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3 years ago

Can someone explain to me I’m confused

Mathematics

2 answers:

djverab [1.8K]3 years ago

7 0

You basically have to plug in the numbers in the x Column into the equation 3x+5

Ex:
3x+5
Replace x variable with one of the numbers in column x
3(1)+5=8

QveST [7]3 years ago

4 0

Answer:

Step-by-step explanation:

Here you have the function f(x) = 3x + 5 and are being asked to 'evaluate' it at x = {-1,0, 2, 4}.

Arbitrarily starting out with x = 0, we get f(0) = 3(0) + 5 = 5

Next,

f(-1) = 3(-1) + 5 = 2

f(2) = 3(2) + 5 = 11

and, finally, f(4) = 3(4) + 5 = 17

so the right hand column for this function (which are function values) is

and in set format this is {2, 5, 11, 17}

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I need help on all of em

USPshnik [31]

They're all similar. Problem one you need to think how can I eliminate one of the variables to solve for the other one. Think muliplication in your head when doing this but as same time look for a way to subtract the variable you are eliminatiing should equal 0 then you solve the varialbe by itself. After you find one variables solution you need to substitute that solution into the variables place from one of the two original equations. I would think multiplying the -2y by 3 and 3y by 2. Notice one has a negative and other is positive so when I add the two equations I'll get 0y. However do not forget to multiply both equations by the multiplied number you used to each term in the equation. you should get 35x = 35 then x=1. Now you need to find y by substituting the 1 for either x-value in the two equations such as 4(1) + 3y = -5 now just solve for y and you get y = -3. your answer should be (1, -3). Notice you can always check and verify your right by substituting your values found into both solutions to get 15 = 15 and -5 = -5.

7 0

3 years ago

find the diameter of a cylinderical log of wood if needs 132m long rope to tie around at three different places

Arada [10]

Answer:

circumference = 132/3= 44m

2π r = 44

2r = diameter = 44/π = 14 m

5 0

3 years ago

F i n d space t h e space s l o p e space g i v e n space t o space p o i n t s. space space m space equals space fraction numer

gulaghasi [49]

Answer:

The correct option is 3.

Step-by-step explanation:

If a line passes through to points $(x_1,y_1)$ and $(y_1,y_2)$ , then the slope of line is

$m=\frac{y_2-y_1}{x_2-x_1}$

Given points are (4,-7) and (6,3).

The slope between given points is

$m=\frac{3-(-7)}{6-4}$

$m=\frac{3+7}{2}$

On further simplification we get

$m=\frac{10}{2}$

$m=5$

Therefore the correct option is 3.

6 0

3 years ago

Jackson purchases a new car for $48,000. The car's value can be modeled by the

vekshin1

We have been given that Jackson purchases a new car for $48,000. The car's value can be modeled by the following exponential function: $y = 48000(0.76)^t$ where y represents the car's value and t represents time in years. We are asked to find the decay rate as a percentage.

We know that an exponential decay function is in form $y=a\cdot (1-r)^x$ , where,

y = Final value,

a = Initial value,

r = Decay rate in decimal form,

x = time.

Upon comparing our given function $y = 48000(0.76)^t$ with standard decay function $y=a\cdot (1-r)^x$ , we can see that $1-r=0.76$ .

Let us solve for r.

$1-1-r=0.76-1$

$-r=-0.24$

$r=0.24$

Let us convert 0.24 into percentage.

$0.24\times 100\%=24\%$

Therefore, the decay rate is 24%.

8 0

3 years ago

A certain bacterial culture is multiplying in a culture dish, doubling in size every 6 minutes. It takes exactly an hour to fill

Furkat [3]

Doubling in size,

if the whole dish is filled in an hour (all of it)
how long does it take to fill 1/2 dish?

notice that
1/2 doubled=1/2 times 2=2/2=1 whole dish
therefor it only doubled one more time from the 1/2 point

1hour=all
1hour-6mins=1/2 dish

1hour-6mins=60-6=54 minutes

answer is 54 minutes

4 0

3 years ago