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Gwar [14]
3 years ago
7

Expan and simplify the following expression: 3(2a + 3)(2a - 1) - 4 (a^2 - 7)

Mathematics
1 answer:
Mekhanik [1.2K]3 years ago
3 0
= 3(4a^2 + 4a - 3) - 4a^2 + 28
= 12a^2 + 12a - 9 - 4a^2 + 28
= 8a^2 + 12a + 19
= 4a(2a + 3) + 19
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HELP ME PLS HURRY!!! (8)
yarga [219]

Answer:

median<mode

Step-by-step explanation:

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plz mark as brainliest

4 0
2 years ago
Solve for n<br><br> -19=-8+n
laila [671]

-------------------------------------------------------------------------------------------------------------

Answer:  \textsf{n = -11}

-------------------------------------------------------------------------------------------------------------

Given:  \textsf{-19 = -8 + n}

Find:  \textsf{Solve for n}

Solution: In order to solve for n we need to add 8 to both sides which would cancel -8 on the right side and isolate n giving us the value of n.

<u>Add 8 to both sides</u>

  • \textsf{-19 + 8 = -8 + 8 + n}
  • \textsf{-19 + 8 = n}
  • \textsf{-11 = n}

Therefore, the final answer would be that n is equal to -11.

6 0
1 year ago
Read 2 more answers
Homework Progress<br>107 / 285<br>A sequence has three terms.<br>Its term-to-term rule is<br>multiply by 6 and then add 13<br>a)
____ [38]

Answer:

It's C

Step-by-step explanation: I took the test and got it wrong

8 0
2 years ago
Which is an ordered pair on the line 2.5,14 2.25,12 1.25,5 1.5,9
Savatey [412]
I would think that all but one point would be on the line.  One way to approach this problem is to find the equation of the line based upon any two points chosen at random, and then determine whether or not the other points satisfy this equation.  Next time, would you please enclose the coordinates of each point inside parentheses:  (2.5,14), (2.25,12), and so on, to avoid confusion.
                                                               14-12
slope of line thru 1st 2 points is   m = ----------------  =  2/0.25 = 8
                                                              2.50-2.25

What is the eqn of the line:     y = mx + b becomes

                                               14 = (8)(2.5) + b; find b:

14-20 = b = -6.  Then,   y = 8x - 6.

Now determine whether (12,1.25) lies on this line.  

Is 1.25 = 8(12) - 6?  Is 1.25 = 90?  No.  So, unless I've made arithmetic mistakes, (1.25, 5) does not lie on the line thru (2.5,14) and (2.25,12).

Why not work this problem out yourself using my approach as a guide? 



5 0
3 years ago
The ordered pair of (-3,0) is a solution of which system
makkiz [27]

expression

A mathematical symbol, or combination of symbols, representing a value, or relation. Example:   2+2=4


8 0
3 years ago
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