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balandron [24]
3 years ago
6

15x+5y=10 5x-7y=12solve using elimination ​

Mathematics
1 answer:
Paul [167]3 years ago
8 0
Point form: (1,-1)
equation form: x = 1, y = -1
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What is the fewest number of quarters, nickels, and pennies that can be fairly exchanged for 2 quarters, 6 nickels, and 9 pennie
adoni [48]

Answer:

Your answer is 3 quarters, 2 nickels, and 4 pennies

Step-by-step explanation:

2 quarters plus 6 nickels plus 9 pennies is equal to 89 cents. So if we subtract 75(3 quarters) we get 14 which is less than 25 therefore we must only use nickels and pennies from now on. If we take 14 and subtract 10(2 nickels) we get 4 which less than 5 leaving us only to use pennies, which one a piece so it must be 4 pennies. Hope this helps!

4 0
3 years ago
Complete the following statement: f(3)=_____
victus00 [196]
Using this equation, f(3) = 23.

In order to find the value of f(3), we need to take the f(x) equation and put 3 everywhere we see x. Then we follow the order of operations to solve. So, let's start with the original. 

f(x) = 2x^2 + 5sqrt(x - 2) 

Now place 3 in for each x. 

f(3) = 2(3)^2 + 5sqrt(3 - 2)

Now square the 3.

f(3) = 2(9) + 5 sqrt(3 - 2)

Do the subtraction inside of the parenthesis. 

f(3) = 2(9) + 5sqrt(1)

Take the square root

f(3) = 2(9) + 5(1)

Multiply. 

f(3) = 18 + 5

And add. 

f(3) = 23

4 0
3 years ago
Marcus is selling lemonade and peanuts. Each cup of lemonade cost $0.75, and each bag of peanuts costs $0.35. On Saturday, Marcu
andreev551 [17]
Marcus sold 8 cups of lemonade and 3 bags of peanuts. 0.75 times 8 equals $6.00. 0.35 times 3 equals $1.05. $6.00+ $1.05= $7.05. Your welcome dude

7 0
3 years ago
What is the estimated number to 204878
noname [10]
I think you want a rounded answer. The answer would be 200,000

4 0
3 years ago
A student completed 1/4 of a work book in 3/5 hour. He plabs to work for 1 more hour at the same rate. What fraction of thebwork
kifflom [539]

Answer

workbook =x

1/4   3/5

x    5/5 (1 hour)

then x=(5/5 * 1/4):3/5

x= 5/20 * 5/3  

x=1/4 *5/3

x= 5/12

5 0
4 years ago
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