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IrinaK [193]
2 years ago
15

( 4x2 - 4 ) = ( 2x - 2)(2x + ---)

Mathematics
1 answer:
Ad libitum [116K]2 years ago
4 0

Answer:

4x^2-4 = 4(x+1)(x-1)

REMEMBER: factoring a perfect square

Step-by-step explanation:

You might be interested in
Please help me in questions 15 and 21 with their inequalities and graph
aleksklad [387]

Answer:

x >= 7 OR x < -8

n <= -3 AND n > -6

Step-by-step explanation:

15) 7x - 6 >= 43 OR 10x + 4 < -76

7x >= 43 + 6 OR 10x < -76 - 4

7x >= 49 OR 10x < -80

x >= 7 OR x < -8

you can draw based on this

for >= it is full dot for < it is like circle on the graph

you have to draw both x>= 7 , x < -8 on the same line because it is OR

so both ranges of x are possible

21) 3 + 2n <= -3 AND 1 - 3n < 19

2n <= -3 -3 AND -3n < 19 - 1

2n <= -6 AND -3n < 18

n <= -3 AND 3n > -18

n <= -3 AND n > -6

so it lies between -6 and -3

u can refer pictures below

8 0
2 years ago
In a whole 40% is 1380 what does the other 60% equal
Karolina [17]
If you divide 2380 by 4, it will give you 10% of the whole:

1380/4=345

Then you can times 345 by 6 To find the 60%:

345*6=2070

PS Please check my calculations with a calculator as I worked these out in my head.
5 0
3 years ago
Mar in was a bat and hit 7 out 8 balls. How can you find his batting precentage
777dan777 [17]
Divide 7 by 8 then multiply what you get by 100.
7 0
3 years ago
Read 2 more answers
Ms. Walker's class set up an online fund with a goal to raise $1,280 to go on a field trip. Ms. Walker starts the fund by deposi
madreJ [45]
What you can use for this case is a function of the potential type.
 We have then
 y = a (b) ^ x
 Where we have:
 Walker starts the fund by depositing $ 5
 a = 5
 Each week the balance of the fund is twice the balance of the previous week:
 b = 2
 The function is:
 y = 5 (2) ^ x
 The number of weeks to reach $ 1280 is 8 weeks.
 Check:
 y = 5 (2) ^ 8
 y = 1280
 Answer:
 An equation can be used to find the number of weeks, x, after which the balance of the fund will reach $ 1,280 is:
 y = 5 (2) ^ x
 The number of weeks that it takes to reach the class goal is
 8 weeks
4 0
3 years ago
Read 2 more answers
A certain forest covers an area of 1700 km^2. Suppose that each year this area decreases by 3.25%. What will the area be after 6
Olenka [21]

y= 1700 (1- .0325) ^15

= 1700(.9675) ^15

=1700(.60920660)

= 1035.65 km

Hope this helps!

4 0
3 years ago
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