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VikaD [51]
3 years ago
10

Solve the equation: (-11) + [9] =

Mathematics
2 answers:
Arada [10]3 years ago
7 0
Negative two is the answer
Sidana [21]3 years ago
5 0

Answer:

-2

Step-by-step explanation:

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What type of triangle is formed by joining the points D(7, 3), E(8, 1), and F(4, -1)?
attashe74 [19]
D(7,3) \\
E(8,1) \\
F(4,-1)

The lengths of the sides of the triangle:
\overline{DE}=\sqrt{(8-7)^2+(1-3)^2}=\sqrt{1^2+(-2)^2}=\sqrt{1+4}=\sqrt{5} \\ \\
\overline{DF}=\sqrt{(4-7)^2+(-1-3)^2}=\sqrt{(-3)^2+(-4)^2}=\sqrt{9+16}=\sqrt{25}=5 \\ \\
\overline{EF}=\sqrt{(4-8)^2+(-1-1)^2}=\sqrt{(-4)^2+(-2)^2}=\sqrt{16+4}=\sqrt{20}= \\
=\sqrt{4 \times 5}=2\sqrt{5}

No sides are equal to each other, so it's a scalene triangle.

Check if the sides satisfy the Pythagorean theorem:
(\sqrt{5})^2 + (2\sqrt{5})^2=5^2 \\
5+20=25 \\
25=25 \\
true
They do, so it's a right triangle.

The triangle is a right scalene triangle.
7 0
3 years ago
Read 2 more answers
What is your favorit food
Oduvanchick [21]

Answer:

salmon and mashed potatoes

Step-by-step explanation:

yum

5 0
2 years ago
Read 2 more answers
Help on this please?
Anna [14]

Answer:

angle 1 should equal to 54.

angle 2 should equal to 126.

Step-by-step explanation:

2x - 8 + 4x + 2 = 180

2x + 4x - 8 + 2 = 180

6x - 6 = 180

6x - 6 + 6 = 180 + 6

6x = 186

6x ÷ 6 = 186 ÷ 6

x = 31

---------------------------------------------

2x - 8 = A1

2(31) - 8 = A1

62 - 8 = A1

54 = A1

-----------------------------------------------

4x + 2 = A2

4(31) + 2 = A2

124 + 2 = A2

126 = A2

7 0
2 years ago
Mix some of the $5.50 per pound with 100 pounds of $6.25 per pound to get a $6 per pound mix
Dvinal [7]

x lbs * 5.5 + 100 lbs * 6.25 = (x+100) * 6.00

distribute

5.5x + 625 = 6x+600

subtract 5.5 x from each side

625 = .5x +600

subtract 600 from each side

25 = .5x

divide each side by .5

x = 100

You need 100 pounds of the 5.50 mix

8 0
2 years ago
Read 2 more answers
If f(x) = 3x - 2 and g(x) = 2x+1, find (f- g)(x).​
Novosadov [1.4K]

Answer:

Step-by-step explanation:

(f  - g)(x) = x - 3

Line up these functions vertically:

  f(x) =   3x - 2

-g(x) = -(2x + 1)

--------------------

(f  - g)(x) = x - 3 (answer)

7 0
3 years ago
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