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vodka [1.7K]
3 years ago
15

The domestic postage rate for first-class letters weighing 12 oz or less is $0.37 for the first ounce and $0.23 for each additio

nal ounce or part of an ounce. How much will it cost to send a letter that weighs 7.5 oz?
Mathematics
1 answer:
tatyana61 [14]3 years ago
5 0
The letter will cost $1.98.
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He had fourty three more cards left
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I mark brainliest for all my questions that are answered right :) thx for helping me
allsm [11]
The correct answer is y= 0.513(1.833)^x


Explain


We will use the equation on this form

Y=ab^x

Let’s us plug in the coordinates of first point

(X, y) , ( 9, 120)

We will have

Y=ab^x

120= ab^9

Our equation for a will be

Ab^9 = 120

ab ^9 / b^9 = 120/ b^9


a = 120/ b^9

So will have


Y= 120/ b^9 • b^x

Then we will plug in coordinates for the second point


( x,y) = ( 10, 220)

We will have

Y= 120/b^9 • b^x

220 = 120/b^9 • b^10-9


220= 120b

Divide both side by 120

B= 11/6

B= 1.833333 = 1.833



Let’s plug in the value b=11/6 to our equation for a


A= 120/b^9

A= 120/ 11/6^9

A= 120/11^9/6^9


A=120 • 6^9 / 11^9

= 0.51285 which equal to 0.513



So therefore the answer is

Y= 0.513(1.833)^x


I hope this help you

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8 0
3 years ago
Ƒ(x) = x2 + 2x − 15 to find the solution when ƒ(x) = 0.
lozanna [386]

Answer:

f = 2 + -15x-1 + x

Step-by-step explanation:

Simplifying

f(x) = x2 + 2x + -15

Multiply f (x)

fx = x2 + 2x + -15

Reorder the terms:

fx = -15 + 2x + x2

Solving

fx = -15 + 2x + x2

Solving for variable 'f'.

Move all terms containing f to the left, all other terms to the right.

Divide each side by 'x'.

f = -15x-1 + 2 + x

Simplifying

f = -15x-1 + 2 + x

Reorder the terms:

f = 2 + -15x-1 + x

3 0
3 years ago
Read 2 more answers
How much time will it take for a bug to travel 5 meters if it is traveling 1 m/s
Sophie [7]

Answer:

5

Step-by-step explanation:

divide the distance by the rate of speed

5/1=5

7 0
3 years ago
Read 2 more answers
Answer choices <br> -4.8cm^2<br><br> -52cm^2<br><br> -12cm^2<br><br> -26cm^2
Setler [38]

Answer:

-52cm 2

Step-by-step explanation:

i am positive

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