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Aleks [24]
2 years ago
14

Factor completely x^2-4

Mathematics
2 answers:
umka2103 [35]2 years ago
3 0

Answer: (x + 2) (x - 2)

Step-by-step explanation:

Solnce55 [7]2 years ago
3 0

Answer:

(x + 2) (x - 2)

Step-by-step explanation:

Given the quadratic expression,  x² - 4:

Use the <u>Difference of squares</u> factoring formula:

u² - v² = (u + v)(u - v)

Determine what are possible factors that could have a product of -4:

Since -2 × 2 = -4, these can be used as factors.

Therefore, the factors of the quadratic expression, x² - 4 are:

(x + 2) (x - 2)

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Find the unit rate. 6 2/5 revolutions in 2 2/3 seconds
Brums [2.3K]
The unit rate will be in revolutions per second. That means divide number of revolutions by number of seconds.

first convert from mixed fraction.
6 2/5 = 32/5 revolutions
2 2/3 = 8/3 seconds

32/5 ÷ 8/3
flip multiply
32/5 × 3/8 = 12/5 revolutions per second

12/5 = 2 2/5 revolutions per second


6 0
3 years ago
Determine whether the lines are parallel or perpendicular or neither. 2x=y−10 and y=−2x
MrRa [10]

Put the first equation in slope-intercept form, or y = mx + b. Start by subtracting y from both sides.

2x - y = -10, subtract 2x from both sides.

-y = -10 - 2x

Divide both sides by negative one.

y = 10 + 2x

To find the slope when the equations are in slope-intercept form you look at the coefficient of x. The first equation has the slope of 2 (which we just found), and the second equation has the slope of -2.

Parallel lines have the same slope and perpendicular lines have opposite reciprocal slopes. Since 2 and -2 are neither of these, your answer is neither.

7 0
3 years ago
Kelly bought a new pair of shoes for $9.95. Wendy paid 4.2 times this amount for a new pair of shoes. What price did Wendy pay f
ExtremeBDS [4]

wendy paid $41.79.

kelly's shoes were $9.95, and wendy paid 4.2 times more.

just multiply 9.95 with 4.2.

9.95 x 4.2 = 41.79

7 0
3 years ago
You purchase a new flat screen TV for $878.99. You are charged sales tax at a rate of 6%. What is your total balance due when yo
goblinko [34]

Answer:

Sales tax: $52.74

■ Cost/Price before ST: $878.99

■ Total Cost/Price including ST: $931.73

Step-by-step explanation:

3 0
3 years ago
Jasmine wants to use her savings of $1,128 to buy video games and movies. The total price of the movies she bought was $72. The
maria [59]

Answer:

The answer is 24. First 1128 - 72 equals 1056 then divide by 43 which equals 24.55 but u cant buy 24.55 VD so its just 24

Step-by-step explanation:

5 0
3 years ago
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