Can someone please explain system of equations to me?
I’m struggling

Answers

Answer 1
System of equations is like subtracting and substituting two or more equations! For example, if there are two equations:
2x+5y=19
-2x+3y=2
You would subtract the two equations straight across to eliminate one of the variables (either x or y). Because -2 and 2 are opposites of each other, if you add them, they equal zero, which leads to you eliminating a variable! Then, you would add 5y+3y=8y and 19+2=21 and then do 8y=21 and you get your answer for y, which in this case is 21/8.

If you want to find the x value next, you would plug in your y value into the equation and solve for x! Example:
2x+5(21/8)=19!

Related Questions

Jane has 4 more jelly beans than Dan. If Jane has 13 jelly beans, how many jelly beans does Dan have

Answers

Answer:

Dan would have 9 jellybeans.

Step-by-step explanation:

Since Jane has 4 more, all we have to do is subtract 4 from 13 to get the answer, 9.

Is a triangle with the sides of 32, 60, and 68 a right triangle?

Answers

In order for a triangle to be considered a right triangle, one of the sides must be 90°. In this case, the triangle is not because none of the three sides equals 90°

The midpoint of PQ is M(5, 7). One endpoint is P(2, 5). Find the coordinates of the other endpoint Q.

Write the coordinates as decimals or integers.
Q = ( , )

Answers

(8,9)

Step-by-step explanation:

5=2+X/2

10-2=X

8=X

7=5+y/2

14=5+y

14-5=y

y=9

(8,9)

Which system of equations has no solution? HELP ASAP!!!!!!

Answers

i believe it’s the last one since it’s parallel and they will never meet, meaning no solution.

Answer:

its the 4th one is the answer

How come by the 56 pound bag of black beans and 3/4 pound bag of pinto beans how many pounds of beans is Malcolm By in all?

Answers

Answer:

it is 42 pounds of beans that Malcolm has

Which are solutions of the linear equation?
Select all that apply. 3x + y = -10




(-1, -6)
(-2 -4)
(-3,1)
(-4. 3)
(-5. 5)

Answers

Answer:

The answer is (-5,5).

Step-by-step explanation:

y = 10 - 3x

Substitute the options you get 5 for y which makes (-5,5) the answer.

The volume of this right circular cylinder is 64π cubic yards. If h, the height of the cylinder, is 4 yards, what is r, the radius of the base?

Answers

Answer:

h = 4 cm

Step-by-step explanation:

The formula for volume of a cylinder is

V = πr²h      where V is the volume, r is the radius, and h is the height.

We are given V = 64π, and r = 4, plug those in and solve for h

64π = π(4²)h

64π = 16πh

(64π)/(16π) = (16πh)/(16π)      (divide both sides by 16π)

4 = (16π)/(16π)h

 4 = h

Answer:

Radius = 4 yards

Solution:

Here, we are provided a right circular cylinder with :

Volume = 64 π cubic yards Height = 4 yards Radius = ?

We know that :

[tex] \quad\hookrightarrow\quad{\pmb{ \mathfrak { Volume = \pi r^2 h }}}[/tex]

Therefore,

[tex] \implies\quad \sf{V = \pi r^2 h }[/tex]

[tex] \implies\quad \sf{64\pi = \pi r^2 \times 4 }[/tex]

[tex] \implies\quad \sf{ \pi r^2 \times 4 = 64\pi}[/tex]

[tex] \implies\quad \sf{r^2 =\dfrac{64\pi}{\pi \times 4} }[/tex]

[tex] \implies\quad \sf{ r^2 =\dfrac{\cancel{64}}{\cancel{4}}\times \cancel{\dfrac{\pi}{\pi}}}[/tex]

[tex] \implies\quad \sf{ r^2 = 16}[/tex]

[tex] \implies\quad \sf{r=\sqrt{16} }[/tex]

[tex] \implies\quad \underline{\underline{\pmb{\sf{r= 4}}} }[/tex]

1. The diagram shown is two intersecting lines. The measure of (5 is 47°.



(a) What is the measure of {7 ? How do you know. Explain your answer in complete sentences.

(b) Suppose the measure of {6 can be represented by (2x-5) . What equation can be written to solve for the value of x?

(c) What is the value of x?

Answers

By using what we know about intersecting lines, we will see that:

a) ∡7 = 47°b) 47° + (2x - 5)° = 180°c) x = 69

How to get the measures of the angles for two intersecting lines?

When two lines intersect, 4 angles are formed. There are two properties that these angles have.

If the angles are adjacent, then their measures add up to 180°If the angles are not adjacent, these angles have the same measure.

a) We know that ∡5 = 47°

And 7 is not adjacent to 5, then 7 has the same measure:

∡7 = 47°

b) 6 and 5 are adjacent, then we must have that:

∡5 + ∡6 = 180°

47° + (2x - 5)° = 180°

That is the equation we need to solve to get the value of x.

c) To solve the linear equation we need to isolate x, let's do that:

47° + (2x - 5)° = 180°

(2x - 5)° = 180° - 47° = 133°

2x - 5 = 133

2x = 133 + 5 = 138

x = 138/2 = 69.

If you want to learn more about linear equations, you can read:

https://brainly.com/question/1884491

John earns an 8% commission for each television he sells. If John sells a television for $700, how much commission will he earn?

Answers

Answer:$56

Step-by-step explanation:

x/700 = 8/100

(8)700 = 5,600

5,600/100 = 56

Solve for x


thank you

Answers

Answer:

x = 28

Step-by-step explanation:

(x + 9)° + (2x + 5)° + (3x - 2)°= 180°

(6x + 12)° = 180°

[tex]6x=180-12[/tex]

[tex]x =\frac{168}{6} =28[/tex]

Hope this helps

4 /5 fraction can be rewritten as _____

Answers

Answer:

8/10, 12/15, 16/20 and so on

Step-by-step explanation:

4x2/5x2 = 8/10
4x3/5x3 = 12/15
4x4/5x4 = 16/20 and so on

The area of a square-shaped rug is 144 ft^2. What is the perimeter, in feet, of the rug?

Answers

Answer:

48 feet

Step-by-step explanation:

The rug is a square so that means that the sides are going to be the same length. 12*12 = 144 so the lengths of the sides are 12 feet. 12+12+12+12 = 48

hope this helped! :)

Answer:

I might be wrong but I believe the answer is 48 ft.

Step-by-step explanation:

Bailey toss a coin 20 times. The results were 12 heads and a tails. What statement accurately compares the theoretical and experimental probability of tossing tails?

I need this tonight will give Brainlyist to right answer!!

Answers

I’m assuming that talks were tossed 8 times. The experimental probability is 8/20 and the theoretical probability is 10/20.

What is the value of x?
to
x = [?]°
o

Answers

Answer:

The value of x from the figure is 58 degrees

To get the value of x, we will use the formula:

The angle at the vertex = 1/2(difference of angles at the arc)

Angle at the vertex = 1/2(160 - x)

51 = 1/2(160 - x)

102 = 160 - x

x = 160 - 102

x = 58 degrees

Hence the value of x from the figure is 58 degrees

which is bigger 0.2,1/2 or 2%

Answers

Answer:

See below.

Step-by-step explanation:

0.2, 1/2, 2%

Convert the other two to decimals to make our lives temporarily easier.

1/2 = 0.5

2% = 0.02

0.2, 0.5, 0.02

The greater term is 0.5, or 1/2.

-hope it helps

Answer:

1/2

Step-by-step explanation:

0.2 = 0.2

1/2 = 0.5

2% = 2/100 = 0.02

From smallest to biggest:

2%, 0.2, 1/2

Answer: The biggest one is 1/2

Find x plissssssssssssss

Answers

I believe the answer is 5, im pretty confident in that.

)) of the students in Brody's grade, 30 students have a pet and the other 47 students do not.
What is the ratio of the number of students who do not have a pet to the number of students who
have a pet?

Answers

Answer:

Given

students have a pet = 30students do not have a pet = 47

Let number of students who have a pet denoted by "X" And number of students who do not have a pet denoted by "Y"

Step-by-step explanation:

Ratio of students who have a pet = [100 - (X/Y * 100)]

Ratio of students who have a pet = [100 - (30/47 * 100)]

Ratio of students who have a pet = [100 - (67.8)]

Ratio of students who have a pet = 36.2


What is the surface area of the box, in square feet, that Zoey decorates?

Answers

Answer:

should be 1006

Step-by-step explanation:

Jaq ueline has 15 cookies to share with her study group. If there are 4 kids in the group and they want to split the cookies evenly they are even willing to cut a cookie if they need to. how many cookies will each person get?​

Answers

Answer:

Each person can get 3 3/4 cookies.

Indicate if the following would result in a random sample or a biased sample

Use a pattern, such as selecting every fourth person who enters the cafeteria

A. biased
B. random

Answers

Answer:

biased

Step-by-step explanation:

i took the test and I got it right

The graph of f(x) = x2 is translated to form g(x) = (x – 5)2 + 1. On a coordinate plane, a parabola, labeled f of x, opens up. It goes through (negative 2, 4), has a vertex at (0, 0), and goes through (2, 4). Which graph represents g(x)? On a coordinate plane, a parabola opens up. It goes through (2, 10), has a vertex at (5, 1), and goes through (8, 10). On a coordinate plane, a parabola opens up. It goes through (2, 8), has a vertex at (5, negative 11), and goes through (8, 8). On a coordinate plane, a parabola opens up. It goes through (negative 8, 10), has a vertex at (negative 5, 1), and goes through (negative 2, 10). On a coordinate plane, a parabola opens up. It goes through (negative 8, 8), has a vertex at (negative 5, negative 11), and goes through (negative 2, 8).

Answers

Answer:

The option which is:

On a coordinate plane, a parabola opens up. It goes through (2, 10), has a vertex at (5, 1), and goes through (8, 10).

Step-by-step explanation:

At first we should know the rules of translation

1) {f(x) + a} is f(x) shifted up (a) units

2) {f(x) – a} is f(x) shifted down (a) units

3) {f(x + a)} is f(x) shifted left (a) units.

4) {f(x – a)} is f(x) shifted right (a) units.

Given:

f(x) = x²

g(x) = (x-5)² + 1

By comparing [ the translation from f(x) to g(x) ] with the rules of translation

We can deduce that g(x) is the image of f(x) by translation 5 units right and 1 unit up ( rules 1 and 4)

See the attached figure which represent the graph of f(x) and g(x)

As shown g(x) goes through (2, 10), has a vertex at (5, 1), and goes through (8, 10)

PLEASE HELP ME!!!
Solve in substitution form step by step please

Answers

Answer:

3. (3,-4)

Step-by-step explanation:

solve for a: a^2/3 = 25

Answers

Answer:

125

Step-by-step explanation:

a⅔=25

2/3root each you get root 2/3of 25

Hurry please
Write the equation of a line PERPENDICULAR to the line y = 3x + 2 that passes through
the point (9,-2)
A. y=-1/3x +1
B. y=-1/3x-5
C. y=1/3x-5
D. y = 3x-29

Answers

Answer:

y=3x-7

Step-by-step explanation:

To find the equation of a perpendicular line, you first need to find the negative reciprocal of the slope given. The slope is -1/3, so the slope of the perpendicular line will be 3

Now we just need to find the y intercept using the point (3, 2) and you can plug the coordinates in and then solve for b. Let's see what that looks like.

y=3x+b

2=3*(3)+b

2=9+b

-7=b So now we know the y-intercept and slope. We just put them together now

y=3x-7

Hope this helps!

Given that, 2x^3 + 5x^2+7x + 23 = A(x+1)^3+ B(x + 1)^2 +Cx+ 22 for all values of x, evaluate A, B and C. Hence, state the remainder when 2x^3 +5x^2 + 7x+23 is divided by x^2 + 2x +1.​

Answers

Answer:

A = 2

B = -1

C = 3

remainder= 19

Step-by-step explanation:

A(x+1)³ + B(x+1)² + Cx + 22 =

A(x³ + 3x² + 3x + 1) + B(x² + 2x + 1) + Cx + 22 =

Ax³ + (3A + B)x² + (3A + 2B + C)x + (A + B + 22) =

2x³ + 5x² + 7x + 23

A = 2

3A + B = 5 → 3(2) + B = 5 → B = 5 - 6 → B = -1

3A + 2B + C = 7 → 3(2) + 2(-1) + C = 7 → C = 7 - 6 + 2 →

C = 3

remainder :

(2x³ + 5x² + 7x + 23 )/ (x² + 2x + 1) =

(2x³ + 5x² + 7x + 23 )/ (x + 1)²

(x + 1)² = 0 → x = -1

2(-1)³ + 5(-1)² + 7(-1) + 23 = -2 + 5 - 7 + 23 = 19

QUICK whoever gives correct answer will get brainliest please and thank you.​

Answers

Answer:

D

Step-by-step explanation:

A genre is something like historical fiction, fantasy, science fiction, etc. Answer D establishes the story as being a fantasy. The other 3 answers show elements that could be included in any story but don't narrow down the story's genre.

what is the quotient of 5/4?
(I'll give brainliest if you answer, thanks!<3)​

Answers

Answer:

1 1/4

Step-by-step explanation:

5/4 = 1.25

As you can see 1 is the whole

1 divide by .25 = 4

Thus, 1 1/4

[tex]\frac{5}{4}=1\frac{1}{4}[/tex]

~Learn with Lenvy~

1.25 is the quotient when 5 is divided by 4.

What is Division?

A division is a process of splitting a specific amount into equal parts.

In division, the dividend( the number being divided) is divided by the divisor (the number you are dividing by) to get the quotient (the result of the division).

In this case, the dividend is 5 and the divisor is 4.

So, 5 divided by 4 is equal to 1.25:

Five divided by four equal to one point two five.

5 ÷ 4 = 1.25

Hence, 1.25 is the quotient when 5 is divided by 4.

To learn more on Division click:

https://brainly.com/question/21416852

#SPJ2

Factor completely 8x2 − 4x − 84. 4(2x − 3)(x 7) 4(2x 3)(x − 7) 4(x − 3)(2x 7) 4(x 3)(2x − 7).

Answers

The factor of the given equation  [tex]8x^{2} -4x-84[/tex] will be  [tex]4(x+3)(2x-7)[/tex]

What will be the factor of the given equation?

Given equation is [tex]8x^{2} -4x-84[/tex]

Now taking 2 commons from the equation

[tex]4(2x^{2} -x-21)[/tex]

now splitting the equation we get

[tex]4(2x^{2} +6x-7x-21)[/tex]

[tex]4(2x(x+3)-7(x+3))[/tex]

[tex]4(x+3)(2x-7)[/tex]

Thus the factor of the given equation  [tex]8x^{2} -4x-84[/tex] will be  

[tex]4(x+3)(2x-7)[/tex]

To know more about Factors of quadratic equation follow

https://brainly.com/question/1214333

a can of pepsi has a radius of 1.3 inches and a height of 4.8 inches find the volume of the cans

Answers

Answer:

Approximately 25.48

Step-by-step explanation:

V = πr²h

V=πr2h=π·1.32·4.8≈25.4846

V ≈ 25.48

Factor the expression below.

15x3+10x2

Answers

Answer:

5 x 2 ( 3 x + 2 )

Step-by-step explanation:

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