Mathematics High School

Question Details
Solve
-4x – 6y = 0
-6x- 12y = 18

Answers

Answer 1

Answer:

x = 9

Step-by-step explanation:

-6x -12y = 18

multiply -4x -6y = 0 by -2 to get 8x + 12y = 0

the 12y's cancel out and you combine the equations to get 2x = 18

2x/2 = 18/2

x = 9

Related Questions

10 oranges and 20 grapefruits weigh 35 pounds total. 16 oranges and 10
grapefruits weigh 23 pounds total. How much would 13 oranges and 15
grapefruits weigh?
A 28 pounds
B 29 pounds
C 30 pounds
D 58 pounds

Answers

Answer:

B

Step-by-step explanation:

oranges weigh 0.5 and grapefruits weigh 1.5

The required: 13 oranges and 15 grapefruits would weigh 29 pounds.

The correct option is A.

What is the system of equations?

One or many equations having the same number of unknowns that can be solved simultaneously are called simultaneous equations. And the simultaneous equation is the system of equations.

Let's use a system of equations to solve this problem:

Let's call the weight of an orange "x" and the weight of a grapefruit "y". Then we can write:

10x + 20y = 35 (equation 1)

16x + 10y = 23 (equation 2)

We want to find the weight of 13 oranges and 15 grapefruits, which we can represent as:

13x + 15y

In this case, we can multiply equation 1 by -8 and equation 2 by 15:

-80x - 160y = -280 (equation 1, multiplied by -8)

240x + 150y = 345 (equation 2, multiplied by 15)

Now we can add the two equations to eliminate y:

160x = 65

Solving for x, we get:

x = 65/160

Now we can substitute this value of x back into one of the original equations to solve for y. Let's use equation 1:

10(65/160) + 20y = 35

Simplifying this equation, we get:

13/32 + 2y/4 = 7/2

Multiplying both sides by 32, we get:

13 + 16y = 112

Solving for y, we get:

y = 99/16

Finally, we can substitute these values of x and y into the expression for 13 oranges and 15 grapefruits:

13x + 15y = 13(65/160) + 15(99/16) = 29.0625

Therefore, 13 oranges and 15 grapefruits would weigh approximately 29.0625 pounds, which is closest to answer B, 29 pounds.

To learn more about the system of equations;

brainly.com/question/13729904

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NEED HELP!! ASAP!! 50 POINTS!!
Write an equation of the line that passes through the given point an satisfies the given condition.
(-3,-5); parallel to y = -4x + 1

Answers

-6 = -1/2(9) + B

-6 = 4.5 + B

-6--4.5 = B

-1.5 = B

B= -1.5

y=-1/2x - 1.5

y=-1/2(9) - 1.5

y= -4.5-1.5  

y=-6

What is the simplified expression for 4 power 4 multiplied by 4 power 3 over 4 power 5? (1 point)

Answers

The solution to the problem is 16.

first, you must set up the equation.

[tex]4^4*\frac{4^3}{4^5}[/tex]

Then, simplify exponents.

256*[tex]\frac{64}{1024}[/tex]

Next, simplify the equation.

16

What is the result when 4x^3 + 4x^2 + 13x + 6 is divided by 2x + 1?

Answers

Answer:

15x^2 - x + 2

Step-by-step explanation:

Hhhhhhhhhhhhhhghghgghghhghgjhjhhjhnjhnjnujnjnjjjmijjninkmkmmkkmmkkmmkkmmimiik

please help I am struggling with these problems​

Answers

It is the first option

(n+8)+(n-12) solve plz help me!!!!

Answers

Answer:

2n-4

Step-by-step explanation:

Answer:

2n -4

Step-by-step explanation:

1. Remove the parenthesis

n + 8 + n - 12

2. Simplify

n + 8 + n - 12 = 2n -4

Sue has 18 sweets
Tony also has 18 sweets

sue gives Tony x sweets

Answers

Answer:

18 sweets?

Step-by-step explanation:

Not much info to help me answer it

Each year a store decreased the price of a certain model of TV by $35. If the
price in 2001 was $1,950, what was the price in 2009?
Group of answer choices

Answers

Answer:

dont you just multiply it should be 2,230

Step-by-step explanation:

It’s just 2,230i think sorry

Emily plans to put her graduation money into an account and leave it there for 4 years while she goes to college. She receives $750 in graduation money that she puts into an account that earned $127.50 in interest. What was the interest rate that the bank provided

Answers

Answer:

887.40

Step-by-step explanation:

amount = principal(1i)^n

i = .0425/2 = .02125 , n = 8 , principal = 750

amount = 750(1.02125)^8 = 887.40

Given the two points determine the equation of the line.


A(2,5); B(4,9)
y=-2x + 1
O y = 2x +1
O y = -2x - 1
O y = 2x-1

Answers

the answer is y= 2x + 1

What is the slope of 1.5x+4.5y=18 ,and how do you know?​

Answers

Answer:

m=-1/3

Step-by-step explanation:

The slope of this line is m=-1/3 because if you use the slope-intercept formula, y=mx+b, m is the slope. If you take this equation and plot two points on a line that has this equation, the slope will be negative if the line forms an obtuse angle on the 0 line. In this case, m=-1/3 as the line goes back 1/3 unit for every unit in this equation. Hope it helps!

Answer:  the slope is -0.33...   The does means that 3 is repeating.

Step-by-step explanation:

First we will convert the equation into slope intercept form, which is the same way of solving for y in the equation.

1.5x + 4.5y = 18     Solve for y by first subtracting 1.5x from both sides

-1.5x               -1.5x

4.5y  = 18 - 1.5x     Now divide both sides by 4.5

y= 4- 0.33x

y= -0.33x + 4    Now the slope is the coefficient of the variable x which is the number that comes after the variable.

In this case, the slope is -0.33...

Angle ABC is 42° and is reflected over the y-axis. How many degrees is angle A'B'C'? 1 point

Answers

Answer:24

Step-by-step explanation:

Bet

Wouldn’t it be 84°?
Since it’s being reflected therefore it’s doubling 42 x 2 = 84
That’s just my two cents though I might be wrong

Solve for B. N=-m^2+3d/b

Answers

Answer:

b = 3d/n+m^2

Step-by-step explanation:

Find the 10th term of the sequence defined by the given rule. Assume that the domain of each function is the set of whole numbers greater than 0.

f(1) = 8, f(n) = f(n − 1) + 15

The 10th term is

Answers

Answer:

[tex]87.[/tex]

Step-by-step explanation:

[tex]f(1) = 8, f(n) = f(n − 1) + 15 \\ The \: 10th \: term \: is \: \\ 8(10 − 1) + 15 = 72 + 15 = 87.[/tex]

9999999999999999999999999999999999999+888888888888888888888888888888888888

Answers

Answer:

a lot

Step-by-step explanation:

Mrs. Lopez found a dining table on sale for 45% off. If the
original price was $1,250, how much did she pay for it?

Answers

Answer:

$687.50

Step-by-step explanation:

Answer:

it would be 562.50 because i used the calculator

Step-by-step explanation:

How many solutions does the equation 7x + 3x − 8 = 2(5x − 4) have?

Answers

Answer:

Infinite Solutions because it is 0 = 0

Step-by-step explanation:

4х – 8y = 2
6x - 12y = 3

Answers

Answer:

1. Slope=  

2.000

1.000

​  

=0.500

x−intercept=  

2

1

​  

=0.50000

y−intercept=  

−4

1

​  

=−0.25000

2. Slope=  

2.000

1.000

​  

=0.500

x−intercept=  

2

1

​  

=0.50000

y−intercept=  

−4

1

​  

=−0.25000

Hope this helps!

Is the GCF right yes or no.

Answers

Answer:

yes

Step-by-step explanation:

Answer:

YES, THE GREASTEST COMMON FACTOR IS 7

Step-by-step explanation:

42 = 2 X 3 X 7

154 = 2 X 7 X 11

Can anyone solve this

Answers

Answer:

the answer is the last one. hope this helped.

Step-by-step explanation:

The last one is the answer

؟
A student answers a test of 10 questions
in which he must answer "True"
"false", of
wich he is only sure of the answers he
gave
five questions, he answers the remaining
five at randone
What is the probability of that accredits at
least six in the exam?
so

Answers

Answer:I’m guessing 3 because there’s 10 he knows 5 are right so that’s half of the test, so he would receive half of the credits and half of 6 is 3.

Step-by-step explanation:

i hate math someone knows this please help me this is so diffcult my teacher doesn't explain anything​

Answers

Answer: What is this for (Like what app)

Step-by-step explanation:

The Answer is 13/48 hope this helps mark as brainliest plz.

Answer:

13/48

Step-by-step explanation:

Hope this helps

what is 3n-22= -20​

Answers

Answer:

n = 2/3

Step-by-step explanation:

3n - 22 = -20

Add 22 to both sides

-20 + 22 = 2

3n = 2

Divide both sides by 3

2 / 3 = 2/3

n = 2/3

Let me know if I've done something wrong :)

Answer:

[tex]n = \frac{2}{3}[/tex]

Step-by-step explanation:

Add 22 to each side, so it now looks like this: 3n = 2Divide each side by 3 to cancel out the 3 next to n. It should now look like this: [tex]n = \frac{2}{3}[/tex]  

I hope this helps!

Which point is located on the x-axis?
(-5, 1)
(0, 5)
(1, 0)
(2, 2)

Answers

(1,0)
EXPLANATION:
the horizontal line is x, the vertical line is y.
so you go up one(1 is positive in this case) and right 0(you don’t move) so it stays in the X axis

Answer:

the correct answer is c

Step-by-step explanation:

edg

Please help ASAP
Mark you as brainlister

Answers

you always want to remember a reflection over the y-axis results in the coordinates being changed to (-x,y)
an example would be (-5,4) then become (5,4)

Can someone one help me with this ?

Answers

C :) because all other fraction are 1> or 1

Answer:

Step-by-step explanation:

It should be c

A and B are vertical angles. If m A = (5.x - 2)° and m
B = (3r + 12), then find the value of x

Answers

Answer:

Step-by-step explanation:

∠A=∠B               (V.O.A, Vertically oppt angles are eql)

5x-2=3x+12

5x-3x=12+2

2x=14

∴x=14÷2

x=7°

Answer:

hope that will help you

One roll of duct tape is 180 feet. One case of duct tape is 24 rolls. How many feet of duct tape are in 6 cases?

Answers

Answer:

There are 25,920 feet of duct tape in 6 cases that hold 24 rolls each.

Step-by-step explanation:

24 × 6 = 144

144 × 180 = 25,920 feet

Can someone help me plz

Answers

Answer: C

Step-by-step explanation:

Find the difference between the two points then change to opp. in order to find the other endpoint.

- y - 7x = 6
y + 7x = 8

Answers

Answer:

7 ,x is 1/7

Step-by-step explanation:

plss put me b plsss

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