Mathematics High School

-x+y = 5
x - 5y = -9
Solve by elimination
Y and x

Answers

Answer 1

Answer:

x = -4 and y = 1

Step-by-step explanation:

-x + y = 5

+ x - 5y = -9 <— let’s eliminate x

————————————-

-4y = -4

y = 1

x - 5y = -9 <— substitute for y

x - 5(1) = -9

x - 5 = -9

+5 = +5

x = -4

Related Questions

Find the value of x.

Answers

Answer:

        x = 4  

Step-by-step explanation:

DE║AC  ⇒   From Thales:  [tex]\dfrac{BD}{BE}=\dfrac{DA}{EC}[/tex]

Therefore:

                 [tex]\dfrac{10-x}{3}=\dfrac{x}2\\\\2(10-x)=3x\\\\20-2x=3x\\\\20=5x\\\\x=4[/tex]

Find the slope and y-intercept of the line in the graph:

Answers

2 i believe i’m pretty sure

Answer:

Slope: -2/3

Y-intercept: 2

solve the inequality G-13<19

Answers

Answer:

The answer is G < 32

Step-by-step explanation:

G - 13 < 19

(Move numbers to on side)

G - 13 + 13 < 19 + 13

(Simplify)

G < 32

I hope this helps :)

Olivia has a points card for a movie theater. She receives 25 rewards points just for signing up. She earns 7.5 points for each visit to the movie theater. She needs 130 points for a free movie ticket. How many visits must Olivia make to earn a free movie ticket?

Answers

Answer:

14

Step-by-step explanation:

7.5x + 25 = 130

         -25    -25

7.5x = 105  

[tex]\frac{7.5x}{7.5}=\frac{105}{7.5}[/tex]

x = 14

Hence, she must make 14 visits in order to earn a free movie ticket.

Simplify the expression.
3.4m + 9 - 2.4m =blank

Answers

Answer:

m+9

Step-by-step explanation:

Select the solution(s) of log2x=1−log(x+4).

Answers

Step-by-step explanation:

log2x = 1 - log(x+4)

log2x = log10 - log(x+4)

log2x = log[10/(x+4)]

2x = 10/(x+4)

2x(x+4) = 10

2x² + 8x - 10 = 0

÷2 both sides of equation

x² + 4x - 5 = 0

(x+5)(x-1) = 0

x = -5, 1

x isn't be -5 because logA, A need to be > 0

So, x value is 1

Pleasee helpp answer correctly !!!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!!!!!!!

Answers

Answer:

x = 132º

Step-by-step explanation:

the sum of two angles on the same side is 180º so...

x + 48º = 180º            subtract 48º from both sides

x = 132º

I need help can y’all please help me

Answers

The answer for the perimeter is C. 102.61

Which Proportion is correct?

Answers

Answer:

sorry but i need the points <3

Step-by-step explanation:

A plant is already 54 centimeters tall, and it will grow one centimeter every month. The plant's height, H (in centimeters), after M months is given by the following.
What is the plant's height after 13 months?

Answers

Answer:

67 cm

Step-by-step explanation:

We are given the initial height of the plant let's call it H.

H = 54 cm. This is the original height of the plant at M(months) = 0.

We are given that it grows at 1 cm/month. This is the rate of growth.

Rate = 1

Time (M) is given in Months.

So when M = 0, H = 54

Let's say M = 1, That is one month has passed. In this time the plant's height would have increased by 1 cm. So our plant's height would be H = 54+1 = 55 cm.

When Two months have passed our plant's height would be H = 54 + 2 = 56 cm , since every month our plant gains 1 cm in Height, we can make a fuction for this.

H = 1M + 54.

Now we just plug in 13 for M, to get 13 months.

H = 13 + 54

H = 67 cm

So our plant would be 67 cm in height after 13 months.

[Help Asap] For each ordered pair, determine whether it is a solution to the system of equations.

Answers

Answer:

(-4,-4)

Step-by-step explanation:

6x - 7y = 4

6(-4) - 7(-4) = 4

-24 + 28 = 4

4 = 4 This is correct to the first equation.

Now let us try the second equation.

-5x + 3y = 8

-5(-4) + 3(-4) = 8

20 - 12 = 8

8 = 8 This is also correct to the second equation.

Hope this helps, thank you !!

its the pythagorem theorem

Answers

The answer is approximately 16 inches. I attached the work below :) (if this helped u can u give brainlist)

I need help with this

Answers

8/9 divided by 2/3 is 1 1/3

Graph this function using intercepts:

4x - 5y = 40 ​

Answers

use photomath for that that's way easier

i think this is how you do it

I urgently need help!!!!

Answers

Answer:

No

Step-by-step explanation:

Hypotenuse-leg is for right triangles, which these aren't.

PLS HELP ASAP



6x - 8 = 40 pls evaluate

Answers

Answer:

X = 8

Step-by-step explanation:

6 x 8 = 48 - 8 = 40 so 8 is your answer

6x-2y=4
I need to solve the question and then graph it. Help?​

Answers

Answer: if you want me to solve x here if you want me to solve y here, look at the picture

Step-by-step explanation: hope this help

I need help please please

Answers

Answer:

the right answer is three ok your welcome

Answer:

It is option 4

4 + 6 (3) + 2(5 1/2 - 1)

Answers

4+6(3)+2(5.5-1)
4+18+9
=31

Find the geometric mean of the numbers. If necessary, give the answer in simplest radical form.

1.5 and 20

The geometric mean is .

Answers

its the square root of 1.5*20 which is root 30

The Hu family gose put for lunch and the piece of the meal is $56 the sales take on the meal is 7% and the family also leave a 20% tip on the pre tax amount what is the total cost of their meal

Answers

Answer:

$56 x ( 7% + 20% ) = $15.12 => $56 + $ 15.12 = $71.12

Step-by-step explanation:

For what value of x do the expressions
2x+3 and 3x +1 have the same value?

Answers

Set the expressions equal to each other:
2x + 3 = 3x + 1
x = 2

I would love some help :)

Answers

4x+6=3x+10 so x=4, to find the measure of KJL, plug in x into the equation 4x+6. angle KJL=22°

Which of the following inequalities is the solution to the number line?

Answers

Answer:

A

Step-by-step explanation:

- 5x + 4 > 9 ( subtract 4 from both sides )

- 5x > 5

Divide both sides by - 5, reversing the symbol as a result of dividing by a negative quantity.

x < - 1

Which is represented by the given number line

pls answer quickly and right for 17 points

Answers

Answer:

lol it's only 9 points

Step-by-step explanation:

‼️‼️Pls Pls help, this is due soon and I will give brainliest to first correct answer‼️‼️

Which problem will graph as shown
A) -17 < 3 - 5x
B) 17 > 3 - 5x
C) 17 ≥ 3 - 5x
D) 17 ≤ 3 - 5x

Answers

Answer:

where is the graph? i need a graph, otherwise id love to help you!

Step-by-step explanation:

I dont even know how to solve this lol, need help and work shown

Answers

Answer:

-6

Step-by-step explanation:

-7 + 2(5) - (12÷4)²

-7 + 10 - 3²

-7 + 10 - 9

3 - 9

-6

what is...
4 times 8 and add that to 5.6*4/2 +4.5*4/2 plus four times eight

Answers

Answer:

52.2

Step-by-step explanation:

I got 449.6 I have no clue if that’s correct tho

Ms. Bohan has 4 1/2 bags of takis that she wants to split between her 3 nieces. What fraction of the takis will each niece get? 

 a

6/9 of the takis

 b

3 1/2 of the takis

 c

9/6 -or- 1 1/2 of the takis

 d

27/2 -or- 13 1/2 of the takis

​

Answers

C is the correct answer when you divide 4.5 by 3

Plz help tysm and thx

Answers

The 3rd bubble is the answer
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