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adoni [48]
3 years ago
5

Marie has 11 coins, all of which are quarters and nickels. In all, they're worth $1.15. How many of each kind of coin does Marie

have?
Mathematics
1 answer:
pickupchik [31]3 years ago
3 0

Answer:

Step-by-step explanation:

x + y = 11

.25x + .05y = 1.15

25x + 5y = 115

-25x - 25y = -275

-20y = -160

y = 8 nickels

x + 8= 11

x = 3 quarters

3 quarters and 8 nickels

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The radius is 5 Given that the measurement is in centimeters, find the area of the circle to the nearest tenth. (Use 3.14
Vsevolod [243]

Answer:

A = 78.5 cm^2

Step-by-step explanation:

The area of a circle is given by

A = pi r^2

We know r =5 and pi = 3.14

A = 3.14 (5^2)

A = 3.14 (25)

A = 78.5 cm^2

6 0
3 years ago
A car is purchased for $16,000. After each year, the resale value decreases by 20%. What will the resale value be after 3 years?
ozzi

Answer: (I REDID THIS ANSWER)

$128

Step-by-step explanation:

20% off of $16,000 = $3,200

20% off of $3,200 = $640

20% off of $640 = $128

Answer= $128

3 0
3 years ago
Age of Peter + age of Pol = 39
GalinKa [24]

Answer:

PETER 18

POL 21

MARY 26

Step-by-step explanation:

I dont know if I did in the right way...

1st: Take any number for peter's or pol's age

I took 18 for peter, RANDOMLY

2nd: Subtract the age from the total to get pol's age

39-18=21 Hence, pols age is 21

3rd: Subtract peter's age from the total to get marys age

47-18=26 Hence, Marys age is 26

4th: Add the age of pol and mary

aaand, you get 47

Done!

Hope it helps!!!

6 0
3 years ago
Read 2 more answers
(x+2)(x-3)<br><br> (x+2)(x-3)
gregori [183]

Answer:

x² - x - 6

Step-by-step explanation:

Given

(x + 2)(x - 3)

Each term in the second factor is multiplied by each term in the first factor, that is

x(x - 3) + 2(x - 3) ← distribute parenthesis

= x² - 3x + 2x - 6 ← collect like terms

= x² - x - 6

6 0
3 years ago
Read 2 more answers
Clayton opens a savings account with 11 dollars he got from his grandmother
crimeas [40]

Answer:

The answer is "$3640.58"

Step-by-step explanation:

This question is incomplete, that's why we add another question in the attached file. Please find it.

P = \$ \ 1300 and effective per year is = interest rate per year = 7.2  

Total  \$ \ 1300 due after 8 years is P+PRT:

\to 1300(1+0.072 \times 8)\\\\\to 1300(1+ 0.576)\\\\\to 1300(1.576)\\\\\to \$ \ 2048.8

\to Total \ X  = \$ \ (7000-2048.8) \\\\

= \$ \ 4951.2 \\\\= X(1 +0.072 \times 5)\\\\=1.36 X  \\\\

The number of dollars is X = \frac{4951.2}{1.36} = \$ \ 3640.58

3 0
3 years ago
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