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koban [17]
3 years ago
5

Pleaseee helppp

Mathematics
2 answers:
dybincka [34]3 years ago
7 0

Answer:

D. Mr. X

Step-by-step explanation:

masha68 [24]3 years ago
3 0

Answer:

D.

Step-by-step explanation:

All of them could represent something or someone, but Mr. X is the closest because X is usually used as a variable.

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Please help! A-level maths.
astra-53 [7]

x+y=k\implies y=k-x

Substitute this into the parabolic equation,

k-x=6-(x-3)^2\implies x^2-7x+(k+3)=0

We're told the line x+y=k intersects C twice, which means the quadratic above has two distinct real solutions. Its discriminant must then be positive, so we know

(-7)^2-4(k+3)=49-4(k+3)>0\implies k

We can tell from the quadratic equation that C has its vertex at the point (3, 6). Also, note that

-1\le\sin t\le1\implies3\le3+2\sin t\le5\implies3\le x\le5

and

-1\le\cos2t\le1\implies2\le4+2\cos2t\le6\implies2\le y\le6

so the furthest to the right that C extends is the point (5, 2). The line x+y=k passes through this point for 2+5=k\implies k=7. For any value of k, the line x+y=k passes through C either only once, or not at all.

So 7\le k; in set notation,

\{k\mid 7\le k

4 0
3 years ago
HELP I NEED THE ANSWERS
love history [14]

Answer:

I attached a picture below of what the lines of symmetry are.

4 0
2 years ago
Please answer question now
nata0808 [166]

Answer:

469.42 ft²

Step-by-step explanation:

  • Law of sines;

         w/sin27 = 38/sin40

                   w = sin27*38/sin40

                    w = 26.84 ft

  • Angle x;

            ∡X = 180 - 27- 40 = 113º

  • Area;

              A = 0.5*(26.84)*(38)*sin(113)

            A = 469.42 ft²

8 0
2 years ago
Help me with my homework pls :)
vesna_86 [32]

Answer:

That smile tho lol

anywayssssss

b= 16 mm

Step-by-step explanation:

Pythagorean theorem is a^2 + b^2= c^2, so-

12^2 +b^2= 20^2

144+b^2=400

b^2=400-144

b^2= 256

b= 16

8 0
3 years ago
Read 2 more answers
What is the value for f(x) = 32x+1 when x = 1/2
chubhunter [2.5K]

Answer:

9

Step-by-step explanation:

We can solve this by plugging x into the function:

3^(2(1/2) + 1)

=3^(1+1)

=3^2

= 9

4 0
3 years ago
Read 2 more answers
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