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uysha [10]
3 years ago
6

Factor completely: x2-4

Mathematics
1 answer:
Lelechka [254]3 years ago
5 0

Answer:

(x+2)(x-2)

Step-by-step explanation

x times x equals x^2, 2 times x equals 2x, -2 times x equals -2x, and 2 times -2 equals -4. If you add that up, the x-values cancel out, leaving the x^2 and the -4. (This explanation is working it backwards which is the easiest way IMO)

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Jane finished a race in 7 minutes. How many seconds is this.
Serggg [28]

Answer:

420 seconds

Step-by-step explanation:

(60 seconds in a minute, 60 x 7 = 420)

#Nova

7 0
3 years ago
Read 2 more answers
Jan has $130. If she saves $25 per week, in how many weeks will she have $600?
serious [3.7K]

Let's represent the number of weeks with the variable 'w':

130 + 25w = 600

We subtract both sides by 130:

25w = 470

w = 18.8

We round up:

It will take her 19 weeks.

4 0
3 years ago
Read 2 more answers
PLEASE HELP ME ASAP!
maw [93]

Answer:

Yes

Step-by-step explanation:

for pens you are adding 3 each time

for boxes you are adding 1 each time

it is correct because they all have the same unit rate

3/1=3

6/2=3

9/3=3

12/4=3

7 0
3 years ago
AWARDING EXTRA POINTSWhat is the distance between point A (-3, -2) and Point B (4, -7)?
kenny6666 [7]

Answer:

Hi there!

Your answer is:

<em>8</em><em>.</em><em>6</em><em> </em><em>units</em>

Step-by-step explanation:

The distance formula is

√ ( (x2-x1)^2 + (y2-y1)^2 )

In your points:

A (-3, -2)

-3 is x1

-2 is y1

B (4, -7)

4 is x2

-7 is y2

Plug in to distance formula

√ ( 4-( -3))^2 + ( -7 - (-2))^2

√ (4+3)^2 + (-7+2)^2

√ (7^2) + ( -5)^2

√ 49 + 25

√ 74

This equals roughly 8.6 units!

4 0
3 years ago
Which triangle congruence is this?<br> SSS<br> SAS<br> AAS<br> ASA<br> HL
Tanzania [10]
Aas i belive . If not consult the other answer
6 0
3 years ago
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