Is it possible to solve the following system by using substitution? Which method, substitution or elimination is more efficient? Complete the explanation.

braceleftze 3x − 2y = 11
x + 2y = 25
possible to use substitution. Solve the second equation for x to get x =
y + 25. Substitute x in the first equation and solve for y. Then substitute this value for y in either original equation to get a solution of (
). The elimination method is
efficient because there are
calculations and they are
to do.

Answer:

4.1751    6.8     6.806     6.86

Step-by-step explanation:

Hello!

∘ ∘ ∘ ∘ ∘ ∘ ∘ ∘ ∘  ∘ ∘ ∘ ∘ ∘ ∘ ∘ ∘ ∘ ∘ ∘ ∘ ∘ ∘ ∘ ∘

[tex]\bold{\displaystyle\frac{y_2-y_1}{x_2-x_1}}[/tex]

[tex]\bold{y_2}[/tex]  is the y-coordinate of the second point

[tex]\bold{y_1}[/tex] is the y-coordinate of the first point

[tex]\bold{x_2}[/tex] is the x-coordinate of the second point

[tex]\bold{x_1}[/tex] is the x-coordinate of the first point

Check the First example:

[tex]\bf{y_2}[/tex] = 6

[tex]\bf{y_1}[/tex]= -2

[tex]\bf{x_2}[/tex]=3

[tex]\bf{x_1}[/tex] = -9

[tex]\bf{\displaystyle\frac{6-(-2)}{3-(-9)} }[/tex]

6-(-2) is the same as 6+2; same with 3-(-9)

[tex]\bf{\displaystyle\frac{6+2}{3+9}}[/tex]

Simplify:

[tex]\bf{\displaystyle\frac{8}{12}}[/tex]

Is the slope negative? Nope!

How about Option B?

[tex]\bf{\displaystyle\frac{7-9}{5-6}}[/tex]

[tex]\bf{\displaystyle\frac{-2}{-1}}[/tex]

Right now it seems like the slope's negative, huh? Well, wait for it...

[tex]\bf{2}[/tex]

Kaboom!

Please remember that

[tex]\bigstar^\circ[/tex] A negative number multiplied/divided by a negative number equals... a positive! :-)

We have 2 options left: C & D.

[tex]\displaystyle\frac{-8-1}{8-(-8)}[/tex]

[tex]\displaystyle\frac{-8-1}{8+8}}[/tex]

[tex]\displaystyle\frac{-9}{16}}[/tex]

We did it! The slope's actually negative :)

How about Option D (just to make sure the third option is right)

-9-(-8)/-1-2

-9+8/-3

-1/-3

Again we have a negative over a negative.

[tex]\boxed{\boxed{\bold{Option~C}}}[/tex]

Hope everything is clear.

Let me know if you have any questions!

#LearnWithJoy

[tex]\text{An~Emotional~Helper}[/tex]

[tex]\rule{2}{2}~\rule{2}{2}~\rule{2}{2}~\rule{2}{2}~\rule{2}{2}~\rule{2}{2}[/tex]

Answer: you didn't put any number sentences but these all equal 2.015

2.015*1

1.0075*2

0.67166666*3

0.50375*4

0.403*5

0.3358333*6

0.28785714285714285714*7

0.251875*8

0.22388888*9

0.2015*10

Answer:

C

Step-by-step explanation:

you welcome don't know what other person was doing

Answer:

2/6 percent chance

Step-by-step explanation:

Because rolling the dice 3 times will give you the fraction 2/6.

Answer:

1: Gene has 45

2: C

Step-by-step explanation:

C gets you to 45.

I don't have to explain #1 because #2 explains the equation.

Answer:

1) 4 packs of balloons

2) He played 2 rounds

3) She would watch 56 minutes per day

4) She would have 54 apps left

5) 8 x (9+8) = 136

6) 2 1/4 x 3 1/4 = 117/16 OR 7 5/16

Step-by-step explanation:

Good Luck and I hope that you pass!!! :D

Answer:

a. 25

b. 2

c. 2.21

Step-by-step explanation:

Answer:

Figure 1. 25 Hours

Figure 2. 2 Hours

Figure 3. 2.21 Hours

Step-by-step explanation:

Answer:

9 straps for $10.25

Step-by-step explanation:

Price rate

Better buy

Answer:

9 straps

Step-by-step explanation:

If you're selling 30 straps for $66 then you get a 2.2 per each

But 9 straps for $10.25 will get 1.139

So, the value that's smaller which is 9 straps for $1.139 is a better buy

Answer:

1. A single outlier causes the value of the mean to move slightly away from the outlier.

2.There is one outlier that indicates an unusually small number of assignments required in that class.

Step-by-step explanation:

Answer:

8/8

Step-by-step explanation:

There are two pies, and each one was cut into fourths. There are four fourths in a whole, and since there are two wholes, there are two four fourths (I don't know if this makes sense).

Basically, multiply how many fourths (four per pie) by how many pies there are.

4 x 2 = 8

There are 8 pieces.

Answer:

the answer  is infinity

Step-by-step explanation:

Answer:

960 ft

Step-by-step explanation:

A Square=L²

              =(8)²              

              = 64 FT

A Circle= [tex]\pi[/tex]r²

            =r=64/2=32

            =[tex]\pi[/tex](32)²

            =1024[tex]\pi[/tex]

A Shape=

             =A square- A circle

            = 64-1024[tex]\pi[/tex]

           = 960 FT

Answer:

1/36

Step-by-step explanation:

Meal: 4 choices

Side: 3 choices

Beverage: 3 choices

Total number of possible combinations: 4 × 3 × 3 = 36

The specific combination of cheese pizza, apple, and milk is 1 of the 36 possible choices.

p(cheese pizza, apple, milk) = 1/36

Answer:

e

Step-by-step explanation:

We first have to find out how many outcomes there are in total. That means finding out how many meals, sides, and beverages there are.

Meals: cheese pizza, cheeseburger, hotdog, and salad (4)

Sides: banana, apple, and yogurt (3)

Beverages: milk, water, and juice (3)

4 x 3 x 3 = 36

There are 36 possible outcomes.

We need to find the probability that Zoe will choose cheese pizza, an apple, and milk. Those are three outcomes.

The probability is 3/36.

The fraction 3/36 can be simplified to 1/12.

uh looking at the other answer that one is probs right

either way, hope this helps?

Answer:

The 20 pound bag is a better by for only $66.98

Step-by-step explanation:

The large bag is better because the small bag is $27.93 for 7 pounds 7x3=21,so 3x27.93=83.79 is $16.81 more than the cost for the large bag

hope this makes sense;)

Answer:

10 hours

Step-by-step explanation:

assuming its 8pm if its 8 am 4 hours

Answer:$24

Step-by-step explanation:

Answer:

$26.32

Step-by-step explanation:

If one pound costs 3.29, you have to multiply by the number of pounds (8)

8·3.29=26.32 or 3.29+3.29+3.29+3.29+3.29+3.29+3.29+3.29=26.32

Answer:

34 mm

Step-by-step explanation:

8+8+6+12=34 mm

Answer:

2 is the answer

Step-by-step explanation:

there is mo step by step explanation

Answer: c) 2

Step-by-step explanation: i dont know if you are being serious or not haha but have a good day<3 -marina mae

Answer:

He owes $6.50.

Step-by-step explanation:

You didn't give that answer in the multiple choice answers, but yet there are four options and only two of them are different.

Answer:

41

Step-by-step explanation:

if they are supplementary they equal 180, so all you have to do is subtract 180-139=41

Answer:

7.56$

Step-by-step explanation:

108 x 7 / 100 = 7.56$

Answer:

The Only possible answer is PT or TP

Step-by-step explanation:

Since Perpendicular lines are lines that cross each other at a 90 Degree angle we need to find a line that falls at a 90 Degree angle to TR

Explanation:

MAD = mean absolute deviation

The larger the MAD, the more spread out the scores will be.

Therefore, Maggie has the most spread out scores in her creative writing class.

Answer:

720in.^3

Step-by-step explanation:

Find the area of the base (60in^2) and multiply it by the length of the prism (12) to get 720in.^3

Answer: 720 in³

Step-by-step explanation:  that one person was right

Answer:Q9 is 12.2. Q10 is C. Q11 is C. Q12 Is 2.8. The level 3-4 thing the hight is 24.

Step-by-step explanation: a^2+b^2=c^2 pythagoras theorem or whatever. Hope this helped.