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2 years ago

Adi used algebra tiles to represent the product (negative 2 x minus 1)(2 x minus 1).

Mathematics

1 answer:

MariettaO [177]2 years ago

6 0

The true statement is (b) use of incorrect header

<h3>How to determine the true statement?</h3>

The product expression is given as:

(-2x - 1)(2x - 1)

Expand the expression

(-x - x - 1)(x + x - 1)

This means that the header of the algebra tiles would be:

-x, -x, 1 and x, x and -1

From the figure, we can see that this is incorrectly represented

Hence, the true statement is (b)

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Given that g(x)=3x-7 <br> Find the value of k<br> <img src="https://tex.z-dn.net/?f=g%5E%7B2%7D%20%284k%2F3%29%3D8" id="TexFormu

frez [133]

Answer:

{ $\frac{7}{4}$ - $\frac{\sqrt{2} }{2}$ , $\frac{7}{4}$ + $\frac{\sqrt{2} }{2}$ }

Step-by-step explanation:

ax² + bx + c = 0

$x_{12}$ = ( - b ± $\sqrt{b^2 -4ac}$ ) ÷ 2a

~~~~~~~~~~~

g(x) = 3x - 7

g²(x) = (3x - 7)²

g²(x) = 9x² - 42x + 49

g²( $\frac{4k}{3}$ ) = 9( $\frac{4k}{3}$ )² - 42( $\frac{4k}{3}$ ) + 49

9( $\frac{4k}{3}$ )² - 42( $\frac{4k}{3}$ ) + 49 = 8

16k² - 56k + 41 = 0

a = 16 , b = - 56 , c = 41

D = b² - 4ac = ( - 56)² - 4(16)(41) = 512 = $2^{9}$

$k_{1}$ = ( 56 + √ $2^{9}$ ) ÷ 32 = $\frac{7}{4}$ + $\frac{\sqrt{2} }{2}$

$k_{2}$ = $\frac{7}{4}$ - $\frac{\sqrt{2} }{2}$

3 0

3 years ago

PLEASE HELP i am on a time limit

Sunny_sXe [5.5K]

James is weird , y would he want to know

5 0

4 years ago

Use any method to solve the equation. If necessary, round to the nearest hundredth. 9x^2 - 21 = 0

meriva

1.527 is that one of the options?

3 0

3 years ago

Which is the equation of the given line

Elis [28]

y=-2x
I hope I am right

3 0

3 years ago

There are 7 girls and 3 boys in a class. Two students are to be

horsena [70]

Answer:

7/15 is the probability of selecting a boy and a girl.

Step-by-step explanation:

Combination = nCr = n!/((n-r)!r!)

((7C1)(3C1))/(10C2)

= (7*3)/45

=21/45 = 7/15 the probability of selecting a boy and a girl.

8 0

3 years ago