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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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A locus of points</span> is the set of <span>points<span>, and only those </span>points</span>, that satisfies given conditions. The locus of points at a given distance from a given point is a circle whose center is the given point<span> and whose radius is the given distance.</span>

4 0
4 years ago
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As a children's librarian, Jodi Hassam earns $15.35 an hour
mihalych1998 [28]

Answer:

Step-by-step explanation:40X15.35+(16(15.35X1.5)= 982.4

3 0
3 years ago
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Help. please..<br>with steps.​
Mandarinka [93]

Answer:

  Option 2

Step-by-step explanation:

The account balance multiplier for the compound interest option is ...

  (1 +r)^t = 1.05^8 ≈ 1.477455

The account balance multiplier for the simple interest option is ...

  (1 +rt) = 1 +0.06·8 = 1.48

Jadwa should choose option 2 for this investment. It will earn about £5.09 more in interest over the 8-year period.

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3 0
3 years ago
Y=3x+2 is the equation of a straight line graph. Where does it cross the y-axis?
tamaranim1 [39]
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8 0
3 years ago
PLEASE HEP ME QUICK!!!!: Tom travels between the two mile markers shown and then finds his average speed in miles per hour. Sele
slega [8]

Answer:

speed=\frac{195\ miles}{3\ hours}

3\ hours=\frac{195\ miles}{speed}

3\ hours*(speed)=195\ miles

Step-by-step explanation:

we know that

The speed is equal to divide the distance by the time

Let

x -----> the distance in miles

y ----> the time in hours

speed=\frac{x}{y}

we have

The distance is equal to subtract 35 miles from 230 miles

x=230-35=195\ miles

The time is equal to subtract 1:30 pm from 4:30 pm

y=4:30\ pm-1:30\ pm=3\ hours

substitute in the formula of speed

speed=\frac{195\ miles}{3\ hours}

<em>Isolate 3 hours</em>

3\ hours=\frac{195\ miles}{speed}

<em>Isolate 195 miles</em>

195\ miles=3\ hours*(speed)

7 0
3 years ago
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