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RideAnS [48]
3 years ago
12

What are the solutions of 2x^2+3x-7=x^2+5x+39

Mathematics
1 answer:
sveticcg [70]3 years ago
7 0

Answer:

{x}^{2}  - 2x - 46

Step-by-step explanation:

{2x}^{2}  + 3x -  7 =  {x}^{2}  + 5x + 39

Collect like terms

{2x }^{2}  -  {x}^{2}  + 3x  - 5x - 7 - 39

{ x}^{2}  - 2x - 46

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12.3 Write the first five terms of the sequence whose general term is <img src="https://tex.z-dn.net/?f=a_%7Bn%7D%3D3%5E%7Bn%7D%
weeeeeb [17]

Answer:

7,13,31,85,247......

Step-by-step explanation:

a_n =3^n + 4

        \sf a_1=3^1 + 4 = 3 + 4 = 7\\\\a_2 = 3^2 + 4 = 9 + 4 = 13\\\\a_3 = 3^3 + 4 = 27 + 4 = 31\\\\a_4 = 3^4  + 4 = 81 + 4 = 85\\\\a_5 = 3^5 + 4 = 243 + 4 = 247

8 0
2 years ago
The simple interest on an investment of $8000 for one year is $360.
elena55 [62]
I = PRT
$360 = $8000 x R X 1
$360 = $8000 X R
$360/$8000 X R /$8000
0.045 = R
R= 0.045 * 100
R = 4.5%
8 0
3 years ago
A chemical company mixes pure water with their premium antifreeze solution to create an inexpensive antifreeze mixture. The prem
Ne4ueva [31]

Answer:

  • premium: 165 gallons
  • water: 120 gallons

Step-by-step explanation:

Let 'a' represent the amount of 95% antifreeze in the mix. Then the amount of water is (285 -a). The mix has this amount of antifreeze in it:

  0.95a +0(285 -a) = 0.55(285)

  a = 0.55/0.95(285) = 165 . . . gallons of 95%

  285 -a = 285 -165 = 120 . . . . gallons of water

There are 120 gallons of water and 165 gallons of premium antifreeze in the mixture.

6 0
2 years ago
Type a digit that makes this statement true.
Archy [21]

Answer:

So information at the bottom:

since every number in a thousand spot needs to have 3 digest, we need to add a zero onto 29,422,33<u>0</u>. If we didn’t add a zero, then the problem wouldn’t make much since. So if we divide 29,422,330 by 2, our answer would be 14,711,165. A whole bunch of numbers, but nothing that can’t be solved!

<h3>Hope this helps!✌️</h3>

5 0
3 years ago
Read 2 more answers
I need help automatically
Andreas93 [3]
I believe the answer to that question is -20
3 0
3 years ago
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