1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
PilotLPTM [1.2K]
2 years ago
11

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

f $31.20, not including tax, how many zebra fish did he buy?
Mathematics
2 answers:
bezimeni [28]2 years ago
6 0
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
forsale [732]2 years ago
3 0

Answer:

The correct answer is 8 neon tetras and 7 zebra fish.

You might be interested in
What is the justification for each step in the solution of the equation?
jeka57 [31]

13x−4=−36−27x+12: Distributive property  

13x−4=−24−27x: Combine like terms

40x=−20: Addition Property of equality

6 0
2 years ago
Read 2 more answers
What is 1/3 added to 5/6
Elenna [48]
7/6
Change 1/3 to 2/6 in order to have a common denominator.
Then add the numerators (2 and 5) and keep the denominator. <span />
7 0
2 years ago
Read 2 more answers
What is the distance between (5,8) and (2,4) by using distance formula
Dimas [21]

Answer:

Distance = 5

Step-by-step explanation:

D= sqrt (x1-x2)^2 + (y1-y2)^2

(5-2)^2 + (8-4)^2=3^2 + 4 ^2 = 9 +16 = 25

Sqrt of 25 = 5

Distance = 5

Hope this helps

7 0
3 years ago
Read 2 more answers
How do u solve 4(3x-1)=9-x
Nastasia [14]

Answer:

x = 1

Step-by-step explanation:

Well the first step is to apply the distributive property:

4(3x - 1) is equal to (12x - 4). You DISTRIBUTE a '4' to what is inside the parentheses.

And btw, to make it easier, you can make 9 - x so that x is first. For example, (-x + 9). They're both the same thing, just written differently.

Your new equation is 12x - 4 = -x + 9. You want to now solve the equation.

Add the (-x) to both sides. It cancels out on the right side and you add it to 12x on the left side.

[If there's no number in front of a variable, you can always just put 1 in order to make it easier]

12x + 1x = 13x. Your new equation is 13x - 4 = 9. This should look very familiar. You simply add 4 to both sides. 9 + 4 = 13

Finally, 13x = 13. Divide 13 ÷ 13 to get 1.

x = 1

5 0
3 years ago
Convert the function into intercept form. Show your work. y=-x^2+5x+36
UkoKoshka [18]
Y = -x2 + 5x + 36 <span>→ y = -(x2 -5x -36)


</span><span>→ y =  -(x2 - 9x +4x - 36)


</span><span>→ y = -[x(x-9) + 4(x - 9)]


</span><span>→ y = -(x - 9)(x + 4)

Your answer would be </span>y=-(x-9)(x+4).
7 0
2 years ago
Other questions:
  • explain how you can use multiplication to find the quotient 3/5 divided by 3/15. then evaluate the expression
    13·2 answers
  • Help!!!!!!! Thank you!!!!!!!
    9·2 answers
  • Select all the irrational numbers
    12·1 answer
  • If b-a=c-b=d-c, what is d-b
    6·1 answer
  • Sophia made a scale drawing of a museum in the drawing 3 inches represents 15 feet the length of one Gallery Wall on the drawing
    6·1 answer
  • Anybody Know This. ?
    15·1 answer
  • Victor makes decorations for his birthday party. He needs 5/6 yard of ribbon for each decoration. How much ribbon does Victor ne
    9·1 answer
  • $60 simple interest is received on a loan each year. When the rate of interest is increased by 0.5%, the simple interest is $70.
    13·1 answer
  • Read the following prompt and type your response in the space provided.
    9·1 answer
  • The teacher asks the students to record as many different patterns they can think of for her number rule. Identify what type of
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!