2 years ago

BRAINLIEST TO CORRECT ANSWER!!!!! PLS HELP ME

Mathematics

1 answer:

olga_2 [115]2 years ago

7 0

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27^x = 9^x − 4 Question 1 options: x = 8 x = 4 x = −4 x = −8

Mariulka [41]

Answer:

x = -8

Step-by-step explanation:

Given the equation:

$27^x=9^{x-4}$

Note that

$27=3^3\\ \\9=3^2,$

then

$27^x=(3^3)^x=3^{3x}\\ \\9^{x-4}=(3^2)^{x-4}=3^{2(x-4)}$

Rewrite the equation as

$3^{3x}=3^{2(x-4)},$

then

$3x=2(x-4)\\ \\3x=2x-8\\ \\3x-2x=-8\\ \\x=-8$

4 0

3 years ago

Find the inverse function. f(x) = Vx - 1+4

seraphim [82]

Answer:

f^-1(v)=v/x-3/x

Step-by-step explanation:

4 0

2 years ago

Laurie is moving a dresser with a mass of 250 kg. She does 126 J of work with a force of 14 N. How far does she move the dresser

grandymaker [24]

The main formula is E = sum Work,
or the work is W= FxAB=E
so AB= E/F = 126/ 14 = 9m

7 0

3 years ago

I keep getting this wrong and I only have one chance to get it right. Please help! It's timed aswell.

allsm [11]

PIC 1 - floor function

PIC 2 - 1,1

PIC 3 - -1,1

PIC 4 - f(x)=[1/2]

PIC 5 - f(x)=1/5

7 0

3 years ago

The ratio of two numbers is 7 to 5 the sum of the numbers is 24 what are the numbers

statuscvo [17]

Answer:

The numbers are 14 and 10

Step-by-step explanation:

Let the numbers be

$x:y=7:5$

This implies that,

$\frac{x}{y}=\frac{7}{5}$

$x=\frac{7}{5}y$

The sum of the numbers is 24.

$x+y=24...(2)$

Put equation (1) in (2)

$\frac{7}{5}y+y=24$

$\frac{12}{5}y=24$

$y=24\times \frac{5}{12}$

$y=10$

$x+10=24$

$x=14$

5 0

3 years ago

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