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2 years ago

Question 29 of 40 Find f(-2) for f(x) = 5.3*.

Mathematics

1 answer:

blsea [12.9K]2 years ago

4 0

Answer:

A. $\frac{5}{9}$

Step-by-step explanation:

To find f(-2) in f(x)=5*3^x, plug in -2 into all the x values.

f(-2)=5*3^-2, you can use calculator to calculate 3^-2 which equals 0.1, forever 1's.

f(-2)=5*0.1=0.5 Forever 5's.

f(-2)=0.5 or $\frac{5}{9}$

Hope this helps!

If not, I am sorry.

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3 years ago

x - y = 3 x + y = 5 Which of the following systems is equivalent to the given system? 2x - y = 18 and x + 2y = 10 4x - 3y = 18 a

tiny-mole [99]

Answer:

None of the systems is equivalent to the given system

Step-by-step explanation:

we have the given system

$x-y=3$ ---> equation A

$x+y=5$ ---> equation B

Solve the system

Adds equation A and equation B

$x-y=3\\x+y=5\\------\\ 2x=8\\x=4$

Find the value of y

$(4)-y=3$ ------> $y=4-3=1$

The solution of the given system is the point (4,1)

we know that

If a system is equivalent to the given system, then the solution of both systems must be the same

Verify each case

case A) 2x - y = 18 and x + 2y = 10

$2x-y=18$ ---> equation A

$x+2y=10$ ---> equation B

Substitute the value of x and y in both equations and then compare the results

$x=4,y=1$

equation A

$2(4)-(1)=18$

$7=18$ ----> is not true

therefore

the system is not equivalent to the given system

case B) 4x - 3y = 18 and x + 2y = 10

$4x-3y=18$ ---> equation A

$x+2y=10$ ---> equation B

Substitute the value of x and y in both equations and then compare the results

$x=4,y=1$

equation A

$4(4)-3(1)=18$

$13=18$ ----> is not true

therefore

the system is not equivalent to the given system

case C) 2x - 3y = 3 and x + 2y = 5

$2x-3y=3$ ---> equation A

$x+2y=5$ ---> equation B

Substitute the value of x and y in both equations and then compare the results

$x=4,y=1$

equation A

$2(4)-3(1)=18$

$5=18$ ----> is not true

therefore

the system is not equivalent to the given system

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rewona [7]

Answer:

A would be the answer.

Step-by-step explanation:

If there are 25 cupcakes in the beggining, and then c were given away, the expression would look like the following:

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Hope I helped! God bless you :-)

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