Mathematics High School

please help, I really don't get this​

Please Help, I Really Don't Get This

Answers

Answer 1

Answer:

-8, -8

Step-by-step explanation:

If you add the equations, you get -7x + 4x + 4y - 4y = 24. Canceling out the 4y and the -4y, and adding 4x to -7x, you get -3x = 24. Divide both sides by -3 and you get x = -8. Next, pick an equation and substitute x for -8. I am going to use the first equation. (-7)-8 + 4y = 24 is equal to 56 + 4y = 24. Subtract 56 from both sides to get 4y is equal to -32, and if you divide both sides by 4, you get y = -8.

Answer 2

9514 1404 393

Answer:

  (-8, -8)

Step-by-step explanation:

We notice that the coefficients of y are +4 and -4, so have a sum of zero. This means we can add the two equations to eliminate the y-terms.

  (-7x +4y) +(4x -4y) = (24) +(0)

  -3x = 24 . . . . . . . . . simplify

  x = -8 . . . . . . . . . . . divide both sides by -3

Now, we can find y using either equation.

  4(-8) -4y = 0

  -8 -y = 0 . . . . . . . . divide both sides by 4

  -8 = y . . . . . . . . . . add y to both sides

The solution to the system of equations is ...

  (x, y) = (-8, -8)

Related Questions

If the measure of angle 1 is 110° and the measure of angle 3 is (2x+10)", what is the value of x?
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1
4
2.
3
50
55
60
Save and Fxit
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Answers

Answer:

X is equal to 50..

Step-by-step explanation:

as angle 1 and 3 are equal

2*50+10

100+10

is 110

so X is 50

Show two different ways to factor pls help
-12x + 24 - 18y

Answers

I know one way can be -6(2x-1) but I’m not sure about any other way

what is the solution to d · -4=32​

Answers

Answer:

-8

Step-by-step explanation:

-4d=32

d=32/-4

d=-8

What's the answer to -5x+8=-4x+9?

Answers

The answer to the equation is x= -1

Answer:

Step-by-step explanation:

-5x + 8 = -4x + 9

-x + 8 = 9

-x = 1

x = -1

What is the tax on a $7.40 item if the sales-tax rate is 8%?

Answers

Answer:

$7.99

Step-by-step explanation:

7.4*0.08 = 0.592 (0.59)

7.4 + 0.59 = 7.99

Answer: I do not know so so so so sorry explanation: Sorry good luck

5.

Write a rule for the linear function in the table.


A. f(x) = x – 4

B. f(x) = x – 5

C. f(x) = 3x

D. f(x) = x + 4

Answers

Answer: my answer.... A. f(x) = x - 4

Answer: all on brainly

f(x) = –4x is a function rule for the table.

Step-by-step explanation: all on brainly

f(x)=x-4 is the answer i believe

Answer :

The function is  

Step-by-step explanation:

Given values in table :

x        f(x)

3         -1

4          0

5          1

6          2

Here we see there is a difference of 4 in the values of x and f(x)

i.e. 3-(-1)=4

or 4-0=4

Similarly 5-1=4

6-2=4

So x-F(x)=4

Adding F(x) -4 both sides

x-F(x) +F(x) -4=4+F(x) -4

We have F(x)= x-4

Step-by-step explanation: someone's brainly answer

A. f(x) = x - 4

What is the image of ( − 3 , − 5 ) after a reflection over the x-axis?

Answers

Answer:

(-3,5)

Step-by-step explanation:

Given the sequence 24, 12, 6, 3......., where x = 1, 2, 3, 4, .........What is the first term? 24 12 6 3

Answers

Answer:

24

Step-by-step explanation:

The first term of any sequence is the term of the sequence that comes first.

Given the sequence of numbers 24, 12, 6, 3...

We can see that the number that comes first is 24. Hence the first term of the given sequence will be 24

help please
− 20 + (−13) − 7 − (+11) + 14 =​

Answers

Answer:

-20+(-13)-7-(+11)+14= -37

Step-by-step explanation:

we make first : +(-13)= -13 then -(+11)=-11

then we calculate all the nb we have

-20-13-7-11+14= -37

A family of four bought 6 bags of peanuts to share equally. If
each bag contained 36 peanuts, how many did each family
member receive?

Answers

Answer:

54

Step-by-step explanation: 36 * 6 = 216

216 divided by 4 = 54

what is the sum of 3 + 6 + 5

Answers

Answer:

The answer is 14

Step-by-step explanation:

3 + 6 = 9

9 + 5 = 14

The answer is 14 this is easy

3/1 + 1/3

What is the answer to this?

Answers

Answer:

10/3, or 3 1/3.

Step-by-step explanation:

3/1 + 1/3

3 + 1/3

9+1/3

10/3, or 3 1/3.

if the slop of the straight line passing through the two points A (4, k) , B (3, 2) is 5, find the value of K

Answers

Answer:

Step-by-step explanation:

*The dashes are the fraction line*

To find slope...

difference between y

-------------------------------

difference between x

2 - k

-------  =  5

3 - 4

3-4 = -1 so...

-1 ( 2 - k ) = 5

k - 2 = 5

k = 7

Hope this helps!

Answer:

2.5 or 5/2

Step-by-step explanation:

Y2-Y1/X2-X1=m

(2-k)/(3-4)=5

(2-k)/-1=5

Multiply both sides by -1

(2-k)/2=-2.5

-k/-1=-2.5/-1

k=2.5 or 5/2

Which decimal is largest?
0.49
0.45
0.48

Answers

Answer:

0.49

Step-by-step explanation:

Answer:

0.49

Step-by-step explanation:

its 0.01 larger than 0.48

its 0.04 larger than 0.45

I need help!! Please the first drop down are (area,diameter,radius) and the second drop down are (1/3,1/2,2,3) and the last drop down are (area,diameter,radius)

Answers

Answer:

The Area of circle is 1/2 times the radius times the circumference.

Hope this helps!!!

2x-y+8z=13
3x+4y+52=18
5x-2y-72=20​

Answers

Answer:

Answer is above (In the image).

Step-by-step explanation:

I am not sure if that is what you were looking for. To convert it to decimals, just input the figures into your calculator.

In my opinion the best way to solve these equations are elimination, therefore I will be giving my answer in this way!

2x-y+8z=13 1️⃣

3x+4y+52=182️⃣

5x-2y-72=203️⃣

We first combine liked terms in equation 2 and 3.

2️⃣turns into 3x+4y=-34 let's call it 2️⃣'

3️⃣turns into 5x-2y=92 let's call it 3️⃣'

Then solve for x

3️⃣'*2

10x-4y=184

3️⃣+2️⃣

13x=150

x=150/13

Now substitute the x back into equation 2️⃣'

3*150/13+4y=-34

450/13+4y=-442/13

4y=-892/13

2y=-446/13

y=-223/13

Now we can substitute this back into 1️⃣ to solve for z

2*150/13- - 223/13+8z=169/13

523/13+8z=169/13

8z=-354/13

4z=-177/13

z=-177/52

This problem is kind of messy so let me restate my answer!

x=150/13

y=-223/13

z=-177/52

I really hoped this is correct and it helped, and would appreciate it if you give me brainlliest! If you have any more questions about my solution please ask me in the comments!

Need serious help with this!!!!!!!!!!!!!!!!!!!

Answers

192 miles is how far it travels

Answer:

240 miles

Step-by-step explanation:

64x3 =192

3/4 of 64 is 48

192 + 48 = 240

You deposit $100 in a savings account. The account earns 11% simple interest per year.
a. What is the interest earned after 10 years?
The interest earned is $
after 10 years.
b. What is the balance after 10 years?
The balance is $
after 10 years.

Answers

Answer:

a. ----> $10b. ----> $110

Step-by-step explanation:

principle ( p ) = $100time ( t ) = 10 years rate ( r ) = 11%simple interest = (p × r × t)÷ 100 = ( $100 × 11 × 10 )÷ 100 = 11000 ÷ 100 = $110

interest = simple interest - principle interest = $110 - $100 = $10

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PLZ FOLLOW ME

Distance between (-1,-2) and (8,0)

Answers

Answer:

9.219544

Step-by-step explanation:

(8 - -1)^2 + (0 - -2)^2 = 85, sqrt 85 = 9.219544

Answer:

Step-by-step explanation:

Distance formula : d=√((x_2-x_1)²+(y_2-y_1)²)

d=√((8-(-1))²+(0-(-2))²)

d=√((9)²+(2)²)

d=√(81+4)

d=√(85)

d = 9.21954445729

PLEASE HELP I CANT CONTINUE WITH MY WORK UNLESS THESE ARE COMPLETE AND CORRECT
IP Check: Solving Systems by Elimination
Teachers instructions:
Do not forget the PARENTHESIS in your answers.

Answers

Answer:

1) x=3, y=-3

Step-by-step explanation:

10x + 7y = 9 —— (1)

-4x -7y = 9 —— (2)

(1) + (2)

6x = 18

x = 18/6

x = 3

put x=3 in (1)

10(3) + 7y = 9

30 + 7y = 9

7y = 9 - 30

7y = -21

y = -21/7

y = -3

please give me brainlist if it is helpful for you

Practice: Describe the similarities and differences between the following
equations.
y = -6x and y = -6x + 3

Answers

The first equation would start at the origin (0,0) where as the 2nd one would start 3 points above it. (0,3)
The 2nd equation will always be 3 points above its 1st equation counterpart

Verify that the given segments are parallel.

Answers

Answer:

Step-by-step explanation:

M and N and QR

HEEEEELP The height of a street light is 50 feet. It casts a 40−foot shadow. At the same time, a man standing next to the street light casts a 5−foot shadow. How tall is the man?

Answers

Answer:

5 foot

Step-by-step explanation:

An air conditioning repair company has a flat
service fee and charges an hourly rate. One
customer pays $180 for two hours of work.
Another pays $230 for three hours of work.
Write a linear function for this situation. Use h
For the number of hours.
C(h) =

Answers

Answer:

Step-by-step explanation:

Find the distance between the points.
(-1,-7) and (3, - 7)

Answers

The distance between (-1,-7) and (3,-7) is 4.
The distance is 4 because I used the distance formula

find the missing measure

Answers

Answer:

Step-by-step explanation:

What is the value of y when the value of x is 1

Answers

60 because every x number equals 60 y numbers also if you divide the last x number which is 4 by the last y number that is 240 you get 60

que es la radicasion ​

Answers

Answer:

un lugar, típicamente uno que ha estado previamente deshabitado, donde la gente establece una comunidad.

3 x 5 x 2 uygnkuhgkhgiyhbkhbkgy

Answers

The answer is 30.
Hope this helps

Answer:

30 is the answer hope this helps!!

a $528 video game console is on sale for 15% off. if sales tax is 6.25% what is total coast

Answers

448.80 is the price but let’s not add the sales tax 476.85

The term "off" indicates that the price of the item is reduced by the percentage off. Sales tax is however, added to the price of the item.

The total cost of the video game console is: [tex]\$476.85[/tex]

Given that:

[tex]Game = \$528[/tex]

15% off means that, the price is reduced by 15%.

So, we have:

[tex]Sales =Game - Game \times 15\%[/tex]

[tex]Sales = \$528 - \$528 \times 15\%[/tex]

[tex]Sales = \$528 -\$79.2[/tex]

[tex]Sales = \$448.8[/tex]

The total cost (when the sales tax of 6.25% is added) is:

[tex]Total = Sales + Sales \times 6.25\%[/tex]

[tex]Total = \$448.8 + \$448.8 \times 6.25\%[/tex]

[tex]Total = \$448.8 + \$28.05[/tex]

[tex]Total = \$476.85[/tex]

Hence, the total cost of the video game console is: [tex]\$476.85[/tex]

Read more about sales tax at:

https://brainly.com/question/19715580

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