HELP AGAIN PLEASE 20 POINTS What methods can be used to solve a system of equations and when would you use each? Be sure to include systems with nonlinear equations.

Answers

Answer 1

Answer:

The three ways to solve a system of equations are substitution, elimination, and graphing. You can use these methods to solve any system of equations, it just depends on which method you use.

Step-by-step explanation:

In the substitution method, you get one variable isolated on one side of an equation, then use that equation to substitute the variable with what it's equal to into the second equation to solve the equation.

In the elimination method, you get all the variables in your equations together one side, and the constant on the other. Then, multiply or divide one or two equations to get one variable with the same coefficient for both equations (be sure to multiply or divide both sides to each equation), and add or subtract the equations together to get rid of that variable (make sure to add the left sides of the equations together and the right sides of the equations together, no the opposite!) and solve the equation.

In the graphing method, you solve for y in each equation, graph both equations on a coordinate plane, and find the point of intersection for both lines to solve the equation (For example, if the point of intersection is (2, 7), the answer to your equation would be X = 2 and Y = 7).

Related Questions

Encuentra las soluciones de las siguientes ecuaciones:
a) 8x -(2-3x) = 18
b)12-(4x - 6) = 5x
c)4. (x + 3) - (1 - x)= 1
d)3. (2x - 1) +21=5. (3x - 2) + 1
e)-2(x + 6) + 2 = -4- (10-2x)

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Answer:

Step-by-step explanation:

a.27.9

b. -13

Corey invested $800 in a CD at a simple interest rate. After 24 months, his account was worth $1000.

How much interest did he earn?

What was his interest rate?

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Answer:

made 25%

Step-by-step explanation:

katie is using fabric to create skirts for her friends each skirts uses 5/6 a yard of fabric how much fabric does she need to create 9 skirts

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Answer:

10.8

divide 9 by 5/6

Which type of loan is similar to a credit card, where the lender sets the
maximum amount that you can borrow based on your equity in the home?
A. Equity
B. A second mortgage
O c. An amortization
D. An equity line of credit

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Answer: B

Step-by-step explanation:

Answer:

A second mortgage

guys u realy need help on this pls

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Answer:

x>9

Step-by-step explanation:

[tex]7-\frac{2}{3} x[/tex]<x-8

21-2x<3x-24

5x>45

x>9

Please help me on this or give me the answer!

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Answer:

i agree with he or she they are correct as well

Step-by-step explanation:

Write an equation of the line passing through the given points.
(3,-25) and (-3,5)

y=

Answers

Answer:

y = -5x -10

Step-by-step explanation:

This is the slope-intercept form:

[tex]y-y_{1} = m(x -x_{1})[/tex]

First, we look for the slope. The slope is found by using the equation:

[tex]m = \frac{y_{2}-y_{1} }{x_{2} -x_{1}}[/tex]

[tex]m = \frac{5 - (-25)}{-3 - 3} = \frac{30}{-6} = -5[/tex]

m = -5.

Now, given the two points, our y₁ is -25, and our x₁ is 3. Therefore, we substitute these values into the equation, and get:

y - (-25) = -5(x - 3)

y + 25 = -5(x - 3)

y + 25 = -5x + 15

y = -5x + 15 -25

y = -5x -10

Answer:

the answer to the problem is y= -5x - 10

Find the value of x so that the ratios are equivalent.
3:x and 12:40
X=
help pls

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Answer:

Step-by-step explanation:

Divide both sides by 4

Evaluate the expression when x = 28 and y=5. x-3y

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Answer:

Step-by-step explanation:

Substitute x for 28 and y for 5:

(28) - 3(5)

28 - 15

last one for todayy lolz

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it should be A. not 100% sure since i haven’t done this in awhile but it makes the most sense lol

Answer:

Step-by-step explanation:

A, to reflect in the y axis we take the negative x value and keep the y the same.

if my answer helps please mark as brainliest.

PLEASE HELP ASAP!!!!!!! Which expression is equivalent to the expression m divided by n, where m and n are integers and n≠0
A) −m/n
B) m/−n
C) −m/−n
D) −(−m/−n)

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The answer D seems to be correct

I was on Brainly and it is b

heeeeeeeelppppppppppppp
plz
plz
i will mark you brill please just if you help

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Use the picture for reference, label all the numbers down 1-23, and for each number that is on the list put a dot, so for number 1 it would have 2 dots above it because there are 2 number 1’s in the list. And so on.

The answer is in the image I have attached, hope it helps.

If an organism has 35% of cytosines, how
many adenines will it have?
35%
15%
25%

Answers

Answer:

Unknown

Step-by-step explanation:

Since you have 35 C, you will have 35 G. Without knowing the number of thymine, the number of adenine is unknown .

That is all the information you can get from this. Just because there are 35 C and G, there doesn't have to be an equal number of A and T

Answer: 15%

Step-by-step explanation: I just did it

PLS HELP! WILL GIVE BRAINLIEST!

A test is worth 60 points. Multiple choice questions are
worth 2 points, and
short-answer questions are worth 5 points. If the test has
15 questions, how
many multiple-choice questions are there?

A. m+ s = 60
B. m+ s = 15
C. m:s= 15
D. 2m + 5s = 15

Answers

Answer:

2m + 5s = 15

I hope it helps.

have a great day.

1) Find the x-coordinate of the vertex, y-coordinate of the vertex, and the z-
intercepts.
y= 22 +42-5
3-coordinate of vertex f
y-coordinate of vertex c
* -intercepts d
a. = 5:0 = -1
b. -5 = 1
c. 2
d. 7
e. -2
f. -9

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Answer:

b is the answer i think

Step-by-step explanation:

I learned this at some point

Graph y=2x -7 NEED HELP

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Answer:

Step-by-step explanation:

Determine whether the ratios 1:2 and 3:4 are equivalent

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They aren’t hope I helped u

Answer:

They are not equivalent

Step-by-step explanation:

1:2 is the same as 2:4

2:4 does not equal 3:4

2. Which expression is equivalent to 5-(-8)?
A (-5) + 8 B 8+5
C 8-5
D 5-8

Answers

B) 8+5
because when to negatives are together it forms a positive

B - 8+5 because two negatives make a positive

An equation is modeled.

What value of x makes the equation true?
(MATH HELP) 7TH GRADE MATH

Answers

Answer:

Step-by-step explanation:

(-1)x5= -5

-5+6=1

Answer:

The answer is C.

Step-by-step explanation:

help pls ! ASAP
Erin recycles milk bottles, soda cans, and newspapers. If the following items are in the trash bin, what percent of the items can be recycled?
6 milk bottles, 1 banana peel, 4 newspapers, 4 soda cans, 5 apple cores

A.
40%
B.
14%
C.
100%
D.
70%

Answers

Answer:

i think its 70 percent

Step-by-step explanation:

How many tons are equal to 48,000 pounds?
4 tons
24 tons
240 tons
2,400 tons

Answers

Answer:

24 tons

Step-by-step explanation:

Have a great day!!

The Answer is 24

Hope this helps<3

Two drawings are given below. Drawing 2 is a scale drawing and Drawings 1 is an original drawing.

The length of the bottom side of Drawing 2 is ______ cm. please help

Answers

Answer: 7.95

Explanation:

Find scale factor:

Scale factor = small length/larger length

Scale factor = 5.3/13

Find the bottom side of drawing 2:

19.5 x 5.3/13 = 7.95

In a cheese factory, 4.5-kg blocks of cheese are cut manually. For a large number of blocks, the standard deviation of the cutting process is measured and found to be 0.10 kg. The measurement was done with a scale with an accuracy of 1.5% of the full scale of 12 kg. Calculate the total uncertainty of the weight of the blocks of cheese at a 95 % confidence level.

Answers

Answer:

0.2690 kg

Step-by-step explanation:

Given that:

For cutting a 4.5 kg block of cheese; the standard deviation:

[tex]S_x = 0.1 \ kg[/tex]

For a large no of blocks, at 95% confidence level;

Using the t table; where the degree of freedom is infinity or > 30

t-distribution (t) = 2

∴

[tex]P_x = tS_x[/tex]

[tex]P_x = 2 \times 0.1[/tex]

[tex]P_x = 0.2 \ kg[/tex]

The system uncertainty as a result of the accuracy [tex]B_x[/tex] is:

[tex]B_x = 1.5\% \ of \ reading[/tex]

[tex]B_x = (\dfrac{1.5}{100})(12 kg)[/tex]

[tex]B_x = 0.18 \ kg[/tex]

The total uncertainty for a single experiment with a 95% confidence interval will be:

[tex]w_s = ( B_x^2 + P_x^2)^{\frac{1}{2}[/tex]

[tex]w_s = (0.18^2 + 0.2^2)^{\frac{1}{2}[/tex]

[tex]\mathbf{w_s = 0.2690 \ kg}[/tex]

Help me please, 1. And 2.

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Answer:

Step-by-step explanation:YOU HAVE TO SHOW ME THE WHOLE THING SO THAT I CAN ANSWER IT DUH

Somebody pls help I need help wit my homework!!!!

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Step-by-step explanation:

(3,4) would be the answer

Yeah- I need help please
-3r - 13

r = 2

Answers

Answer:

The answer should be -19

Step-by-step explanation:

-3r - 13 = ?

-3(2) - 13 = ?

-6 - 13 = ?

-19 = ?

Solve the system of equations:

y=5x+3
2x+6y=50

Answers

x = 1 and y = 8 so (1,8) would be the correct answer

Hal earns n dollars per hour. Next month he
will receive a 296 raise in pay per hour. The
expression n +0.02n is one way to represent
Hal's pay per hour after the raise Write an
equivalent simplified expression that will
represent his pay per hour after the raise.

Answers

Answer:

[tex]Total = 1.02n[/tex]

Step-by-step explanation:

Given

[tex]Earnings = n[/tex]

[tex]Raise = 2\%[/tex] --- not 296

[tex]Total = n + 0.02n[/tex]

Required

Simplify the expression for total earning

The total amount is derived from:

[tex]Total = Earnings + Raise * Earnings[/tex]

[tex]Total = n + 2\% * n[/tex]

Express percentage as decimal

[tex]Total = n + 0.02 * n[/tex]

Now, we can solve further:

[tex]Total = n + 0.02n[/tex]

[tex]Total = 1.02n[/tex]

Hence, the simplified expression is 1.02n

Answer:

1.02n

Step-by-step explanation:

If the radius of a circle is 3.5 cm, what is the diameter?

Answers

Answer:

Step-by-step explanation:

The diameter is twice the radius, and 2(3.5) = 7.

F(x) = 3x^2 + 6x - 5
g(x) = 4x^3 – 5x^2 + 6
Find (f +g) (c)

Answers

9514 1404 393

Answer:

4c^3 -2c^2 +6c +1

Step-by-step explanation:

We can substitute c for x either before or after we combine the functions.

(f +g)(c) = f(c) +g(c)

(f +g)(c) = (3c^2 +6c -5) +(4c^3 -5c^2 +6)

(f +g)(c) = 4c^3 +c^2(3-5) +6c +(-5+6) . . . . group like terms

(f +g)(c) = 4c^3 -2c^2 +6c +1

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HELP AGAIN PLEASE 20 POINTS What methods can be used to solve a system of equations and when would you use each? Be sure to include systems with nonlinear equations.​

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HELP AGAIN PLEASE 20 POINTS What methods can be used to solve a system of equations and when would you use each? Be sure to include systems with nonlinear equations.