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Kruka [31]
3 years ago
8

Please help asap 50 pts

Mathematics
2 answers:
andrey2020 [161]3 years ago
8 0

id go with b honestly

drek231 [11]3 years ago
4 0
k^2+5kf-50f^2=k^2+10kf-5kf-50f^2\\\\=k(k+10f)-5f(k+10f)=(k+10f)(k-5f)\\\\\boxed{Answer:\ A.\ (k+10f)(k-5f)}
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True or false
valina [46]
False because a number is rational if we can write it as a fraction where the top number of and bottom number are both whole numbers but irrational numbers is any number that is not rational. It is a number that cannot be written as a ratio of two integers(or cannot be expressed as a fraction)
3 0
3 years ago
The position function for a free-falling object is s(t) = -16t^2 + vt +5. A ball is thrown upward from the top of a 400-foot bui
mixer [17]

Answer:

6.21 seconds

Step-by-step explanation:

The position function of a free-falling object is,

s(t) = -16t^2+v_0t+s_0

Where,

s_0 = initial height of the object,

v_0 = initial velocity of the object,

Here,

s_0=400\text{ feet}

v_0=35\text{ feet per sec}

Hence, the height of the ball after t seconds,

s(t)=-16t^2+35t+400

When s(t) = 0,

\implies -16t^2+35t+400=0

t=\frac{-35\pm \sqrt{35^2-4\times -16\times 400}}{2\times -16}

t=\frac{-35\pm \sqrt{1225+25600}}{-32}

\implies t\approx -4.02\text{ or }t\approx 6.21

∵ Time cannot be negative,

Hence, after 6.21 seconds the ball will reach the ground.

4 0
3 years ago
Find g (x) - f (x). <br><br> g (x) = x^2 + 1 and f (x) = 2x + 5
allochka39001 [22]

Answer:

x^2 - 2x - 4

Step-by-step explanation:

g(x) - f(x) = (x^2 + 1) - (2x + 5) = x^2 + 1 - 2x -5 = x^2 -2x +(1-5) = x^2 - 2x - 4

6 0
3 years ago
When you convert 100 ft per second to inches per second, will there be more or less than 100 inches.Explain
Serga [27]

There are 12 inches in a feet, so there are 1200 inches. 1200 inches is more than 100 inches, so there is more.


6 0
4 years ago
If a TV has 200 ft by 875 ft what is the total mass of it
mafiozo [28]
There's no way to find the mass with the information given.
"200 ft" and "875 ft" are linear dimensions ... things you would
measure with a ruler.  They tell us how long or wide or high the
TV is.  None of that information tells us anything about its mass.

By the way ... those are gigantic measurements.  I was working
in Wrigley Field here in Chicago just before opening day in 2015,
when the new video screens were being installed.  I saw them
up close while the cranes lifted them into position.  None of the
Chicago Cubs' new screens is as big as the numbers in the question,
and I'm pretty sure the whole score-board isn't that big either.
Something is definitely wrong here.
8 0
4 years ago
Read 2 more answers
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