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3 years ago

Use inverse operations to solve the equation. -5x=65

Mathematics

2 answers:

kicyunya [14]3 years ago

7 0

Divide both sides by -5 to get x= -13

dezoksy [38]3 years ago

5 0

Answer: x=-13

Step-by-step explanation:

X= 65/5

X=-13

Checked work .

-5x=65

-5x-13=65

65=65

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Which inequality represents all possible solutions of -3n < -18?

faust18 [17]

I hope this helps you

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3 years ago

What is 2x+y=4 and 2x+y=-1

butalik [34]

Answer:

{x,y} = {5,6}

Step-by-step explanation:

// Solve equation [1] for the variable x

[1] x = y - 1

// Plug this in for variable x in equation [2]

[2] 2•(y -1) - y = 4

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// Solve equation [2] for the variable y

[2] y = 6

// By now we know this much :

x = y-1

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// Use the y value to solve for x

x = (6)-1 = 5

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lidiya [134]

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2 years ago

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Julio and David were in Target and decided to check out the clearance section. They found pencils and erasers that were on sale

Sati [7]

Answer:

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Cost of one eraser: $\$0.03$

Step-by-step explanation:

Let be "p" the cost in dollars of one pencil and "e" the cost in dollars of one eraser.

Based on the information given in the exercise, you can set up the following system of equations:

$\left \{ {{4p+3e=0.37} \atop {3p+4e=0.33 }} \right.$

You can use the Elimination Method to solve the system of equations.

Multiply the first equation by -3 ad the second one by 4. Then add the equations and solve for "e":

{ $\left \{ {{-12p-9e=-1.11} \atop {12p+16e=1.32}} \right.\\..........................\\7e=0.21\\\\e=0.03$

Substitute the value of "e" into any original equation and solve for "p":

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3 years ago