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Minchanka [31]
3 years ago
11

PLease somebody help me

Mathematics
2 answers:
Furkat [3]3 years ago
6 0

Answer:

y = 0.35x

Step-by-step explanation:

Jane:

Cost of 3 postcards= $1.05

Cost of 1 post card = 1.05 ÷ 3

                              = $ 0.35

Rosi:

Cost of 5 postcards= $1.75

Cost of 1 post card = 1.75 ÷ 5

                              = $ 0.35

Tanya:

Cost of 8 postcards= $2.80

Cost of 1 post card = 2.80 ÷ 8

                              = $ 0.35

As unit rate is same, Cost and number of postcards are in proportion.

Cost of cards = 0.35 * number of cards

y = 0.35*x

y = 0.35x

irga5000 [103]3 years ago
5 0

Answer:

Yes they ae all proportional

Equation: x*0.35=y

Step-by-step explanation:

Find the unit rate for all and compare

1.05/3=0.35

1.75/5=0.35

2.8/8=0.35

Since they are all equal, there proportional

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3 years ago
Karla and Isamar are disagreeing over which way the graph of the function ????(x) = |x + 3| is translated relative to
____ [38]

Answer:

Isamar

Step-by-step explanation:

We are given that a function

g(x)=\mid {x+3}\mid is a translation of the graph

f(x)=\mid x \mid

Karla believes that the graph of g is '' to the right '' of the graph of f.

Isamar believes that the graph of g is ''to the left'' of the graph f.

When we draw a graph then we can see that

The coordinates of vertex of f  are (0,0).

The coordinates of vertex of g(x) are (-3,0).

When x shift 3 units towards left then we get g(x)

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5 0
3 years ago
On a piece of paper , graph f(x)=2^x then determine which answer choice matches the graph you drew.
amid [387]

Answer:

The graph in the attached figure

Step-by-step explanation:

we have

f(x)=2^x

This is a exponential function of the form

y=a(b^x)

where

a is the initial value or the y-intercept

b is the base of the exponential function

If b>1 then is a exponential growth function

If b<1 then is a exponential decay function

In this problem

The y-intercept is equal to

For x=0

f(x)=2^0=1

The y-intercept is the point (0,1)

so

a=1

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The value of b is greater than 1

so

Is a growth function

To plot the graph create a table with different values of x and y

For x=-1

f(x)=2^-1=0.5

point (-1,0.5)

For x=1

f(x)=2^1=2

point (1,2)

For x=2

f(x)=2^2=4

point (2,4)

For x=3

f(x)=2^3=8

point (3,8)

For x=4

f(x)=2^4=16

point (4,16)

Plot the y-intercept and the other points and connect them to graph the exponential function

Note that as x increases the value of y increases (exponential growth function)

The graph in the attached figure

4 0
4 years ago
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Answer: 106.63 feet

Step-by-step explanation: how this helps :)

8 0
2 years ago
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ra1l [238]

Answer:

It would be (-2, -3)

Step-by-step explanation:

The reflection over the x axis makes the y value negative

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3 0
3 years ago
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