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3 years ago

Which matrix best represents the system of equations below?

1 answer:

6 0

$\left\{\begin{array}{ccc}-10x-9y+13z=12\\8x-7y-5z=15\\5x+4y-6z=-12\end{array}\right\\\\\begin{array}{ccc}\ \ \ \ x&\ \ \ y&\ \ z\end{array}\\\left[\begin{array}{ccc|c}-10&-9&13&12\\8&-7&-5&15\\5&4&-6&-12\end{array}\right]$

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My lawn is 17ft wide and 20ft long, each square foot of lawn gets 1350 new snowflakes per min how much snow in kilograms accumul

Alina [70]

Answer:

46.818 kg

Step-by-step explanation:

First, find the surface area of your yard. This is found by multiplying the length and width.

The equation for this is (l*w)=sa

So,

l=20ft

w=17ft

(20*17)= 340 square feet.

So, if each square foot gets 1350 new flakes per minute, you are going to find how much the entire yard gets in a minute by multiplying the surface area by 1350.

So,

(340*1350)= 459000 flakes for the entire yard in one minute.

Since there is 60 minutes in an hour, multiply 459,000 by 60.

459,000*60= 27,540,000 new flakes in the yard per hour.

Now, to find the weight in milligrams:

27,540,000*1.7= 46,818,000 mgs

Finally, because a kilogram is equal to one million milligrams (mg),

46,818,000/1,000,000= 46.818 kg

7 0

3 years ago

What is the slope of the line given by the equation -3x = 30 - 5y?

zaharov [31]

Answer:

The slope of the line given by the equation -3x=30-5y is $\frac{3}{5}$ .

Step-by-step explanation:

-3x=30-5y

Move the -3x to the right side of the equal sign and the -5y to the left.

5y=30+3x

By switching them to opposite sides, their sign changes from - to +.

Then, divide both sides by 5 in order to isolate the y.

$\frac{5y}{5} = \frac{30+3x}{5}$

You get:

According to y=mx+b, mx refers to the slope.

In this case, the slope would be $\frac{3}{5}$ .

8 0

3 years ago

a bag contains 4 red, 3 orange and 5 purple marbles. what is the probability of drawing 2 purple marbles in a row without replac

dlinn [17]

Step-by-step explanation: this one is for zack!!!!!!!!!

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3 years ago

Read 2 more answers

Question options: (1, 4.5) (2, 1.5) (1.5,2) (6,4)

sweet [91]

Answer:

(1.5,2)

Step-by-step explanation:Its the only one furthest away from the rest

4 0

3 years ago

HELPPPP PLEASEEE!!!!!

LenaWriter [7]

Answer:

It is undefined

Step-by-step explanation:

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3 years ago