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Natasha2012 [34]
2 years ago
12

Find the grade Juniper Would have to make on his fifth test if after four tests he has an average of 90,  and he must have a 9

2.5 in order to get a new four wheeler. 
Mathematics
1 answer:
Rzqust [24]2 years ago
3 0

Answer:102.5

Step-by-step explanation:

The first four tests are 2.5 short of the desired average.  

2.5 x 4 = 10

The fifth test must be 92.5 + 10 points more to make up for the other tests being lower.  

102.5

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Carl collects coins compulsively, but he only likes quarters and dimes. Carl currently has 125 coins for a total of $26.00. How
faust18 [17]

We need to find the two equations that represents the total amount of coins Carl has that makes $26.00 and the number of quarters and dimes.

Carl has 35 dimes and 90 quarters. The equations are 0.1x+0.25y=26 and x+y=125.

Let the number of dimes be x

Let the number of quarters be y

The total number of coins is 125

So, the first equation will be

x+y=125

The value of the coins is $26. So,

0.1x+0.25y=26

Let us solve the equations

x=125-y

0.1\times (125-y)+0.25y=26\\\Rightarrow 12.5-0.1y+0.25y=26\\\Rightarrow 0.15y=13.5\\\Rightarrow y=\dfrac{13.5}{0.15}\\\Rightarrow y=90

x+y=125\\\Rightarrow x=125-90\\\Rightarrow x=35

The number of dimes is 35 and the number of quarters is 90.

Learn more:

brainly.com/question/14180120

brainly.com/question/20397165

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3 years ago
Olivia was pocking up some of her old stuff into a box. A box can hold 8
Citrus2011 [14]

Answer:

Step-by-step explanation:

2 easy ways:

1. Divide 7 by 3 then multiply by 2

7/3= seven thirds or 2.333

Now multiply by two to get 14 thirds

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2. Multiply 7 by 2/3, or 0.666

This way is a lot easier with a

calculator

The weight of the box is 14/3’s or 4.666

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3 years ago
If 45 mL of H2O are required to mix 100 g of casting plaster, how many milliliters would you need for 250 g of plaster ?
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Answer is 112.5 mL

You add 45 and another 45 to get 90 mL for 200g, and divide 45 by 2 to get 22.5 for the 50g left and you add all up 90+22.5=112.5
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True because point B is the interior
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3 years ago
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Monica baked several dozens of cookies. If the recipe for one dozen calls for 3 1/3 cup of flour. How much flour would Monica ne
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You would have to multiply 3 1/3 and 4 and that is 13.33...
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3 years ago
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