please help me answer this

Answer:

D

Step-by-step explanation:

9(3)^-4

3^2 × (3^-4)

in algebraic expression a^n × a^m = a^n+m

3^2+(-4)

3^-2

but 3^-2 = 1/3²

1/3²= 1/9

The option (4) is correct i.e., when [tex]x=-4[/tex] then

[tex]f(x) = 9(3)^x\\\\f(x)=\frac{1}{9}[/tex]

What is the equation?

The definition of an equation is a mathematical statement that shows that two mathematical expressions are equal.

Here given equation is

[tex]f(x)=9(3)^x\\\\\\x=-4\\\\\\f(-4)=9(3)^{-4}\\\\f(-4)=\frac{9}{(3)^4}\\\\f(-4)=\frac{9}{81}\\\\f(-4)=\frac{1}{9}[/tex]

Hence, the option (4) is correct i.e., when [tex]x=-4[/tex] then

[tex]f(x) = 9(3)^x\\\\f(x)=\frac{1}{9}[/tex]

To know more about the equation

https://brainly.com/question/12788590

#SPJ2

Answer:

$19.53

Step-by-step explanation:

$20 - 0.1(20) = 20 - 2 = 18

18 + 0.085(18) = 18 + 1.53 = 19.53

Answer:

[tex]f(x) = {x}^{2} + 4x - 1 \\ f( - 1) = {( - 1)}^{2} + 4( - 1) - 1 \\ = - 4 \\ { \boxed{f( - 1) = - 4}} \\ \\ f(1) = {(1)}^{2} + 4(1) - 1 \\ = 4 \\ { \boxed{f(1) = 4}}[/tex]

Answer:

Step-by-step explanation:

see image

Answer:

hello u so cool i admire you <3

Answer:

it is Three hundred and sixteen thousand,seven hundred and fifty eight.

Hey there!

316,758

3 is in the HUNDRED THOUSANDS place

1 is in the TEN THOUSANDS place

6 is in the THOUSANDS place

7 is in the HUNDREDS place

5 is in the TENS place

8 is in the ONES place

Expanded form

300,000 + 10,000 + 6,000 + 700 + 50 + 8

Answer:

Three hundred sixteen thousand seven hundred fifty-eight

Good luck on your assignment and enjoy your day!

~Amphitrite1040:)

Answer:

You know what :)

Step-by-step explanation:

I feel bad so if you ever need help you can ask me! :)

Answer:

hi yaar, mai hu indian

nice too meet you

my name Ankit kumar

any doubt

Answer:

C

Step-by-step explanation:

Answer:

easy it is B trust me

Step-by-step explanation:

Answer:

h(t) = -0.25t + 6.25

Step-by-step explanation:

Given that :

Height of candle after burning for 1 hour = 6

Height of candle after burning for 3 hours = 5.5

The linear model to show the height ight of candle after burning for h hours :

The height change per hour of burn ; this is the slope ;

Change in height / Change in time ;

Time = 1 hour ; height = 6

Time = 3 hours ; height = 5.5

Slope = (5.5 - 6) / (3 - 1) = - 0.5 / 2 = - 0.25

This means candle height decreases ; - 0.25 ft per hour :

Based on the linear, slope, intercept equation ;

y = mx + c

Candle height, h

h(t) = mt + c

c = intercept, we can obtain this thus ;

Using the height at 1 hour and slope;

After an hour burn :

6 = - 0.25t + c

t = 1

6 = - 0.25(1) + c

6 = - 0.25+c

6+0.25 =, c

c = 6.25

Hence ; to calculate height, h after burn time &

h(t) = -0.25t + 6.25

Answer:

Step-by-step explanation:

1) y = -2/3* -6 + 7 =

y= 11

2) 5 = -2/3 x + 7

-2/3 x = -2

x = 3

3) y = -2/3 * 15 + 7

y = -3

4) 15 = -2/3x + 7

2/3x = -8

x = -12

Applying the division of functions f(x) and g(x), it is found that the quotient and the domain are given, respectively, by:

3) 2x + 3; domain is the set of all real numbers except 1​.

It is the set that contains all possible input values.

In this problem, the functions are given as follows:

Hence the division is given by:

[tex]\frac{f(x)}{g(x)} = \frac{2x^2 + x - 3}{x - 1}[/tex]

The denominator cannot be zero, hence the domain is [tex]x \neq 1[/tex].

Considering that 2x² + x - 3 = (2x + 3)(x - 1), the function can be simplified as 2x + 3, hence option 3 is correct.

More can be learned about the domain of a function at https://brainly.com/question/10891721

#SPJ1

Answer:

39229.25

Step-by-step explanation:

Answer:

39229.25

Step-by-step explanation:

Calculator

Answer:

There is no slope.

Step-by-step explanation:

Following the formula for slope,

y^2 - y^1

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

x^2 - x^1

when inputting our values, we get -13/0. We cannot divide by 0 and because the 0 is in the denominator, it means that there is no slope.

Answer:

53/6  = 8.83

Step-by-step explanation:

2 x -7 = -14

-62 / 12 = -5.16667

-5.16667 - (-14) = 8.83333

Final answer: 8.83

I hope this helps you! :D

Answer:

use pamdas

Step-by-step explanation:

the answer I got using pemdas was 8.83

Answer:

Hello! answer:

largest volume: Rectangle C

smallest volume: Rectangle A

Step-by-step explanation:

Rectangle A: 120

Rectangle B: 160

Rectangle C: 224

Rectangle D: 189

Hope that helps!

Step-by-step explanation:

x+2y=-4

2x+3y=1

The difference between this two equations is x+y so:

x+y

=1-(-4)

=1+4

=5

I'm not sure what the question is asking to find, but I have already helped you find the value of x+y, good luck with the rest I guess :))

8 students out of 27

the total of students is 27 out of the 27 students 19 dont play and instrument and a sport

Answer:

[tex]{ \boxed{ \tt{4x + 4x \: → \: 8x}}} \\ \\ { \boxed{ \tt{3x + 5x + 8 \:→ \: 8x + 8 }}} \\ \\ { \boxed{ \tt{ - 7x + 4 + 3x \: → \: - 4x + 4}}} \\ \\ { \boxed{ \tt{4x + 4x + 4x + 4x \: → \: 16x}}}[/tex]

Answer:

4x + 4x → 8x

3x + 5x + 8 → 8x + 8

-7x + 4 + 3x → -4x + 4

4x + 4x + 4x + 4x → 16x

Step-by-step explanation:

The left side consists of a series of expressions and the right side is the list of choices to match to. This is simple math if you already know how to combine like terms. Combining like terms is combining numbers that represent the same value. Take a look at 4x + 4x for example, 4x and 4x are two numbers with the same value. Not that they both have the number 4, but that they have the same special variable. If there are two or more numbers with the same variable like x for example, combine the two, meaning you add the numbers. Just don't add the variables because clearly, the variable is an unknown number so you can't add variables. Instead, you can apply the same variable to the sum of two or more numbers. So 4x + 4x equals 8x. Do the same process again to the other 3 expressions. Also, you can't add a number with a variable to a number alone. They don't represent the same value.

3x and 5x are the same value so combine them. Now you only have 8x + 8 left as the simplified version of the expression.

-7x and 3x are the same value so combine them. Don't forget that the 7 is negative. Use a calculator if needed. Now you only have -4x + 4 as the simplified version of the expression.

Similar to 4x + 4x in the first expression, just add all of the numbers up. There isn't a number alone in this expression. 16x should be your final answer.

I hope this helps! Let me know if I am wrong. :D

Answer:

8/168=21

Step-by-step explanation:

Answer:

I think it's A, because all triangles have 3 vertices.

Step-by-step explanation:

Answer:

Hình tròn lớn và hình tròn nhỏ có cùng tâm O. Tính diện tích hình tròn lớn, biết rằng diện tích hình tròn nhỏ là 12,56m2.

Step-by-step explanation:

Hình tròn lớn và hình tròn nhỏ có cùng tâm O. Tính diện tích hình tròn lớn, biết rằng diện tích hình tròn nhỏ là 12,56m2.