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3 years ago

Hi, i need help on these. thank you very much [urgent]

Mathematics

1 answer:

stepladder [879]3 years ago

7 0

$(4y - 3x) \times (4y + 3x)$

$( {11a}^{5} - {b}^{4} ) \times ( {11a}^{5} + {b}^{4} )$

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Which expressionis equal to (-7x+5.1y)-(-9x+5.3y)

Furkat [3]

Answer:

The simplified expression for the given expression will be:

c. $2x-0.2y$

Step-by-step explanation:

Given expression:

$(-7x+5.1y)-(-9x+5.3y)$

To simplify the expression.

Solution:

In order to simplify the expression, we will first remove the parenthesis by reversing the signs of the terms inside the parenthesis which lies after a negative sign out side the parenthesis.

This is because negative multiplies to a negative to give a positive and negative multiplies to a positive to give a negative.

So, we have:

⇒ $-7x+5.1y+9x-5.3y$

Combining like terms

⇒ $-7x+9x+5.1y-5.3y$

The like terms can be evaluated as

$-7x+9x=2x$

$5.1y-5.3y=-0.2y$

Thus, the simplified expression will be:

⇒ $2x-0.2y$

7 0

3 years ago

Complete the equation describing how x and y are related

Orlov [11]

Answer:

5 is the answer

Step-by-step explanation:

because it you add 5 to all the x values you get the y values

6 0

3 years ago

What is the y intercept of a graph containing the two points (3,1) and (7,-2)?

olasank [31]

The y intercept of a graph containing the two points (3,1) and (7,-2) is $\frac{13}{4}$

Solution:

Given points are (3, 1) and (7, -2)

The equation of line in slope intercept form is given as:

y = mx + c ------- eqn 1

Where, "m" is the slope of line and "c" is the y intercept

Let us first find the slope of line

The slope of line is given as:

$m = \frac{y_2-y_1}{x_2-x_1}$

Here the points are (3, 1) and (7, -2)

$(x_1, y_1) = (3, 1)\\\\(x_2, y_2) = (7, -2)$

Substituting in formula, we get

$m = \frac{-2-1}{7-3}\\\\m = \frac{-3}{4}$

To find the y intercept:

$\text{Substitute } m = \frac{-3}{4} \text{ and } (x, y) = (3, 1) \text{ in eqn 1 }$

$1 = \frac{-3}{4} \times 3 + c\\\\1 = \frac{-9}{4} + c\\\\ \text{Simplify the above equation } \\\\1 = \frac{-9+4c}{4}\\\\4 = -9 + 4c\\\\13 = 4c\\\\\text{Divide both sides by 4 }\\\\c = \frac{13}{4}$