All categories

3 years ago

15 points!!

Mathematics

2 answers:

tamaranim1 [39]3 years ago

6 0

Kecia has 12 nickels and 9 dimes.

This is true because...

12 x 5 = 60

9 x 10 = 90

90 + 60 = 150

In other words $1.50

juin [17]3 years ago

6 0

Answer:

Kecia has 9 dimes and 12 nickels.

Step-by-step explanation:

Let x be the number of dimes Kecia has. She has 3 more nickels than dimes, then she has (x+3) nickels.

1 nickel coin is worth 5 cents and 1 dime coin is worth 10 cents. Then (x+3) nickeals are worth $5(x+3)$ cents and x dimes are worth $10x$ cents. The total value of the coins in Kecia's pocket is $1.50 that is 150 cents, then

$5(x+3)+10x=150.$

Solve this equation:

$5x+15+10x=150,\\ \\5x+10x=150-15,\\ \\15x=135,\\ \\x=9.$

Kecia has 9 dimes and 12 nickels.

You might be interested in

2t + 2 = 6 what does T=? please help??? (2 step equations) im not understanding how to do this

otez555 [7]

Answer:

t=2

Step-by-step explanation:

2×2+2=6 a numbee next ti another number means multiply so 2 times 2 makes a 4 and plus anoyher 2 is 6 so t is 2

4 0

4 years ago

Read 2 more answers

The standard deviation of quiz scores is 5.6. Describe the quiz scores

Lyrx [107]

We have been given a table of quiz scores whose standard deviation is 5.6. We are asked to find the test scores that are within one standard deviation of the mean.

First of all, we will find the mean of the test scores using average formula.

$\text{Average}=\frac{\text{Sum of data points}}{\text{Number of data points}}$

$\text{Average}=\frac{25+13+16+30+27+22+19+22+15+28+27+29}{12}$

$\text{Average}=\frac{273}{12}$

$\text{Average}=22.75$

The scores within one standard deviation would be mean plus one SD and mean minus one SD that is:

$22.75-5.6\text{ and } 22.75+5.6$

$17.15\text{ and } 28.35$

Therefore, the quiz scores 17.15 and 28.35 are within one standard deviation of the mean.

7 0

4 years ago

George charged a motorized bicycle on his credit card for $2,000 on June 12. His balance before that purchase on that credit car

Gnesinka [82]

The calculation uses the accumulated daily balance method (ADB).
We assume the statement is based on calendar month (rare!).

George owes $500 from beginning to end of June, so 30 days out of 30.
Interest accrued is 500*0.013*30/30=$6.50.
He also owes $2000 from June 12 to June 30, so 19 days inclusively.
Interest accrued is $2000*.013*(19/30)=16.47
Total interest at the end of the month=$6.50+$16.47=$22.97

3 0

4 years ago

An endpoint and midpoint are given. Find the coordinates of the other endpoint. endpoint: (2,6), midpoint: (5,12)

hammer [34]

Answer:

I got (8, 18) for the other endpoint.

Hopefully this helps!

6 0

3 years ago

Can y’all answer the middle one Ill mark you brainlist.

777dan777 [17]

Answer:

4.44 infinet

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers