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77julia77 [94]
2 years ago
9

2x+3y=20 -2x+y=4 Solve algebraic

Mathematics
1 answer:
maxonik [38]2 years ago
7 0
The first one is 2x + 3y = 5xy




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An altitude is drawn from the vertex of an isosceles triangle, forming a right angle
Hatshy [7]

Answer:56.8 inches

Step-by-step explanation:

For perimeter we must find the lengths of the 2 diagonal sides of the triangle which are the same because it is isosceles.

the triangle is cut directly in half so both halves of the base are 17/2

17/2 = 8.5

solve through pythagoren theorum

altitude^2 + (half of base)^2 = (diagonal length)^2

18^2 + (8.5)^2 = (diagonal length)^2

324 + 72.25 = (diagonal length)^2

396.3 = (diagonal length)^2

\sqrt{396.3} = diagonal length

diagonal length = 19.9

diagonal length + diagonal length + base = perimeter

19.9 + 19.9 + 17 = perimeter

56.8 inches = perimeter

6 0
2 years ago
Work out the volume of a cuboid <br> 10cm by 3cm by 2cm?
Firlakuza [10]
10 x 3 x 2 = the volume
10 x 3 = 30
30 x 2 = 60 cm^3
it is cm^3 because all of the numbers you have are in cm
8 0
3 years ago
How much would $200
sveta [45]

Answer:

Not very sure, I think it would be $150, sorry if wrong

Step-by-step explanation:

7 0
2 years ago
What is the value of (-3+3i)+(-2+3i)?<br><br> -5-6i<br> -5+6i<br> 5+6i<br> 5-6i
Luda [366]

Step-by-step explanation:

-3+3i-2+3i

-5+6i

Hope that helps you

8 0
2 years ago
Help <br> 7. Given the figure, find the desired measurements
EastWind [94]

Answer:

  m∠F = 66°

  m∠D = 57°

Step-by-step explanation:

It looks like you have ...

  ∠D = ∠E = (4x +1)°

  ∠F = (5x -4)°

The sum of the angles in the triangle is 180°, so we have ...

  2(4x +1) +(5x -4) = 180

  13x -2 = 180

  x = 182/13 = 14

Then the angle measures are ...

  ∠D = ∠E = (4(14) +1)° = 57°

  ∠F = (5(14) -4)° = 66°

__

m∠F = 66°

m∠D = 57°

4 0
3 years ago
Read 2 more answers
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