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liubo4ka [24]
3 years ago
7

I need help on this asap, I'm giving 39 POINTS and mark BRAINLIEST the question is on the pic! thankss

Mathematics
1 answer:
shtirl [24]3 years ago
3 0
Answer: I’m pretty sure it’s c also
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The range of the function f(k) = k2 + 2k + 1 is {25, 64}. What is the function’s domain? {5, 8} {-5, -8} {3, 8} {4, 7} {4, 8}
Savatey [412]
The range is the ouutput from inputing the input
basically
25=k²+2k+1 and 64=k²+2k+1
the values that satisfy both equations (not at the same tim) are the valuess that are the domain
solve each
25=k²+2k+1
minus 25 both sides (or recognize the perfect square trinomial, but anyway)
0=k²+2k-24
factor
0=(k+6)(k-4)
set to zero
k+6=0
k=-6
k-4=0
k=4
k=-6 or 4

64=k²+2k+1
minus 64 both sides
0=k²+2k-63
facor
0=(k-7)(k+9)
set to zer
k-7=0
k=7
k+9=0
k=-9
k=-9 or 7



so the domain has the numbers
-9,-6,4,7
it seems we only want the positive square roots so
answer is {4,7} is the domain
3 0
3 years ago
The cone had a radius of 4.5 inches and a height of 6 inches. What is the volume of this cone?
pochemuha

Answer:

125.8983

Step-by-step explanation:

Use the formula for volume of a cone: v= (1/3)(3.14)(radius squared)(height) so v = (1/3)(3.14)(20.25)(6) = 125.8983

4 0
2 years ago
Cecil the acrobat walked three and one half feet on his tightrope, backed up 1 foot, then walked six and one half feet to get ba
Effectus [21]
3 1/2 - 1 + 6 1/2= 9 feet is how far he walked 
3 0
3 years ago
A total of 408 tickets were sold for the school play. They were either adult tickets or student tickets. The number of student t
Marizza181 [45]
Let 2x=student tickets
Let x=adult tickets
2x+x=408
3x=408
x=136
2x=272

Number of student tickets sold:272
Number of adult tickets sold:136
5 0
3 years ago
Write 763089 in words​
Svet_ta [14]
Seven hundred and sixty-three thousand, and eighty- nine.
4 0
2 years ago
Read 2 more answers
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