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Art [367]
3 years ago
14

Find the value f(t)=2(0.4)^t f(-2)=?

Mathematics
1 answer:
Nuetrik [128]3 years ago
4 0

f(t) = 2(0.4)^t

F(-2) means to replace t with -2:

f(-2) = 2(0.4)^-2

f(-2) = 12.5

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Find the square: (5x - 4y)2 <br><br> (and please put the process of solving the equation)
satela [25.4K]
(5x-4y)^2
(5x-4y)(5x-4y)

Multiply each term in one bracket in turn by the terms in the other bracket

(5x)(5x) = 25x^2
(5x)(-4y)=-20xy
(-4y)(5x)=-20xy
(-4y)(-4y)=16y^2

Put them together we have
25x^2-20xy-20xy-16y^2
25x^2-40xy-16y^2
7 0
3 years ago
The shelf is made of 3 pieces of wood, each 0.3 meter wide. There is also 0.05 meter of space between the shelf and the wall on
lutik1710 [3]
Since there are 2 sides to the shelf, there is 0.05*2=0.05+0.05=0.1 meters of space between the shelf and wall in total. Next, since each piece of wood is 0.3 meters wide and we have 3 of them, the total width of the wood is 0.3+0.3+<something>
Note that <width of wood>+<space between shelf and well> =width of closet
I challenge you to finish this on your own - good luck, and feel free to ask with any further questions! 

8 0
4 years ago
X=17-4y<br> y=x-2<br> answer by substitution
sashaice [31]

Answer:

x=5,y=3

Step-by-step explanation:

the first step is to decide whether you want to substitute y and find x, or substitute x and find y.

(it doesn't matter which way you will choose.If you do the math correctly you will get the correct answer,one way or another).

for example, let's substitute y into the first equation:

x=17-4*(x-2)

so now,we will organize the equation:

x+4x=17+8

5x=25/(÷5)

x=5

now we will substitute x with 5 in the second equation(or the first one,it doesn't matter)in order to find y:

y=5-2

y=3

3 0
4 years ago
Assume that f(1000)=50 , and it's also true that the cost to the consumer of each item is $5, did the retailer make wise use of
andriy [413]
I would say that they didnt because if you plug anythin in that equation it wont be a solution......i think thats what it meant

4 0
4 years ago
I dont know how to do this please help and also please explain, thank you:)​
saveliy_v [14]

Answer:

A

Step-by-step explanation:

it's A lol

.................................

8 0
3 years ago
Read 2 more answers
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