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garri49 [273]
3 years ago
14

I only need the equations, I can solve it.

Mathematics
2 answers:
xxMikexx [17]3 years ago
6 0
You have a pile of 22 coins that includes nickels and dimes
Let n= nickels and d= dimes
total coins= nickels and dimes
n+d=22
The total value of the coins is $1.20
d=1.20-n
You would solve by system of equations.
n+d=22
d=1.20-n
I suggest using process of substitution
natali 33 [55]3 years ago
4 0
How can you solve it if you don't know the equations?  :P  Just kidding...

n+d=22, so we can say that d=22-n

5n+10d=120, and using d found above in this equation gives you:

5n+10(22-n)=120

5n+220-10n=120

-5n=-100

n=20, and since  d=22-n, d=2

So there are two dimes and twenty nickels...

check...

20(5)+2(10)=100+20=120 cents which is $1.20

n+d=22, 20+2=22, 22=22
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Which graph represents the function on the interval [-3,3]? f(x)=[x]-3
Svetlanka [38]
<h2>Answer:</h2>

Shown below

<h2>Step-by-step explanation:</h2>

This function represents greatest integer function, which is the most famous of the step functions, which is denoted by [x]. So, this function is defined as:

f(x)=[x] \ the \ greatest \ integer \ less \ than \ or \ equal \ to \ x.. The graph of the greatest integer function has the following characteristics:

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b) The range of the function is the set of all integers.

c) The graph has a y-intercept at (0,0) and x-intercept in the interval [0,1)

d) The graph is constant between each pair of consecutive integers.

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5 0
3 years ago
Find the solution of this system of equations -7x-6y=59 and -8-6y=58
Fofino [41]
-7x - 6y = 59.....multiply by -1
-8x - 6y = 58
----------------
7x + 6y = -59 (result of multiplying by -1)
-8x - 6y = 58
---------------add
-x = -1
x = 1

-7x - 6y = 59
-7(1) - 6y = 59
-7 - 6y = 59
-6y = 59 + 7
-6y = 66
y = -66/6
y = -11

solution is (1,-11)
8 0
3 years ago
I looking for either an explanation or answer. I really dont understand how to do this. Any help is appreciated
fomenos
An equation, in slope-intercept form, that shows the relationship between the number of apples purchased and the total price is
 y = 1.25x + 0.25.
 the slope of this equation is 1.25
 The relation with the slope is that each apple has a cost of 1.25 + 0.25 $.
 the y-intercept of this equation is 0.25
 The interception with the y axis means that the cost of production of the apple is 0.25, since, if you buy 0 apples the price is 0.25 $.
 The relationship between both quantities is linear.
5 0
2 years ago
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