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sergejj [24]
2 years ago
9

-x+6y=15 and -2x-3y=0

Mathematics
1 answer:
abruzzese [7]2 years ago
8 0

-x+6y=15

x = -15

y = 5/2

-2x-3y=0

x = 0

y - 0

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What value of c makes x2+6x+c a perfect square trimonial
DaniilM [7]

Answer:

9

Step-by-step explanation:

To solve this just take b (in this case 6x) divide it by 2 and then square it

which means that c=9

this will factor to (x+3)²

8 0
3 years ago
Who is faster? A girl who runs 200 meters in 28 seconds or her friend who runs 400 meters in 60 seconds? H.E.L.P​
blagie [28]

Answer: The girl herself ran faster than her friend.

Step-by-step explanation:

This answer, of course assumes a lot of variables, but for the sake of keeping things simple, lets assume the following, the people are ran in a "straight line" with no "obstacles" in their way, and ran on the same track.

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Calculating in meters-per-second for the girl who ran 400 meters in 60 seconds, you get 6.66666666667  meters per second

Comparing the two results, it can be "accurately" concluded that the girl herself ran faster than her friend under the following assumptions earlier stated.

4 0
3 years ago
The table shows the depth of a submarine over a 2 hour period. Did the sub go up or down?By how much?
hichkok12 [17]
If the sub is closer to the surface later, we thus know that it traveled upwards.

4 0
3 years ago
Read 2 more answers
Find the value of x in the isoscleles triangle sqrt45 and altitude 3​
Alisiya [41]

Answer:

c.\hspace{3}x=12

Step-by-step explanation:

Isosceles triangles are a type of triangles in which two of their sides have an identical length. It should be noted that the angles opposite the sides that are the same length are also the same. This means that these triangles not only have two equal sides, but also two equal angles.

You can solve this problem using different methods, I will use pythagorean theorem. First take a look at the picture I attached.  As you can see:

x=2a

And we can find a easily using pythagorean theorem:

(\sqrt{45} )^{2} =3^{2} +a^{2}

Solving for a:

a^{2} =(\sqrt{45} )^{2} -3^{2} \\\\a^{2} =45-9\\\\

a^{2} =36\\\\a=\sqrt{36} \\\\a=6

Therefore:

x=2a\\\\x=2(6)\\\\x=12

8 0
3 years ago
HELP me thank you c:
Phoenix [80]

Answer:

d. always, an equal distance, all

e. never, would not, all

Step-by-step explanation:

Hope this helps -w-

8 0
2 years ago
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