9) EASY POINTS WILL GIVE BRAINLIST TO BEST ANSWERS

2 answers:

7 0

1(5) + 4(X) = 25
5 + 4X = 25
subtract 5 from both sides
4X = 25 - 5
4X= 20
divide both sides by 4
X = 20/4
x=5
Each eraser cost 5$

ra1l [238]2 years ago

3 0

You bought a magazine for $5 and four erasers. you spent a total of $25.

Magazine cost: 5$ each
Eraser cost: X$ each

Total cost is the number of items (1 magazine) times the cost of each item (5$). We don't know the cost of each eraser, so we represent that using a variable, X.

1(5) + 4(X) = 25

5 + 4X = 25

subtract 5 from both sides

4X = 25 - 5

4X = 20

divide both sides by 4

X = 20/4

X = 5

Each eraser cost 5$

You might be interested in

Can someone please help me!!!!

Schach [20]

<h2>Answer:</h2>

its 83

i have no explanation

6 0

3 years ago

Please help me solve the system of equations.

Iteru [2.4K]

Answer: (-2, 0) and (0, -2)

Step-by-step explanation:

This system is:

y + x = -2

y = (x + 1)^2 - 3

To solve this we first need to isolate one of the variables in one fo the equations, in the second equation we have already isolated the variable y, so we can just replace it in the first equation:

(x + 1)^2 - 3 + x = -2

Now we can solve this for x.

x^2 + 2*x + 1 - 3 = -2

x^2 + 2*x + 1 -3 + 2 = 0

x^2 + 2*x + 0 = 0

The solutions of this equation are given by the Bhaskara's formula, then the solutions are:

$x = \frac{-2 +- \sqrt{2^2 -4*1*0} }{2*1} = \frac{-2 +- 2}{2}$