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cluponka [151]
4 years ago
5

PLEASE HELP WITH NUMBER 11 ASAP!!!! (Please show how you got the answer)

Mathematics
1 answer:
Alex777 [14]4 years ago
7 0

Answer:

Triangle B is right

Step-by-step explanation:

Using the converse theorem of Pythagoras.

If the square of the longest side in a triangle equals the sum of the squares of the other 2 sides then the triangle is right.

Triangle A

longest side squared = 36² = 1296

26² + 18² = 676 + 324 = 1000 ≠ 1296

Hence triangle A is not right

Triangle B

longest side squared = 25² = 625

20² + 15² = 400 + 225 = 625 ← correct

Hence triangle B is right


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Which ever expression is 3x + 21 + 10 ..... 21 + 10 = 31 .... So it'll be 3x + 31 .
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3 years ago
What is the vertex form of y=2x^2-8x+1
bezimeni [28]

Answer:

2(x-2)^2-7

Step-by-step explanation:

y=2x^2-8x+1

When comparing to standard form of a parabola: ax^2+bx+c

  • a=2
  • b=-8
  • c=1

Vertex form of a parabola is: a(x-h)^2+k, which is what we are trying to convert this quadratic equation into.

To do so, we can start by finding "h" in the original vertex form of a parabola. This can be found by using: \frac{-b}{2a}.

Substitute in -8 for b and 2 for a.

\frac{-(-8)}{2(2)}

Simplify this fraction.

\frac{8}{4} \rightarrow2

\boxed{h=2}

The "h" value is 2. Now we can find the "k" value by substituting in 2 for x into the given quadratic equation.

y=2(2)^2-8(2)+1

Simplify.

y=-7

\boxed{k=-7}

We have the values of h and k for the original vertex form, so now we can plug these into the original vertex form. We already know a from the beginning (it is 2).

a(x-h)^2+k\\ \\ 2(x-2)^2-7

6 0
3 years ago
How many are 3 raised to 2 ???​
Anettt [7]

Answer:

\huge \boxed{9}

Step-by-step explanation:

3 raised to 2 is 3 to the power of 2.

3^2 =3 \times 3 = 9

3 is multiplied by itself.

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4 years ago
A railway engine of mass 4000kg is moving down a track at a constant speed of 3m/s
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Answer:

1 minute
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4 0
3 years ago
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12x 3000 this is for u my bud answer it quickly
Shkiper50 [21]

Answer:

I know this! It's 36,000.


Step-by-step explanation:


5 0
4 years ago
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