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maksim [4K]
3 years ago
10

Rick bought some tetra fish and goldfish for his fish tank. He bought twice as many goldfish as he did tetras. Each goldfish cos

ts $1.50, and each tetra fish costs $2.00. He spent $20 on the fish. Which system can be used to represent x, the number of tetra fish, and y, the number of goldfish, he purchased?
Mathematics
2 answers:
OlgaM077 [116]3 years ago
6 0
1.50y(2)+2.00x=20

Now use the quadratic formula to solve 
weqwewe [10]3 years ago
5 0

Answer:

2x = y

2x + 1.5y = 20

Step-by-step explanation:

x represents the number of tetra fish

y represents the number of goldfish

Rick bought twice as many goldfish as he did tetra so multiply 2 by the number of tetra fish to get the number of goldfish or 2x = y

Tetra fish cost $2.00 each

Goldfish cost $1.50 each

Rick spent $20 on fish so $2 multiplied by number of tetra fish + $1.50 multiplied by number of goldfish will equal $20 (total spent on fish) or

2x + 1.5y = 20

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Lionel wanted to share 4 muffins with his 5 friends. He separated the muffins into 6 equal parts​
Alinara [238K]

Answer:

24 muffins, each friend gets 4. There are 4 remaining

Step-by-step explanation:

4 0
3 years ago
Select an equation that passes through the point (5,7) and is perpendicular to the line x=4
alexandr1967 [171]

y = 7

x = 4 is a vertical line parallel to the y- axis passing through all points with an x- coordinate of 4

A line perpendicular to x = 4 will be a horizontal line parallel to the x- axis with equation y = c where c is the value of the y- coordinate the line passes through.

line passes through (5 , 7) with y- coordinate 7

The equation is therefore y = 7


8 0
3 years ago
Solve for x<br> -3(x + 4) - 2 = -2(x - 5)<br> x= -4<br> x = -11/5<br> x = 24<br> x = -24
Gala2k [10]

Answer:

-24

Step-by-step explanation:

-3 (x + 4) - 2 = -2 (x - 5)

-3x - 12 - 2 = -2x + 10

-3x + 2x = 10 + 12 + 2

-x = 24

x = -24

5 0
3 years ago
What are exactly two sums that are equivalent to 7(10a+3b)
lina2011 [118]
7(9a+4b) and 7(8a+5b)
7 0
3 years ago
Triangle RST has vertices located at R (2,3), S (4,4), and T (5,0).
Mazyrski [523]

The slope of RS, RT, and ST are 1/2, -1 and -4 respectively

<h3>Triangle and slopes</h3>

Given the folllowing coordinates R (2,3), S (4,4), and T (5,0) os triangle RST

The formula for calculating the distance is expressed as:

  • D = √(x2-x1)²+(y2-y1)²

For length RS:

D = √(4-3)²+(4-2)²

RS = √1+4
RS= √5

For length RS:

RT = √(0-3)²+(5-2)²

RT = √9+9
RT= 3√2

For length ST:

D = √(0-4)²+(5-4)²

ST = √16+1
ST= √17

Since all the sides are different, the triangle is a scalene triangle.

For the slope of the sides

For the side RS;

Slope = 4-3/4-2

Slope of RS = 1/2

For the side RT:

Slope = 0-3/5-2

Slope of RT = -3/3 = -1

For the side ST

Slope of ST = 0-4/5-4
Slope of ST = -4/1 = -4

Hence the slope of RS, RT, and ST are 1/2, -1 and -4 respectively

Learn more on slope and distance here: brainly.com/question/2010229

6 0
2 years ago
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