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VikaD [51]
3 years ago
11

The price of one gallon of milk has increased from $3.24 to $4.05. What is the percentage increase?

Mathematics
2 answers:
Alisiya [41]3 years ago
5 0
Let initial price be = x = 3.24
final price = y = 4.05
Difference = 4.05 - 3.24
= 0.81
Percentage increase = 0.81 / 3.25 × 100
= 25 %
Vedmedyk [2.9K]3 years ago
3 0
(4.05 - 3.24) / 3.24......x 100
0.81 / 3.24...x 100
0.25.....x 100
25% increase <==
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She is saving $24!
explanation: multiply .2 (20%) by 120.
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7 0
2 years ago
Abby filled her goodie bags with 4 cookies and 3 candy bars and spent a total of $10.25 per bag. Marissa filled her goodie bags
Paladinen [302]
Let's start by writing a system of linear equations:
c -> cookies 
cb -> candy bars
(You can use any abbreviations to your preference)

Abby:
4 cookies 
3 candy bars
$10.25 per bag
The equation would be:
4c+ 3cb = $10.25

Marissa:
2 cookies
7 candy bars
$14.75 per bag
The equation would be:
2c + 7cb = $14.75

So our linear equation system would be:
<span>4c+ 3cb = $10.25
</span><span>2c + 7cb = $14.75

I would try to get rid of one variable so I can solve for the other variable. In this case, it is easier to get rid of c since I can multiply the second equations by 2. Then it would subtract the two equations.

(2c + 7cb = $14.75) 2 = 4c + 14 cb = $29.50

      4c + 3cb = $10.25
   -  4c+14 cb = $29.50                    (4c would get canceled.)
---------------------------------
             -11 cb = - $19.25                (Divide by -11 to solve for cb)
</span>             ---------   -------------
              -11           -11
            
             cb = $1.75

Now we know cb (candy bar) cost, we would substitute this value into cb into one of the equations. It doesn't matter which equation you put it in. I will substitute it in the first equations. 

  4c + 3 (1.75) = $10.25
  4c + 5.25 = $10.25                       (Multiply 3 by 1.75)
       -5.25       -5.25                         (Subtract 5.25 on both sides)
             4c = 5                                 (Divide by 4 on both sides to get c)
             ----   ---
              4      4
         
         c= 1.25

Check the work:
4(1.25) + 3(1.75) 
  = $10.25

2(1.25) + 7(1.75)
   = $14.75

Total cost:
cookies = $1.25
candy bars = $ 1.75

Hope this helps! :)

6 0
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A grocery store advertises that 15 cups of granola cost $6.75. Which are equivalent prices
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which of what are equivilent prices?

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Move the slider on the graph on the right to graph each function:
DedPeter [7]

Answer:

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The range is y\geq 1

Step-by-step explanation:

we have

y=\sqrt{x-7} +1

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Remember that

The domain of a function is the set of all possible values of x

we know that the radicand of the function must be greater than or equal to zero

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Remember that

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y=\sqrt{7-7} +1=1

so

The solution for y is the interval [1,∞)

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