Pleaseeeee help!!!!! with also the steps.. Question: Find the solution for a system of equations by elimination
3x – 6y = 12
5x - 2y = 10

Answer:

third option

Step-by-step explanation:

[tex]first\:one:\\\\2x+10=-2x+10 \rightarrow\leftarrow\\\\second:\\\\-2(x+5)=2x-10\\\\-2x-10=2x-10\rightarrow\leftarrow\\\\third:\\\\-2x-10=-2(x+5)\\\\-2x-10=-2x-10 \\\\fourth:\\\\-2(x-5)=-2x-10\\\\-2x+10=-2x-10\rightarrow\leftarrow[/tex]

Note: this symbol [tex]\rightarrow\leftarrow[/tex] means contradiction, you can take it as doesn't work

I hope that i explained enough

Answer:

220 = B + 30

Step-by-step explanation:

This can be rearranged many ways

B= 190

B= 220 - 30

ETC...

Answer:

4 glasses

Step-by-step explanation:

im sorry if im wrong

Answer:

4 glasses

Step-by-step explanation:

ur welcome

Answer:

I think A

Step-by-step explanation:

Answer:

The answer is letter D.

Step-by-step explanation:

hope this helps

Answer:

You could do 50 2 seat tables and 5 4 seat tables

You could do you could do 40 2 seat tables and 10 4 seat tables

Step-by-step explanation:

brainliest plz

Answer:

4

Step-by-step explanation:

its 4 lol

Answer:

4

Step-by-step explanation:

Answer:

4

Step-by-step explanation:

you multiply -2 and 7 which makes a negative then you subtract from 15 and get 1 so then you divide 1 by 4 which gives you 4

Answer:

u do edg2020 just like me

 4 is corrrrect answerrrrr

Answer: c

Step-by-step explanation:

Answer:

Her meal was $26 and 62 cents

Step-by-step explanation:

Answer:

Doesn't look like a geometric sequence.

Step-by-step explanation:

If 1, -4, 16 keeps repeating then the answer is 16.

Answer:

1cm =4 cm

Step-by-step explanation:

28/7=4

so Scale is 4

Have a nice Day , I would appreciate it if you could mark my answer brainliest

The drawing should have a scale of 400:1.

A scale is a group of levels or numbers that are applied to a certain system of measurement or comparison.

Given, the drawing length is 7cm and the real length is 28 meters.

real length in cm = 2800. hence,

Scale of drawing = 2800: 7 = 400 : 7

Therefore, 400: 1 would be the scale of the given drawing.

Learn more about scale here:

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Answer:

[tex]350 * D \geq 1400[/tex]

[tex]D\ge 4[/tex]

This means that the family must travel for at least 4 days.

Step-by-step explanation:

Given

[tex]Rate = 350\ miles\ daily[/tex]

[tex]Distance = 1400\ miles\ (atleast)[/tex]

Required

Determine and solve the inequality

The number of days is represented with D

So:

On any D number of days, the family would have covered a distance of 350 * D miles

If the total distance is at least 1400, then the inequality is:

[tex]350 * D \geq 1400[/tex]

[The term "At least" is used to represent greater than or equal to]

[tex]350 * D \geq 1400[/tex]

Divide through by 350

[tex]\frac{350 * D}{350} \ge \frac{1400}{350}[/tex]

[tex]D \ge \frac{1400}{350}[/tex]

[tex]D\ge 4[/tex]

This means that the family must travel for at least 4 days.

Answer:

265.1

Step-by-step explanation:

10% = 0.1

15% = 0.15

0.1(42)(8) + 0.15(14)(15) + 200 = 33.6 + 31.5 + 200 = 265.1 - total amount  Adam earned last week.

Answer:

2.14?

Step-by-step explanation:

(I'm not good at explaining, but I THINK its 2.14)

Step-by-step explanation:

18/hour life guarding and 9/hour clearing tables. so 9 divided by 144 gives you ur hours then u just divide by 2 to get life guarding hours pls tell me if u need help

Step-by-step explanation:

A(-4, 5) => A'(-4+2, -5) = A'(-2, -5)

B(-6, -4) => B'(-6+2, -(-4)) = B'(-4, 4)

C(4, -4) => C'(4+2, -(-4)) = C'(6, 4)

Hence the new coordinates are A'(-2, -5), B'(-4, 4) and C'(6, 4).

Answer:

Step-by-step explanation:

Answer:

I replaced x with y because, If it was x there would be no graph

Step-by-step explanation:

Answer:

Step-by-step explanation:

Typically you would want to solve this equation by dividing both sides by 3 but we need to find an equivalent equation that gives the same answer. 3 divided by 3 is the same as 3 times 1/3. Thus;

3x * 1/3 = 9 * 1/3

x = 3

Best of Luck!

Answer:

3

Step-by-step explanation:

3x = 9

= 3x/3 = 9/3

= 3

Answer:

No solution

Step-by-step explanation:

Answer:

Zero

Step-by-step explanation:

Given:

Decay rate: 1.5% per year = -0.015

To find:

The half life.

Solution:

The continuous exponential decay function is

[tex]A(t)=Ae^{-kt}[/tex]

where, a is initial value, -k is decay rate and t is time period.

For half life, [tex]A(t)=\dfrac{A}{2}[/tex],

[tex]\dfrac{A}{2}=Ae^{-0.015t}[/tex]

Dividing both sides by A.

[tex]\dfrac{1}{2}=e^{-0.015t}[/tex]

Taking natural log on both sides.

[tex]\ln \dfrac{1}{2}=\ln e^{-0.015t}[/tex]

[tex]-0.69314718=-0.015t[/tex]

Divide both sides by -0.015.

[tex]\dfrac{-0.69314718}{-0.015}=t[/tex]

[tex]46.209812 =t[/tex]

[tex]t\approx 46[/tex]

Therefore, the half life is 46 years.

Answer:

6 mph

Step-by-step explanation:

the cars acceleration was

6mph

Answer:

2%

Step-by-step explanation:

so the point [tex](\sqrt{3},\sqrt{7})[/tex] is in the circumference so the distance from (0,0) to this point will be the radius of the bullseye

[tex]x=\sqrt{(\sqrt{3}-0)^2+(\sqrt{7}-0)^2}\\\\x=\sqrt{3+7}\\\\x=\sqrt{10}[/tex]

so that's the radius

so the area will be

[tex]A=\pi x^2\\\\A=\pi (\sqrt{10})^2\\\\A=10\pi[/tex]

so the percentage is

[tex]P=\frac{A}{1600}\\\\=\frac{10\pi}{1600}\\\\=\frac{\pi}{160}\\\\P\approx 0.02[/tex]

so it's 2%

Answer:

Step-by-step explanation:

9. 31 + 5 = 36

10. 16 - 4 = 12

11. 28 - 1 = 27

12. 9

13. 34 + 44 = 78

14. 101 - 1 = 100

Since the leading degree of the resulting expression is 2, hence the  polynomial simplifies to an expression that is a quadratic

Polynomial expressions are expressions that has a leading degree of 3 and above.

Given the expression

(-5x² - 2x + 4) + (8x² - x - 1) - (x+2)(x-5)

Expand the polynomial

(-5x² - 2x + 4) + (8x² - x - 1) - (x² -3x - 10)

Collect the like terms

-5x² + 8x² - x² - 2x - x + 3x + 4 - 1 + 10

2x²  + 13

Since the leading degree of the resulting expression is 2, hence the  polynomial simplifies to an expression that is a quadratic

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Answer:

I cant tell what u mean but if the angles are equal the answer is 10

Step-by-step explanation:

Based on the calculations, the value of x is equal to 42.5.

Given the following data:

To determine the value of x:

A supplementary angle can be defined as two (2) angles or arc whose sum is equal to 180 degrees.

Mathematically, a supplementary angle is calculated as follows:

[tex]Angle\;2+Angle\;4 =180\\\\3x-5 +x+15=180\\\\4x+10=180\\\\4x=180-10\\\\4x=170\\\\x=\frac{170}{4}[/tex]

x = 42.5.

Read more on supplementary angle here: brainly.com/question/10335289

Answer:

w = 10π

w ≈ 31.4159

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Equality Properties

Step-by-step explanation:

Step 1: Define

4π = w - 6π

Step 2: Solve for w

Answer and Step-by-step explanation:

4[tex]\pi[/tex] = w -6[tex]\pi[/tex]

Add 6[tex]\pi[/tex] to both sides.

10[tex]\pi[/tex] = w

(10 pi equals variable w)

This is your answer.

#teamtrees #WAP (Water And Plant)

Answer:

Yes.  There can be 56 games (92%) of Exploding Snap every evening throughout September and October that can be played without having the same three Gry ndors play a game twice.

Step-by-step explanation:

This is a combination game without repetition.

The formula for combination without repetition is:

n! /r! (n - r)!

where n = 8 and r = 3

Therefore, n! /r! (n - r)!

= 8! / 3! (8 -3)!

= 40,320 / 6 (120)

= 40,320 / 720

= 56

There are 30 nights in September and 31 nights in October, totaling 61 nights

This implies that 56/61 games can be played in these two months without repeating the same three gamers.

56/61 = 0.918

= 92%

Answer:

the smallest number of equally sized pieces is 20

Step-by-step explanation:

The computation of the smallest number of equally sized pieces is as follows:

Given that

The sum of 1 by 5 and 3/4

Now

if we sum it

= 1 ÷ 5 + 3 ÷ 4

= 4 + 15 ÷ 20

= 19 ÷ 20

Now as if we do the lcm so the denominator sum be 20

Therefore the smallest number of equally sized pieces is 20