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r-ruslan [8.4K]
3 years ago
5

Emily has 8 coins in her purse totaling 50 cents. The only kinds of coins she has are nickels and dimes. How many nickels does E

mily have?
Mathematics
2 answers:
kirill115 [55]3 years ago
7 0

Answer:

6 Nickels 2 Dimes

Step-by-step explanation:

5*6=30

2*10=20

+-----------------------

50! theres your answer

makvit [3.9K]3 years ago
3 0
5x + 10y = 50
x + y = 8

x = 8 - y
5*(8-y) + 10y = 50
40 - 5y + 10y = 50
10y - 5y = 50 - 40
5y = 10
y = 2

x + y = 8
x + 2 = 8
x = 8 - 2
x = 6

She has 6 nickels and 2 dimes
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weeeeeb [17]
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f(x) = x²+ 10x - 5
f(3) = (3)² + 10(3) - 5
f(3) = 9 + 30 - 5
f(3) = 39 - 5
f(3) = 34

g(x) = 8x + 1
g(3) = 8(3) + 1
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h(x) = 3x - 4
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<u>x = 6
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f(6) = (6)² + 10(6) - 5
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g(x) = 8x + 1
g(6) = 8(6) + 1
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h(x) = 3x - 4
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h(6) = 18 - 4
h(6) = 14

I would explain to someone that you don't need to do any calculations to know the order of the functions when x is equal to 15 by knowing that f(x) is equal to 370, g(x) is equal to 121, and h(x) is equal to 41 to know that it is easy finding the function of x without calculating the answer.
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