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4 years ago

12

At the end of the day a cashier counted 140 quarters and nickels in the register.the coins total 19 dollars.how many coins of ea

ch kind was there in the register?

1 answer:

GarryVolchara [31]4 years ago

4 0

Answer:

80 nickles and 60 quarters

Step-by-step explanation:

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3x+2y=11<br> y=5x-1<br><br> SUBSTITUTION <br><br> WORTH 10 POINTS

cupoosta [38]

X=1 and y=4. first I did
3x+2y=11
y=5x-1
and 3x+2(5x-1)=11
=3x+10x-2=11
=13x-2=11
cancel 2 out
13x=13
x=1. then simply add x in the original y equation,
y=5x-1
y=5(1)-1
y=5-1
y=4.
check your work
3(1)+2(4)=11
4=5(1)-1
again X=1 AND Y=4
Hope this helped

5 0

3 years ago

The sequence below shows a certain company's expected net worth, in millions of dollars, after 1, 2, 3, and 4 years and so on).

adelina 88 [10]

Answer:

I have no clue, what this means lol

Step-by-step explanation:

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3 years ago

20/60+15/60=35/60><br> What dose it equal

stepladder [879]

Answer:

$\dfrac{7}{12}$

Step-by-step explanation:

1. Find the Greatest Common Factor of the numerator and denominator.

The prime factors of 35 are <u>5</u>, 7, 35

The prime factors of 60 are 2, 3, 4, <u>5</u>, 6, 10, 12, 15, 20, 30, 60

The only common factor of 35 and 60 is 5.

2. Divide the numerator and denominator by the Greatest Common Factor.

$\dfrac{35}{60} = \mathbf{\dfrac{7}{12}}$

8 0

4 years ago

The? half-life of a radioactive substance is 20 years. If you start with some amount of this? substance, what fraction will rema

yarga [219]

$\bf \textit{Amount for Exponential Decay using Half-Life} \\\\ A=P\left( \frac{1}{2} \right)^{\frac{t}{h}}\qquad \begin{cases} A=\textit{accumulated amount}\\ P=\textit{initial amount}\\ t=\textit{elapsed time}\dotfill &120\\ h=\textit{half-life}\dotfill &20 \end{cases} \\\\\\ A=P\left( \frac{1}{2} \right)^{\frac{120}{20}}\implies A=P\left( \frac{1}{2} \right)^6\implies A=P\left( \cfrac{1^6}{2^6} \right)\implies A=\cfrac{1}{64}P$

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4 years ago

I have a square piece of paper.

Doss [256]

Answer:

Rectangle A = 6 x 6 = 36cm

Rectangle B = 3 x 3 = 9cm

Rectangle C = 1.5 x 1.5 = 2.25cm

Step-by-step explanation:

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7 0

3 years ago