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3 years ago

Urgent help please! Answer any of the questions!

Mathematics

1 answer:

kiruha [24]3 years ago

8 0

#1. x = - (2y) / (1-y)

#2. x = (-4y-3)/(1-y)

I can't really see the other questions, so I only did the first two. Hope this helps!

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What is the volume of a prism that is 11×13×21?

posledela

Answer:

3003 units^3.

Step-by-step explanation:

Just multiply the dimensions :

11 * 13 * 21

= 143 * 21

= 3003 units^3.

8 0

3 years ago

Which is a multiple of 15

serious [3.7K]

Multiples of 15 are: 15,30,45,60,75,90,105,120,135,150,165,180,195,210,225,240,255,270,285,300,315,330,345,360,375,390,405,420,435,450,465,480,495,510,525,540,555,570,585,600,615,630,645,660,675,690,705,720,735,

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3 years ago

What is 3 tens plus 7 tenths plus 8 hundredths as a decimal

Novay_Z [31]

3 tens= 30
7 tenths= 0.7
8 hundredths= 0.08

so 30+ 0.7+0.08= 30.78

4 0

3 years ago

Question 7<br> What is the median of the following distribution? -<br> (6,4,8,3,72,8,3,3,3)

GuDViN [60]

Answer:

Step-by-step explanation:

the number in the middle

8 0

3 years ago

Solve the following system of equations<br>2x – 3y = 6<br>4x+2y=4

FinnZ [79.3K]

Answer:

$\boxed{(\frac{3}{2} ,-1)}$

Step-by-step explanation:

$\left \{ {{2x-3y=6} \atop {4x+2y=4}} \right.$

It seems this system of equations would be solved easier using the elimination method (the x and y values are lined up).

Multiply everything in the first equation by -2 (we want the 4x to be able to cancel out with a -4x).

$2x-3y=6 \rightarrow -4x+6y=-12$

Now line up the equations (they are already lined up - convenient) and add them from top to bottom.

$\left \{ {{-4x+6y=-12} \atop {4x+2y=4}} \right.$

The -4x and 4x are opposites, so they cancel out.

Adding 6y and 2y gives you 8y, and adding -12 and 4 gives you -8.

$8y=-8$

Divide both sides by 8.

$y=-1$

Since you have the y-value you can substitute this in to the second (or first equation, it doesn't necessarily matter) equation.

$4x +2(-1)=4$

Simplify.

$4x -2=4$

Add 2 to both sides.

$4x=6$

Divide both sides by 4.

$x=\frac{6}{4} \rightarrow\frac{3}{2}$

The final answer is $x=\frac{3}{2} ,~y=-1$ .

$(\frac{3}{2} ,-1)$

5 0

3 years ago