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mars1129 [50]
3 years ago
13

Carla and Jordan were trying to solve the equation: (x+1)(x-1)=8(x+1)(x−1)=8left parenthesis, x, plus, 1, right parenthesis, lef

t parenthesis, x, minus, 1, right parenthesis, equals, 8 Carla said, "I'll multiply (x+1)(x-1)(x+1)(x−1)left parenthesis, x, plus, 1, right parenthesis, left parenthesis, x, minus, 1, right parenthesis and rewrite the equation as x^2-1=8x 2 −1=8x, squared, minus, 1, equals, 8. Then I'll add 111 both sides and take the square root." Jordan said, "The left-hand side is factored, so I'll use the zero product property." Whose solution strategy would work?
Mathematics
1 answer:
defon3 years ago
5 0

Answer:

Only Carla

Step-by-step explanation:

Its the right way to solve (x+1)(x-1)=8

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nignag [31]

first find the difference

24-3 =21

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5 0
3 years ago
A rectangle has a height of 5 and a width of 4x^2 – 2x – 6.
bogdanovich [222]

The area of the rectangle is 20x^{2} -10x-30 units.

Step-by-step explanation:

Step 1:

The area of a rectangle is obtained by multiplying the length with the width of the rectangle.

Considering this a whole rectangle, the length of the rectangle is 5 units and the width is the sum of 4x^{2}, -2x, and -6.

So the length of the rectangle = 5 units and

the width of the rectangle = 4x^{2} -2x-6 units.

The area of a rectangle = (length)(width).

Step 2:

By substituting the known values, we get

The area of the rectangle = (5) (4x^{2} -2x-6) = 20x^{2} -10x-30.

So the area of the rectangle is 20x^{2} -10x-30 units.

3 0
3 years ago
If ADEF is reflected over the x-axis, what would be the coordinates of point F?
Brut [27]

Answer:

Please check the explanation.

Step-by-step explanation:

Let the coordinates of the point F be (x, y).

When a point F(x, y) is reflected over the x-axis, the x-coordinate of the point F remains the same, and the y-coordinate of the point reverses the sign.

Thus, the rule of reflection over the x-axis:

F(x, y)   →    F'(x, -y)

Here,

F'(x, -y) would be coordinates of point F after the reflection over the x-axis.

Let say, the point F(1, 2).

The coordinate of the point F after the reflection over the x-axis would be:

F(1, 2)   →    F'(1, -2)

Thus, F'(1, -2) would be the coordinates of point F after the reflection over the x-axis.

6 0
3 years ago
There is 135 of masking tape on a roll. Henry has 6 rolls. How many feet of masking tape does he have in all?
g100num [7]
810 total feet because 135 times 6 is 810
3 0
3 years ago
What would the answer be ? Thank You!!
Bogdan [553]

Answer:

2.33 = BC

Step-by-step explanation:

Since this is a right triangle, we can use trig functions

tan theta = opp / adj

tan B = AC / BC

tan 25 = AC / 5

Multiply each side by 5

5 tan 25 = BC

2.331538291 = BC

To the nearest hundredth

2.33 = BC

3 0
3 years ago
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