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VladimirAG [237]
3 years ago
5

A triangle has two sides that are perpendicar. Could the triangle be isosceles,epuilateral, or scalene?

Mathematics
2 answers:
Dahasolnce [82]3 years ago
8 0
It could be isosceles or scalene. It could not be epuilateral.
coldgirl [10]3 years ago
5 0
Yes triangles come in different shapes and sizes and yes in some cases they can be equilateral,isosceles,and even scalene
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Substitute the values of x and y into the expression -3x2 + 2y2 + 5xy - 2y + 5x2 - 3y2. Match that value to one of the numbers.
Vinvika [58]

Answer:

1. Putting  x = 0.5, y = -1/10 gives  0.44

2. Putting  x = -1, y = -3  gives 14

3. Putting x =3/4 , y = 2/5 gives 1.665

4. Putting  x = 0, y = 2.5 gives - 11.25

5.  Putting x = √2, y = √2 gives 17

6. Putting x = 2, y = -1  gives - 1

Step-by-step explanation:

-3x2 + 2y2 + 5xy - 2y + 5x2 - 3y2

1. Putting  x = 0.5, y = -1/10

-3(0.5)^2 + 2(-1/10)^2 + 5(-0.05) - 2(-1/10) + 5(0.5)^2 - 3(-1/10)^2

= -0.75 +0.02 - 0.25 +0.2 + 1.25- 0.03

= 0.44

2. Putting  x = -1, y = -3

-3(-1)^2 + 2(-3)^2 + 5(3) - 2(-3) + 5(-1)^2 - 3(-3)^2

= -3 +18 +15+6+5-27

= 14

3. Putting x =3/4 , y = 2/5

-3(3/4)^2 + 2(2/5)^2 + 5(6/20) - 2(2/5) + 5(3/4)^2 - 3(2/5)^2

=- 27/16 +8/25 +30/20 -4/5 +45/16 - 12/25

= 18/16 - 24/25 + 30/20

= 18/16 - 96+150/100

= 18/16 +54/100

= 1800+ 864/1600

= 2664/1600

=1.665

4. Putting  x = 0, y = 2.5

-3(0)^2 + 2(2.5)^2 + 5(0) - 2(2.5) + 5(0)^2 - 3(2.5)^2

= 12.5 - 5.0 - 18.75

= -11.25

5.  Putting x = √2, y = √2

-3(√2)^2 + 2(√2)^2 + 5(√2.√2) - 2(√2) + 5(√2)^2 - 3(√2)^2

= -6 +4+10-4+19-6

= 17

6. Putting x = 2, y = -1

-3(2)^2 + 2(-1)^2 + 5(-2) - 2(-1) + 5(2)^2 - 3(-1)^2

= -12+2 -10 +2 +20 -3

= -1

4 0
3 years ago
Which equation is equivalent to 3[x + 3(4x – 5)] = 15x – 24?
makkiz [27]

Hello from MrBillDoesMath!

Answer:

x = 7/8

Discussion:

3[x + 3(4x – 5)] = 15x – 24 =>

3x + (3*3)(4x-5) = 15x - 24  =>

3x + 9*(4x) - (3*3)*5 = 15x - 24 =>

3x + 36x  - 45 = 15x - 24  =>   (add 24 to each side)

3x + 36x - 45 + 45 = 15x - 24 + 45 =>

39x = 15x + 21  =>                    (as 45-24 = 21)

39x-15x = 21 =>                        (subtract 15x from both sides)

24x = 21 =>

x = 21/24 = -7/8


Regards,  

MrB

P.S.  I'll be on vacation from Friday, Dec 22 to Jan 2, 2019. Have a Great New Year!


5 0
3 years ago
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lesantik [10]

Answer:

HN congruent to NL

Step-by-step explanation:

They have a line crossing both of them, signifiying congruence.

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How many pounds go into 2. 5 tons
daser333 [38]
2.5 tons = 5000 pounds

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3 years ago
What is one reason why we add and subtract decimals
NemiM [27]
Because if you did not you would not have a exact answer.

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