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Svetllana [295]
3 years ago
12

Giuliana has 22 quarters and dollar coins worth a total of $10.75.Which equation can be used to find d, the number of dollar coi

ns Giuliana has?
Mathematics
2 answers:
Ganezh [65]3 years ago
7 0
0.25(22 - d)+d=10.75
Burka [1]3 years ago
4 0

Answer:

(22-d)× 0.25  + d = 10.75 equation that can be used to find d, the number of dollar coins Giuliana has.

Step-by-step explanation:

Given :  Giuliana has 22 quarters and dollar coins worth a total of $10.75

We have to find an equation that can be used to find d, the number of dollar coins Giuliana has.

Let he has d dollar coins then number of quarter coins is (22-d)

We know 1 quarter = 0.25 dollars

then (22-d) quarter = (22-d)× 0.25 dollars =  $5.5 - 0.25d

Thus,

The equation becomes,

(22-d)× 0.25  + d = 10.75.

That is  $5.5 - 0.25d + $d = $ 10.75.

thus, 0.75d = $ 10.75 - $5.5

On solving d = 7

Thus,  (22-d)× 0.25  + d = 10.75 equation that can be used to find d, the number of dollar coins Giuliana has.

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Savatey [412]

we are given

y=19.75x

Here,

y is the number of gallons of water in the pool

x is the number of minutes the truck has been filing the pool

now, we will verify each options

option-A:

When x=1

then y=19.75

so, for 1 minute , number gallons =19.75

so, this is FALSE

option-B:

Since, we have

y=19.75x

It is similar to equation of line

y=mx+b

But b=0

It means that it passes through origin

so, this is TRUE

option-C:

y=19.75x

we can compare it with

y=mx

where m is the rate

so, we get

m=19.75

while we are given

the water in swimming pool increase about 100 gallons by every 5 minutes

so, we get rate as

m=\frac{100}{5} =20 gallons per minute

this is close to 19.75

so, they are approximately equal

so, this is TRUE

option-d:

x-value and y-value will show relationship

and ratio will always be constant or equivalent

because it has linear relationship

so, this is TRUE

option-e:

We need to check

(8,150) ..so, x=8 and y=150

we can plug this in our equation

and we get

150=19.75\times 8

150=158

Since, left side is not equal to right side

so, this can not be point

so, this is FALSE


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Answer:

The answer to your question is: P(A) = 0.47

Step-by-step explanation:

Data

7 red flowers

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Probability  that he select a red one

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