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3 years ago

-x- y=-4 -2x+y=-5 How do you it for solving eliminating

Mathematics

1 answer:

Ludmilka [50]3 years ago

7 0

Answer:

x = 3, y = 1

(3,1)

Step-by-step explanation:

Elimination is a method of solving systems where we add or subtract the two equations to "eliminate" one of the variables.

Take a look at our system. We have a -y and a +y. If we added those together, they would cancel!

-x- y=-4

-2x+y=-5 +

--------------

-3x + 0y = -9

It worked! No more y. Solve for x!

-3x = -9

Plug x back in to get y.

-x - y = -4

-3 - y = -4

-y = -1

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Answer:

She will get 12 books from the store

Step-by-step explanation:

We can use ratio's to solve

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Using cross products

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Divide each side by 3

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3 years ago

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The line plot shows the growth, In Inches, of Isabella's plant over 13 days. Growth of Isabella's Plant What is the total growth

mart [117]

Line plots are used to display data elements using markers

The total growth, in inches, of Isabella's plant is $4\frac{1}2$ inches

<h3>How to determine the total growth</h3>

From the line plot, the total growth can be represented as:

$Total = \frac 18 * 4 + \frac 28 * 2 + \frac 38 * 3 + \frac 48 * 1 + \frac 58 * 3$

Evaluate the products

$Total = \frac 48+ \frac 48 + \frac 98 + \frac 48 + \frac {15}8$

Evaluate the sum

$Total = \frac{4+4+9+4+15}8$

Evaluate the numerator

$Total = \frac{36}8$

Evaluate the quotient

$Total = 4\frac{1}2$

Hence, the total growth, in inches, of Isabella's plant is $4\frac{1}2$ inches