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sergij07 [2.7K]
3 years ago
11

What will be the answer for x?

Mathematics
1 answer:
leonid [27]3 years ago
8 0

Answer:

x=8

Step-by-step explanation:

5x+6+134=180

5x=40

x=8

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At the local pet store, zebra fish cost $2.00 each and neon tetras cost $2.15 each. If Ernesto bought 15 fish for a total cost o
bezimeni [28]
So first create and define your variables:
Z = amount of zebra fish
N = amount of neon tetras

Now create your equations:
2z+2.15n=31.20
z+n=15
This is your system. There are multiple methods to use but in this problem I’ll use the substitution method by simplifying the bottom equation.
2z+2.15n=31.20
z=15-n
Now I’ll plug the bottom equation into the top one.
2(15-n)+2.15n=31.20
And just solve from here.
30-2n+2.15n=31.20
0.15n=1.20
n=8
So he bout 8 neon tetras, and 15-8= 7, so he bought 7 zebra fish
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3 years ago
What numbers add to 21 but equal 472
Anastaziya [24]
Hey there,

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8 0
3 years ago
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There are 15 animals in a barn. These animals are horses and chickens. There are 44 legs in all. Write a system of equations tha
olganol [36]

Answer:

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Step-by-step explanation:

To solve this, first you would need to list out all of the available ratios. Then, find out how many legs are in each option.:

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12 horses  and 3 chickens = etc.

11 horses and 4 chickens

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5 0
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Answer:

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Step-by-step explanation:

To solve for r in terms of s, t, and u, means to have r on one side and have t, u, and s.

t = u - s + r

t - u = s + r

t - u - s = r

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