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VashaNatasha [74]
3 years ago
14

What is the perimeter of this triangle ⬆️​

Mathematics
1 answer:
kati45 [8]3 years ago
8 0

Answer:

36 km

Step-by-step explanation:

We can use the Pythagorean theorem to find a

a^2 +b^2 =c^2

a^2 +12^2 = 15^2

a^2 +144=225

Subtract 144 from each side

a^2 =225-144

a^2 =81

Taking the square root of each side

a = sqrt(81) = 9

Then we need to find the perimeter

a+12+15

9+12+15

36

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What is the value of y ? <br> y=-2x+4?
sineoko [7]

Answer:

y = 4 + -2x

Step-by-step explanation:

Simplifying

y = -2x + 4

Reorder the terms:

y = 4 + -2x

Solving

y = 4 + -2x

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Simplifying

y = 4 + -2x

4 0
3 years ago
Ellen claims she has a coin that is weighted so that the probability of heads is 70%.
kvasek [131]
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Ilya [14]

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PLEAS HELP 25 POINTS AND BRAINLEIST
netineya [11]

Answer:

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Use an inverse matrix to solve for the system of equations.
IrinaK [193]

Answer:

(-1, 7, 2)

Step-by-step explanation:

we suppose that ax + by + cz = d for the matrix

D = det [ 0    4     7] = 100

              -6   0    -2

               1    2     8

Dx= det [ 14    4     7] = - 100

               10   0    -2

               -3    2     8

Dy= det [ 0    14    7] = 700

               -6   10    -2

                1    -3    8

Dz = det [ 0    4    14] = 200

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So the solution is:

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(-1, 7, 2)

have a good day!

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