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goldfiish [28.3K]
3 years ago
15

In recent year a letter to Europe from the United States cost $0.94 to mail. A letter mailed within United States cost $0.44. Na

ncy mailed 5 letters for $3.70 some to Europe and some to the United States. how many letters did she send to Europe
Mathematics
1 answer:
Bogdan [553]3 years ago
5 0
3 letters to US = 3*0.94 = 2.82
2 local letters = 2*0.44 =  0.88 
checking: 2.82+0.88 = 3.70

to get rid out of 0.04 cents you have to multiply it by 5. so total number of letters would be 5.
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Alex787 [66]

here's the solution,

=》volume = l × b × h

where,

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  • h = height

so,

=》

v = 11 \times 20 \times 10

=》

2200

so, volume = 2200 cm³

7 0
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Nana76 [90]
Hi there!
We are given the function - 
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and are told to find the limit of the function. 
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\frac{(n+1)!}{n!-(n+1)!}
Divide by (n + 1)! - 
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Now, we can refine the function - 
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3 0
3 years ago
Paul will pay for his new car in 36 monthly payments. If his car loan is for $19,061, then how much will Paul pay each month? Ro
fomenos

Answer:

$529.47

Step-by-step explanation:

6 0
3 years ago
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HELP PLZ <br> i need help with this math side i just need b,c,d a =4x+2y=16
tino4ka555 [31]

Answer:

Please check the explanatio.

Step-by-step explanation:

Solving Part b)

We know that the slope-intercept form of the equation line is

y=mx+b

where m is the slope and b is the y-intercept

Given the equation

4x+2y=16

Re-writing the equation in the slope-intercept form

4x+2y=16

y=-2x+8

Here, m=-2 and b=8

Thus, the equation in the slope-intercept form will be:

y=-2x+8

Solving Part c)

As you sold two pounds of cheddar cheese.

i.e. y=2

substituting y=2 in the slope-intercept form of the line equation

y=-2x+8

2=-2x+8

Subtract 8 from both sides

-2x+8-8=2-8

-2x=-6

Divide both sides by -2

\frac{-2x}{-2}=\frac{-6}{-2}

x=3

You sold 3 pounds of swiss cheese.

Solving Part d)

y=-2x+8

putting x=2.5 in the equation

y=-2x+8

2=-2\left(2.5\right)+8

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The sides are not equal

<em>FALSE</em>

Thus, x=2.5 does not make any sense in the context of the problem.

6 0
3 years ago
Suppose that P(A) = 0.4 and P(B) is unknown. (a) Is it possible that P(A and B) = 0.5? Explain why or why not. (b) Is it possibl
zhannawk [14.2K]

Answer and explanation:

Given : Suppose that P(A) = 0.4 and P(B) is unknown.

To find :

(a) Is it possible that P(A and B) = 0.5? Explain why or why not.

P(A) = 0.4

So, P(A and B) cannot be 0.5 because maximum value of P(A and B) is the lowest of P(A) and P(B).

The range of P(A and B) is 0 to 0.4.

Therefore, P(A and B) cannot be greater than P(A).

(b) Is it possible that P(A and B) = 0.3? Explain why or why not.

Yes, it is possible as P(A and B) = 0.3 < P(A)=0.4

(c) Is it possible that P(A or B) = 0.5? Explain why or why not.

Its is possible that P(A or B) = 0.05,

As P(A or B) can have a least value equal to highest of P(A) and P(B) and maximum value of P(A or B) is 1.

So, P(A or B) can be any value within the range 0.4 to 1.

(d) Is it possible that P(A or B) = 0.3? Explain why or why not.

P(A or B) cannot be 0.3 as the least value of P(A or B) is 0.4.

5 0
3 years ago
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