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amid [387]
3 years ago
9

Can anyone check this if it’s right.

Mathematics
1 answer:
Romashka [77]3 years ago
6 0

Yes this is the right answer

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Talia bas 26 $1 coins, 20-cent coins, 50-cent coins. The number of $1 coins is 6 more than the number of 20-cent coins. The tota
horsena [70]

Answer:

8 fifty cents coin.

Step-by-step explanation:

Let's assign variable for the unknown number of coins.

Let there are 'x' number of $1 coins

'y' number of 20 cent coins

'z' number of 50 cent coints.

Totally there are 26 coins.

So, x+y+z=26

Now, there are 6 more $1 coins than 20-cent coins.

We can set up equation for this as

x= y+6

Now, total value of these coins is $17.20

We can setup equation as

100 x+20 y+50 z=1720

Now, substitute x as y+6

100(y+6) +20 y+50 z =1720

Distribute the 100 to get rid ( )

100 y+600 +20 y+50 z=1720

Combine like terms

120 y+50 z= 1120

Keep this equation as it is.

Plug in x as y+6 into x+y+z=26

y+6+y+z=26

2y+z=20

Now, take the two equations

2y+z=20

120y+50z=1120

Multiply first equation by -60 to eliminate the y terms when we add them.

-120y-60z=-1200

120y+50z= 1120

-------------------------

     -10z =-80

Divide both sides by -10

z=8

Now, plug in z as 8 into 2y+z=20

2y+8 =20

Subtract both sides 8

2y=12

Divide both sides by 2

y=6

Now, plug in y, z values into the first equation.

x+6+8=26

x+14=26

Subtract both sides 14

x=12

So, there are eight 50-cent coins.

4 0
2 years ago
What is the value for x in this equation?<br> 42x – 3 = 7.27
Flauer [41]

x = 0.2445238 is the only answer I found.
6 0
3 years ago
Read 2 more answers
What are the four different ways to solve a quadratic equation? How can you determine the zeros, the vertex, and axis of symmetr
enyata [817]
Zeros: Where the parabola crosses the x-axis.

Vertex: The turning point of the parabola.

AOS: The x-value where the turning point is.

Hope I was able to help.
3 0
3 years ago
Gertrude has a life insurance policy that will pay her family $97,000 per year if
schepotkina [342]

Answer:

90000 srry if im wrong

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
I am a student in need pls help me
solmaris [256]

Answer:

2*400= 2*400*1

2*400

800

or

2 x 400 = 2 x 100 x 4

100 x 4

= 400

<u>I hope this helps:</u>

Sorry if it didn't :(

7 0
3 years ago
Read 2 more answers
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