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goldenfox [79]
3 years ago
5

When x=9, the value of x2−2 is

Mathematics
2 answers:
VikaD [51]3 years ago
7 0
The depends on what that two is did you mean 2x or x^2 because if you meant 2x it’s 16 but if you meant x^2 it’s 79
Roman55 [17]3 years ago
5 0

Answer:

16

Step-by-step explanation:

x= 9

x×2=2x

9×2=18

18-2= 16

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(3x − 4)(2x)2 + 2x − 1).
zzz [600]
<span><span><span><span><span>(<span><span>3x</span>−4</span>)</span><span>(<span>2x</span>)</span></span><span>(2)</span></span>+<span>2x</span></span>−1

</span>Distribute:

<span>=<span><span><span><span><span><span>12<span>x2</span></span>+</span>−<span>16x</span></span>+<span>2x</span></span>+</span>−1

</span></span>Combine Like Terms:

<span>=<span><span><span><span>12<span>x2</span></span>+<span>−<span>16x</span></span></span>+<span>2x</span></span>+<span>−1</span></span></span><span>=<span><span><span>(<span>12<span>x2</span></span>)</span>+<span>(<span><span>−<span>16x</span></span>+<span>2x</span></span>)</span></span>+<span>(<span>−1</span>)</span></span></span><span>=<span><span><span>12<span>x2</span></span>+<span>−<span>14x</span></span></span>+<span>−1

</span></span></span>Answer:<span>=<span><span><span>12<span>x2</span></span>−<span>14x</span></span>−<span>1

hope this helps! was there meant to be a parenthesis by the 2 + 2x - 1??  </span></span></span>
4 0
3 years ago
Tell whether the triangle with the given side lengths is a right triangle.<br> 12cm, 35cm, 37cm
Vlada [557]

Answer:

Yes

Step-by-step explanation:

Pythagorean theorem states that for right triangles a^2 + b^2 = c^2, which is true for this as a^2 = 1225 + 144 (b^2) = 1369,

1369 = 37^2

7 0
3 years ago
Find the missing factor.<br> 7s^2 + + 13s + 6 = (7s + 6)<br> )
Anton [14]

Answer:

71s

Step-by-step explanation:

The question we have at hand is 7s² + ___ + 13s + 6² = (7s + 6)². We can expand the perfect equation " (7s + 6)² " in order to find our solution. A perfect square consists of 3 terms, and hence the term in the blanks must add to 13s to form another term.

Applying the perfect square formula : ( a + b )² = a² + 2ab + b², let's expand the expression,

(7s + 6)² = ( 7s )² + 2( 7s )( 6 ) + ( 6 )² =  7s² + 84s + 6²

84s - 13s = 71s, which fills in the blank provided.

5 0
3 years ago
What is the estimate of forgive 6in by 4in
NNADVOKAT [17]

Find area of the semi circle.

The diameter is, half of that would be the radius, which is 3.

\frac{\pi \cdot 3^2}{2} = 14.1

Find the area of the rectangle.

6 * 4 =24

Add the two areas together.

24 + 14.1 = 38.1

38.1in^2

6 0
3 years ago
Dave's favorite recipe (spaghetti pie) calls for 20 ounces of ground sausage. Since it's awesome, everybody wants some, so he de
FromTheMoon [43]

Answer:

hi

Step-by-step explanation:

6 0
3 years ago
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