Mathematics High School

find the solution to the following system of equations using substitution or elimination​

Find The Solution To The Following System Of Equations Using Substitution Or Elimination

Answers

Answer 1

Answer:

D. (2,-3)

Step-by-step explanation:

if you substitute 2 for the x value and -3 for the y value in both equations, it works out.

instead of y=3x-9 it would be -3=3(2)-9.

you solve and get -3=-3, so it's a solution.

and instead of y=-2x+1 it would be -3=2(2)+1. after solving it, you would get -3=-3 again, so it works for both equations.

Related Questions

A chemical compound requires 8 ounces of chemical A and 12 ounces of chemical B. A mixture contains 24 ounces of chemical A and 30 ounces of chemical B. How can you fix the mixture to make the chemical compound?

Answers

Add 6oz of chemical B and remove 1/3 of the total mixture.
I might always be wrong.
Explanation:
Since 8x3=24 and since 12x3=36 you need to add 6oz of chemical B to have 24oz of chemical A and 36oz of chemical B.
Take 1/3 of the total mixture to have 8oz of chemical A and 12oz of chemical B.

Riley has $14 more than Ashton. Peyton has twice as much money as Riley. If Ashton has m dollars, which expression represents the amount of money that Peyton has?

Answers

Answer:

14 times 2

Step-by-step explanation:

2(m+14) because I got big brains trust me

im begging yall please help me!please?

Question-Susan works for the school newspaper and wants to conduct a survey to ask students whom they will vote for in the upcoming School actions which example should she choose to best represent the entire population ?

Answers

B- asking every tenth student has an advantage of asking more people

W-20.5=8 please help me

Answers

This is just the same as asking you what number when subtracted by 20.5 will give you an answer of 8. The answer would obviously be 8+20.5=28.5 so w=28.5.

We can also do it in a more algebraic way. By adding 20.5 to both side of the equation which won't change the value.

w-20.5+20.5=8+20.5

w=28.5

Any questions just ask me in the comments of this question :)

which equation represents the line that passes through the point (-1 -2) and (3 10)

Answers

Answer:

the answer is y = 3x + 1

Write the numerical expression in words.
(10-1) divided by 3
10+(5-3)
(7+3)x5

Answers

Step-by-step explanation:

ten minus one divided by three

ten plus five minus three

seven plus three times five

find the value of 9x+4y when x=4 and y=-3

Answers

Answer:

you substitute x for 4 and so you multiply 9 x 4 which will give you 36 and then you have to add four times y so you substitute y for -3 and you add 36 - 12 which will give you 24

Whats 3/7 multiplied by 14/18.Make sure ur answer is fully reduced.​

Answers

Answer:

1/3

Step-by-step explanation:

3×14 = 42

7×18 = 162

simplify by dividing them each by 42 and you get 1/3

Answer:

1/3

Step-by-step explanation:

just multiply per usual then reduce it

What is an equivalent fractions

Answers

Answer:

fractions that are the same

IF 2^x=10 AND 10^y =128 ,find xy

Answers

Answer:

Your answer is

XY= 7

Hope that this is helpful. Tap the crown button, Like & Follow me

What is the result when the number 80 is decreased by 32%?

Answers

Answer:

54.4

Step-by-step explanation:

Answer: 54.4

Step-by-step explanation:

Subtract 32% from a 100% then multiply it by 80 to get the results.

100% - 32% = 68%

68% * 80 = 54.4

Explain how you will apply the 45 - 45 - 90 to a right triangle with a leg that's measured 12?

Answers

Answer:

Step-by-step explanation:

1.How to find the longer leg of a 45 45 90 Triangle?

ans : If you know the length of one of the legs of a 45-45-90 triangle, the other leg has the same length. For this triangle, the other leg has a length of 8*sqrt(2) units. The hypotenuse's length can be found by multiplying the leg's length by sqrt(2).

3n + 1 for n= 2
PLEASE HELP

Answers

Answer:7

Step-by-step explanation:

3(2)+1

6+1=7

Answer: 7

Step-by-step explanation:

if n=2 then

3*2+1

3*2=6

6+1=7

Bobby is 5 less than Kylie's age. Their combined
age is 43. How old is Kylie?

Answers

Answer:

Kylie is 24 years old

Step-by-step explanation:

kylie = x

Bobby=x-5

x+x-5=43

2x-5=43

2x=43+5

2x=48

X=24 years old

19

If you subtract 5 off of 43 and divide it by two you find Kylie's age. The reason you divide by two is because there are two people and it is a combined age, meaning you would divide by two.

-Ɽ3₮Ɽ0 Ⱬ3Ɽ0


What is the c-value for the data point that represents the outlier in the scatter plot?
0 195
0 190
0 170
0 160

Answers

The answer is the first one. 195 is the x value for the data point that represents the outlier in the scatter plot.

Winner gets a thanks and brainliest

Answers

Answer:

7/17

Step-by-step explanation:

8/17 + 2/17 = 10/17

17/17 - 10/17 = 7/17

mhhhhhhhhhh welppp i need help

Answers

Answer:

It does not pass the vertical Line test, because the vertical line test is when you put a line through a something like this circle and if it passes throug it more the once it is not a line.

Step-by-step explanation:

Hope this help.

no it doesnt pass the vertical line test

K12 Math What was the "phrase that pays" EXACTLY as written in the Unit 2 Practice Test Desmos lesson?

Answers

Answer:

never stop learning

Step-by-step explanation:

all lower case

i took the k-12

Find the unknown number. Enter your answer in simplest form.
9/10 - ? = 1/2 ?

Answers

Answer:

well its 2/5

Step-by-step explanation:

because its 4/10 but you wanted to simplify it so its 2/5

brainlist? its the crown btw

Answer:

? = 2/5

Step-by-step explanation:

Lets say '?' is 'x'First change 1/2 to 5/10 Now, subtract 9/10 from 5/10. You should get -x = -4/10Now divide the equation by -1 so x=4/104/10 is the same as 2/5, which is the answer

Whoever answers this question first gets brainly 2

Answers

Answer:

J

Step-by-step explanation:

Answer:

F. 80

Step-by-step explanation

12/180 = 1/15

1200/15 = 80

What is the answer PLSSSSSSS HELP

Answers

Use photomath it will help you

hiii please help i’ll give brainliest and please write how you got the answer

Answers

Answer:

385

Step-by-step explanation:

11  / 4 2 3 5

−__ 0___        

   4 2          

−__3__   3_        

     9 3        

  −__8___8__    

       5 5      

     −____5_ 5___    

         0 0    

       −_______0__  

           0 0  

         

Please help!!
Mr. Sanchez’s class sold fruit pies for $1.65 each and Mr. Kelly’s class sold bottles of fruit juice for $1.36 each. Together, the classes sold 79 items and earned $118.17 for their school.

(a) Write and solve a system of equations that model the problem. Show all your work.

(b) Which class earned more money?

(c) How much more money did that class earn?

Answers

Answer:

Step-by-step explanation:(a)

1.65p+1.36j=118.17 and p+j=79

We can say p=79-j and sub this value in first equation

1.65(79-j)+1.36j=118.17

130.35-1.65j+1.36j=118.17

-0.29=-12.18

j=42, p=79-j, p=79-42=37

(b)

1.65(37)=61.05 and 1.36(42)=57.12

Sanchez class earned more selling pies.

(c)

61.05-57.12=3.93

So Sanchez class made $3.93 more than Kelley class.

Some one already answered this, heres the link to the answer:

brainly.com/question/19662350?referrer=searchResults&exp=25-1

If a/b
and c/d
are rational expressions, then a/b*c/d=a*d/b*c.
A. True
B. False

Answers

Answer:

True

Step-by-step explanation:

Promise Just toke the test

Answer:

it is true have a good day

Can someone answer this question this correctly for me

Answers

The answer is A cause thoes are the ones u don’t have a number for yet

During the economic downturn in 2008, the price of a stock, A(x), over an 18-month period decreased and then
increased according to the equation A(x) = 0.70x2 - 6x + 15, where x equals the number of months. The price of
another stock, B(x), increased according to the equation B(x) = 2.75x + 1.50 over the same 18-month period. State all
prices, to the nearest dollar, when both stock values were the same.

Answers

Answer:

(-2) + (3-7)

(-1) * (-2)

EVALUATE THE EXPRESSION

Step-by-step explanation:

HELP ME PLS

Steven read 2 12 of the 8 books he
checked out from the library. What
percent of his library books did
Steven read?

Answers

Answer:

1.33 percent of his 8 books.

Step-by-step explanation:

Assuming you mean [tex]\frac{2}{12}[/tex] , that equates to 1.33 percent of 8, thus he has read one whole book and is reading his second one.

7p - 8 = -22
A- p=2
B- p=-2
C- p = 15
D- p=-15

Answers

the answer would be -2 because you subtract 8 from -22 and it gives you -14 and then you divide across 7 to -14 and it gives you -2

brainliest ?
The answer for the equation 7p - 8 = -22
Is B- p= -2

Which triangle is a 30°-60°-90° triangle?
10
O
5,3
15
5
5/5
10
5
10/3
15
10
5./3

Answers

Answer:

the first one

Step-by-step explanation:

2 +7 +4(9 - 6)2 = 6

PLEASEE I NEED HELP

Answers

Answer:

It is false

Step-by-step explanation:

Because 2+7+4x3 2 =33 not 6

2+7+24 =6

33=6

Answer:

your mum, lol

Step-by-step explanation:

someone already did it might as well put random comment

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