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Fudgin [204]
2 years ago
10

/

x-9}{15} =\frac{2x-9}{10\\}" alt="\frac{x-9}{15} =\frac{2x-9}{10\\}" align="absmiddle" class="latex-formula">
Mathematics
1 answer:
motikmotik2 years ago
5 0

Step-by-step explanation:

\frac{x - 9}{15}  =  \frac{2x - 9}{10}  \\

\frac{x - 9}{3}  =  \frac{2x - 9}{2}  \\

2( x - 9) = 3(2x - 9) \\

2x - 18 = 6x - 27

27 - 18 = 6x - 2x

9 = 4x

x =  \frac{9}{4} \\

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4. x^2+13x=-42
Mrrafil [7]
x^2+13x=-42\ \ \ |+42\\\\x^2+13x+42=0\\\\x^2+6x+7x+42=0\\\\x(x+6)+7(x+6)=0\\\\(x+6)(x+7)=0\iff x+6=0\ \vee\ x+7=0\\\\x=-6\ \vee\ x=-7

Anaswer: <span>a. x = -6 or x = -7</span>

8 0
3 years ago
What is the answer to -3(9-x)+6x
marin [14]

Answer: 9−27

Step-by-step explanation:

4 0
3 years ago
Select a solution for:<br> x^2=81/144
Brilliant_brown [7]

Answer:

x=3/4, -3/4

Step-by-step explanation:

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6 0
3 years ago
Solve this system algebraically.
seraphim [82]
From y-2x+3=0 we have y=2x-3
So we can replace y by 2x-3 in the equation: 9x+2y=5
And we have 9x+2(2x-3)=5
Or 9x+4x-6=5
and 13x=5+6
Or x=11/13, then y=2x-3= 2. 11/13-3=22/13-3= -17/13

So we have the answer <span>{(11/13, -17/13)}</span>
4 0
3 years ago
PLEASE HELP !!!
olga55 [171]

Answer:

B: x=-2

Step-by-step explanation:

This is because x=-2 is where the parabola is split into two equal halves.

5 0
3 years ago
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