ Therefore \\ (x+5)(x+3)(x-3)=0 \end{gathered}$ $\begin{gathered} x^2-25=0 \\ x^2-5^2=0 \\ (x+5)(x-5)=0 \end{gathered}$

From the above,

$\begin{gathered} x^3+5x^2-9x-45=0 \\ AND \\ x^2-25=0 \end{gathered}$

The two equation above can be solved by difference of two square, but the equation below is the easiest solved using differnce of two square

x² - 25 = 0

3 0

1 year ago