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dybincka [34]
3 years ago
12

Please help me I NEED THE ANSWER ASAP I will give BRAINLIEST

Mathematics
1 answer:
deff fn [24]3 years ago
8 0

3) 1 yard is 3 feets so 19 yards

4) 1 lb = 16 oz so 104 oz

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A jar of quarters and dimes contains $20.00. There are 110 coins in all. How many of each are there?
VikaD [51]

Answer:

There are 50 dimes and 110-50 = 60 quarters in the collection.

Step-by-step explanation:

Let D be the number of dimes.

Then the number of quarters is (110-D).

The "value equation" is

10D + 25*(110-D) = 2000.

Simplify and solve for D:

10D + 2750 - 25D = 2000,

-15D = 2000 - 2750,

-15D = -750,

D = %28-750%29%2F%28-15%29 = 50.

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guapka [62]
The formula to find the area of a triangle is

\frac{h_{b}b }{2}

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4x^2+12x-7=0\\\\a=4;\ b=12;\ c=-7\\\Delta=b^2-4ac\\\\\Delta=12^2-4\cdot4\cdot(-7)=144+112=256 \ \textgreater \  0\\\\therefore\\x_1=\dfrac{-b-\sqrt\Delta}{2a}\ and\ x_2=\dfrac{-b+\sqrt\Delta}{2a}\\\\\sqrt\Delta=\sqrt{256}=16\\\\x_1=\dfrac{-12-16}{2\cdot4}=\dfrac{-28}{8}=\boxed{-\dfrac{7}{2}}\\\\x_2=\dfrac{-12+16}{2\cdot4}=\dfrac{4}{8}=\boxed{\dfrac{1}{2}}
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Please answer these questions
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Answer: I don’t know the answer to it but I will try and if I got it will tell u

Step-by-step explanation:

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