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natita [175]
3 years ago
14

Simplify the expression below:

Mathematics
1 answer:
kifflom [539]3 years ago
6 0

Answer:

C. -7x^2 - 28

Step-by-step explanation:

Firstly simplify the bracket before doing anything;

4x(3x - 7) = 12x^2 - 28x

then go back to the question and substitute the expression(12x^2 - 28x) on the bracket and then work out the question;

12x^2 - 28x -19x^2...then group the values with the same exponent of x,

(12x^2 - 19x^2) - 28x

; -7x^2 - 28x

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I need help with this question please
Bess [88]

Answer:

no understand I live in myanmar .I donot know mathamatic

3 0
3 years ago
if an exterior angle of a regular polygon measures 15 degrees how many sides does it have ?a.23. b.24. c.25
dimaraw [331]

Answer:

B.24

Step-by-step explanation:

we know,

exterior angle  = 360°/n(where 'n' is number of sides)

then,

15° = 360°/n

n = 360°/15°

n = 24



3 0
3 years ago
Number of solutions to a system of equations algebraic. How many solutions does the system have? Can someone help me please....​
Svet_ta [14]

Answer:

A  Exactly 1 solution

Step-by-step explanation:

if we express both equations as y = mx+b

we will see that both equations have different slopes (i.e "m" values are different).

By definition, 2 straight lines of different slopes will intersect at only one location (i.e there is only one solution)

8 0
3 years ago
Read 2 more answers
-0.000167 in scientific notation
tiny-mole [99]
1.67 \times{10}^{ - 4}
6 0
3 years ago
The graph above represents the following polynomial function.
Korvikt [17]

Answer:

C. 0, -1, 3

Step-by-step explanation:

Note: There is no graph. I assume you mean "zeroes/roots" by "solutions".

x(x^2-2x-3)=0

/(x^2-2x-3)

x=0


x^2-2x-3 = x^2+x-3x-3 = x(x+1) + ( -3(x+1) = (x-3)(x+1)

/(x-3) --> x +1 =0, x=-1

/(x+1) --> x-3 = 0, x=3


6 0
3 years ago
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