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BlackZzzverrR [31]
2 years ago
5

No, one, or infinitely many solutions

Mathematics
1 answer:
Aleks04 [339]2 years ago
4 0

Answer:

one, no, one, infinitely

Step-by-step explanation:

a. you can get 7x = 21 - 21 = 0 ==> x = 0

b. subtract 12x from both sides ==> get 15 = -15, which is not true

c. -5x-5x=25+25 ==> -10x = 50 ==> x = -5

d. get -2x -6 -7 = -2x - 6 - 7 ==> so it's infinitely

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How to change base of logarithms: Best answer gets 27 points and brainliest answer
AlekseyPX

Answer:

1/3

Step-by-step explanation:

 To change from one base to another, we use the formula

Logb x = Loga x/Loga b

log1/9  (3^(1/3) /3)


log3 ((3^(1/3) /3))

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

log3 (1/9)


Log a /b = log a - log b

and 1/9 = 3^-2

log3 ((3^(1/3) ) - log3 (3)

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

log3 (3^-2)


log a^b  = blog a


1/3 log3 (3 ) - log3 (3)

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

-2log3 (3)

We know log3 (3) =1


1/3 (1) - 1

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

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1/3  - 1

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

-2


-2/3

------

-2

Copy dot flip

-2/3 * -1/2


1/3

6 0
3 years ago
8 w + 12 = -12<br> Helpppppp
aliina [53]

Answer:

w = -3

Step-by-step explanation:

8w + 12 = -12

use inverse operations:

8w + 12 = -12

-12         -12

8w = -24

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7 0
3 years ago
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ivann1987 [24]

I believe the solution is x=\frac{y-a}{b}.

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6 0
3 years ago
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3

To calculate a fraction of a quantity, multiply the quantity by the numerator of the fraction and divide by the denominator

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3 0
3 years ago
Please help who is GOOD at math?!?!?!
Debora [2.8K]
3x+6y=12
-3x -3x
6y=-3x+12
*divide by 6 on both sides*
y= -1/2x+2
Slope: -1/2
Y-intercept: 2
4 0
3 years ago
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