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Shtirlitz [24]
3 years ago
13

Simplify 2x^2-1+4x^2-5

Mathematics
1 answer:
alekssr [168]3 years ago
8 0

Answer:

6x^2-6

Step-by-step explanation: algebra

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Simplify the Absolute value of 120+x , if x<−120
Brilliant_brown [7]

Answer:

<h2>|120 + x| = -x - 120 for x < -120</h2>

Step-by-step explanation:

|120+x|=\left\{\begin{array}{ccc}120+x&for&x\geq-120\\-(120+x)&for&x

3 0
3 years ago
Tahmar knows the formula for simple interest is I = Prt, where I represents the simple interest on an amount of money, P, for t
rewona [7]

Answer:

P = $80

Step-by-step explanation:

I = P*r*t

P = I/rt

Where,

simple interest, I = $20

Interest rate, r = 5%

Time, t = 5 years

P = I / rt

= 20 / 5% * 5

= 20 / 0.05 * 5

= 20 / 0.25

= 80

P = $80

3 0
2 years ago
Find the coefficient of the 4th term in expansion of (x +2 )^5
LuckyWell [14K]
(x + 2)^5=(x+2)^2\cdot{(x+2)^2}\cdot{(x+2)}\\\\(x+2)^5=(x^2+4x+4)\cdot{(x^2+4x+4)}\cdot(x+2)

(x+2)^5=(x^4+8x^3+24x^2+32x+16)\cdot(x+2)

(x+2)^5=x^5+10x^4+40x^3+80x^2+80x+32

10

6 0
3 years ago
What is m 2DEC?<br> In square ABCD, we know:<br> AB = 6 and BE = 4.2
Alex787 [66]

Answer:

As mentioned ABCD is a square

So <DEC is always 90 degree

3 0
3 years ago
Today, the mailman sorted 57 letters during his first hour of work, 69 letters during his second hour, 81 letters during his thi
mars1129 [50]
The answer is 93 

If we sorted out the number of each hours, the sequence will look like this

57 _    69  _  81  _ x  _ 105   

(in which x is the fourth hour of work)


We can see from the sequence that each hours, the mailman add additional 12 letters.
(69 - 57 = 12)
(81 - 69 = 12)   . . . . proof


So, the amount of letters on the fourth hour would be:
81 letters  + 12 letters = 93 Letters
5 0
3 years ago
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