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3 years ago

Which properties justify the steps taken to solve the system 4x + 3y =25 2x + 5y=19

Mathematics

1 answer:

defon3 years ago

7 0

Answer: we multiply the second equation by -2. This property is the multiplication property of equality (1).

Then, we add the two equations generated. (2) addition property of inequality.

Next, we divide both sides of the equation by 13. That is division property of inequality.

Moreover, we substitute the value obtained for y in the first equation. This is substitution property of equality.

Then, we simplify

Next, we add +3 to both sides of the equation in order to have an equation with only one side having a variable. That is addition property of equality.

Lastly, we divide both sides of the equation by 4. This is division property of equality.

Step-by-step explanation:

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Expand the following 2(x+3)

Maksim231197 [3]

Answer:

2x + 6

Step-by-step explanation:

2 will multiply everything inside the bracket.

2 x X =2x

2 X 3=6

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3 years ago

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Two points located on are J(1,-4) and K(-2,8). What is the slope of ?

trapecia [35]

Answer:

-4

Step-by-step explanation:

to do this you use y2-y1/x2-x1

so this would be -4-8/1- - 2

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2 years ago

Blueberry high-fiber muffins contain 51 % dietary fiber by mass. If a package with a net weight of 18 oz contains six muffins, h

8_murik_8 [283]

Answer:

In each muffin there are 1.53oz

Step-by-step explanation:

The first step is to get the weight of just one muffin. If the package contains six muffins we must divide the total weight by six.

$weight_{unit}=\frac{18oz}{6}=3oz$

The weight of just one muffin is 3oz.

Now, the problem says that blueberry high-fiber muffins contain 51 % dietary fiber by mass, which means that we must calculate the 51% of 3oz. We must take into account that 51% equals 51/100 which is 0.51. The equation would be:

$fiber=(3oz)(0.51)=1.53oz$

Finally, in each muffin there are 1.53oz of fiber.

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3 years ago

A line has a slope of 5 and passes through the point

podryga [215]

Answer:

Step-by-step explanation:

The equation is mx+b=y.

M=slope (in this case 5)

x=x coordinates

b=y intercept

y=y coordinates

For the x and y coordinates, I'll use (2,0).

5(2)+_=0

10+_=0.

In this case, we only have one awnser, -10. Since 10+(-10) are the only ways to equal 0.

Hope this helps,

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3 years ago

Find the sum of (x+5), (-4x-2), and (2x-1)

RideAnS [48]

I think the answer is -x+2.

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3 years ago

Which properties justify the steps taken to solve the system 4x + 3y =25 2x + 5y=19 ​

Which properties justify the steps taken to solve the system 4x + 3y =25 2x + 5y=19