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3 years ago

I’m new to this app! And i really need help.. PLEASE HELP!!!!!

Mathematics

1 answer:

aalyn [17]3 years ago

8 0

Step-by-step explanation:

a) $x^2 - 5x + 4 = (x - 1)(x - 4)$

b) $x^2 - 10x + 9 = (x - 1)(x - 9)$

c) $x^2 - 16x + 64 = (x - 8)^2$

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True or False: (x + 3)2 = x2 + 9

malfutka [58]

Answer:

false

Step-by-step explanation:

3 0

3 years ago

hjlf

4x - 3y + 20 = 0....4x - 3y = -21

4x - 3y = -21.....multiply by -2
5x - 6y = -25
----------------
-8x + 6y = 42 (result of multiplying by -2)
5x - 6y = -25
---------------add
-3x = 17
x = -17/3

this system of equations has 1 solution

4 0

3 years ago

Perform the indicated operation. (-9 + 21) - (-12 + 4) =

Trava [24]

Answer:

Step-by-step explanation:

-9+21= 21

-12+4=-8

21-(-8)=29

6 0

3 years ago

How do you find the missing number of a perfect square trinomial? 25x^2 - 60x + ___

Harrizon [31]

Answer:

Step-by-step explanation:

Compare what you have to the square ...

(a +b)^2 = a^2 +2ab +b^2

Your "a" is √(25x^2) = 5x

Your "2ab" is -60x. Since you know "a", you can find "b".

2ab = -60x

2(5x)b = -60x . . . . . . . substitute for "a"

b = -60x/(10x) = -6

Then the missing term is b^2 = (-6)^2 = 36.

Your trinomial is ...

25x^2 -60x +36

4 0

3 years ago

V Find the distance between the points (5, -3) and (5, 4).

Gwar [14]

Answer:

Distance = 7

Step-by-step explanation:

A(5 , -3) B(5,4)

D = √((4 - (-3))² + (5 - 5)²)

D = √(7² +0)

D = 7

8 0

3 years ago