{−2x+7y=−7
−5x+14y=−7

Answers

Answer 1

Answer: x=7, y=2

Step-by-step explanation:

1. -2(-2x+7y=-7) -> 4x-14y=14

2. 4x-14y=14

   -5x+14y=-7

3. -x = 7, x=7

4. -5(7)+14y=-7

5. -35+14y=-7

6. 14y=28, y=2

Answer 2

Answer: [tex]x=-7[/tex], [tex]y=-3[/tex]

Step-by-step explanation:

[tex]\left \{ {-2x+7y=-7} \atop {-5x+14y=-7} \right.[/tex]

multiply 2 at [tex]-2x+7y=-7[/tex]

[tex]-4x+14y=-14[/tex]

subtract [tex]-4x+14y=-14[/tex] and [tex]-5x+14y=-7[/tex]

[tex]x=-7[/tex]

put [tex]x=-7[/tex] at [tex]-2x+7y=-7[/tex]

[tex]7y=-21, y=-3[/tex]


Related Questions

Mr. Abdullah’s new car can travel 420 miles on a 12-gallon tank of gas. Determine how many miles he can travel on 8 gallons

Answers

Answer:

280

Step-by-step explanation:

What is the volume for 14 8 10 10 10 8?

Answers

Answer:

I believe volume is three dimensions. And thus three terms, so I don't believe you have the right setup. Or you need to clarify something somewhere.

Step-by-step explanation:

Who knows the answer to this

Answers

x=-15/2 , 4

I'm sorry if I'm wrong

You finance a $500 car repair completely on credit, you will just pay the minimum payment each month for the next three months. The APR is 18.99% and the minimum payment each month is 4% of the balance. Determine the finance charge, carry-over balance, and minimum payment required for each of the next two months, and the starting balance for month 2 in the table below.

Answers

Answer:

Determination of the Finance Charge, Carry-over balance, Minimum Payment for each of the next two months:

Finance Charge:

First month = $7.91

Second month = $7.72

Carry-over balance:

First month = $487.59

Second month = $475.50

Minimum Payment:

First month = $20.32

Second month = $19.81

Starting balance (Carry-over balance + Finance charge):

First month = $507.91

Second month = $495.31

Step-by-step explanation:

a) Data and Calculations:

Credit Finance = $500

APR = 18.99%

Minimum monthly payment = 4% of the balance

Monthly rate of interest = 0.1899/12 = 0.015825

Finance Charge:

First month = $7.91 ($500 * 0.015825)

Second month = $7.72 ($487.59 * 0.015825)

Carry-over balance:

First month = $487.59($507.91 - $20.32)

Second month = $475.50 ($495.31 - $19.81)

Minimum Payment:

First month = $20.32 ($507.91 * 4%)

Second month = $19.81 ($495.31 * 4%)

Starting balance (Carry-over balance + Finance charge):

First month = $507.91 ($500 + $7.91)

Second month = $495.31 ($487.59 + $7.72)

Choose the correct answer to complete the sentence about how the wave is affected by the brick wall.

Rougher sections of the wall surface will cause the___ from the emergency vehicle to scatter.

sound waves
light waves
sound and light waves

Answers

Answer:

I think sound waves

Step-by-step explanation:

I'm not smart listen to someone else

I need help with math ​

Answers

How can I help you?

one student can paint a wall in 10 minutes another student can paint the same wall in 15 minutes working together how long will it take for them to paint the wall?

Answers

Answer:

6 min

Step-by-step explanation:

given that the rate for the first student is 10 min per wall

we can express this in wall per minute by taking the reciprocal

hence student 1's unit rate = 1/10 wall per min

similarly, we can express student 2's unit rate as 1/15 wall per min.

if we add up the two, we will get the amount of wall painted by two people working together per min

amount of wall painted per min by 2 people

= wall per min of person 1 + wall per min of person 2

= 1/10 + 1/15

= 3/30 + 2/30

= 5/30

= 1/6 wall per min.

to convert this to minutes per wall, we take the reciprocal:

number of minutes that both people will take to paint the wall

= 1 / (1/6)

= 6 min per wall  (answer)

What is the equation of the line in slope intercept form? Enter your answer in the boxes.

Answers

Answer:

the answer is y= 5/2 x +5

Answer:

y = [tex]\frac{5}{2}[/tex] x + 5

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Calculate m using the slope formula

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

with (x₁, y₁ ) = (- 2, 0) and (x₂, y₂ ) = (0, 5)

m = [tex]\frac{5-0}{0+2}[/tex] = [tex]\frac{5}{2}[/tex]

The line crosses the y- axis at (0, 5 ) ⇒ c = 5

y = [tex]\frac{5}{2}[/tex] x + 5 ← equation of line

Is the percentage illumination of the moon's surface a linear function of the day

Answers

Answer:

No (The linear model did a very bad job of approximating the data.)

I am so sorry if this in incorrect.

The percentage illumination of the moon's surface is not a linear function of day

How to determine the true statement?

From the complete question, the dataset can be represented using the following table:

Days   Percentage Illumination

1           2%

2          6%

3          50%

4          100%

Notice that as the number of days increase by 1, the percentage illumination of the moon increase at different intervals

This means that the percentage illumination is not a linear function of day

Read more about linear functions at:

https://brainly.com/question/14323743

#SPJ2

3.4 divided by 57.8, I cannot seem to understand plz explain

Answers

Answer:

17 /1

​decimal form =0.05882

Step-by-step explanation:

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "57.8" was replaced by "(578/10)". 2 more similar replacement(s)

STEP1:

           289

Simplify   ———

            5

The equation at the end of step1:

 34   289

 —— ÷ ———

 10    5

STEP2:

           17

Simplify   ——

           5

The equation at the end of step2:

 17   289

 —— ÷ ———

 5     5

STEP3:

        17      289

Divide  ——  by  ———

        5        5

3.1   Dividing fractions

To divide fractions, write the division as multiplication by the reciprocal of the divisor :

17     289       17      5

——  ÷  ———   =   ——  •  ———

5       5        5      289

Final result :

  1          

 —— = 0.05882

 17          

12 divided by 1/4 please help got a test next Monday

Answers

Answer:

48

Step-by-step explanation:

Answer:

1/3

Step-by-step explanation:

When dividing fractions flip and multiply.

So 12 would become 1/12

and 1/4 would become 4/1

Now multiply

[tex]\frac{1}{12}*\frac{4}{1}= \frac{4}{12} = \frac{1}{3}[/tex]

So the answer is 1/3

When dividing fraction remember to flip then multiply much easier that way!

Hope this helps!!

an amount A is initially 8. To find next week's amount, we multiply this week's amount by 4. Find a formula that gives the amount A after T weeks

Answers

Given:

Initial amount = 8

To find next week's amount, we multiply this week's amount by 4.

To find:

A formula that gives the amount A after T weeks.

Solution:

We have,

Initial amount = 8

According to the question,

Amount of next week = 4 × Amount of this week

Amount after one week is

[tex]A=4\times 8[/tex]

Amount after two week is

[tex]A=4\times (4\times 8)[/tex]

[tex]A=4^2\times 8[/tex]

Amount after T week is

[tex]A=4^T\times 8[/tex]

[tex]A=8(4)^T[/tex]

Therefore, the required formula that gives the amount A after T weeks is [tex]A=8(4)^T[/tex].

3/4 (x-12) = 12
solve for x

Answers

Answer:

28

Step-by-step explanation:

I got this question on  a test and got it right

HAVE A GREAT DAY!

A recipe calls for 2 3/4 cups of flour to make 24 muffins. Barry has 8 1/4 cups of flour. How many muffins can he make?

Answers

Answer:

72 muffins

Step-by-step explanation:

8 1/4 divided by 2 3/4

33/4 x 4/11

3 x 24 = 72

Answer:

72 muffins so 3 batches

Step-by-step explanation:

i just counted the 1/4 cups is the amount that was needed for 1 batch (which btw is 11)

and barry had (8times4 1/4cups) 33

so 3 batches tomes 24 muffins is 72 muffins in total

hope this helped ❤

i will give the BRAINIEST

given g (x)= f (x)+k. Identify a value of k that transforms f into g. Round your answer to the nearest integer.​

Answers

K= 5

Step-by-step explanation:

You must count the distance between so if you look at where it lines up perfect -3,0 up to 2 the distance is 5

Answer:

k = - 5

Step-by-step explanation:

The slopes are same and y-intercepts are:

2 for f and -3 for g

Since we have:

g(x) = f(x) + k

We can find the value of k:

-3 = 2 + kk = -3 - 2k = -5

Answer is k = - 5

Please help it’s due

Answers

Answer:

i dnt know

Step-by-step explanation:

Answer:

m<1 = 75

m<2 = 55

m<3 = 55

Step-by-step explanation:

Well <1 + 50° is vertical to 125 so do this

<1 + 50 = 125 (subtract 50 on both sides)

<1 = 75

Now <1 + <2 + 50° = 180

We know what <1 is so..

75 + <2 + 50 = 180 (collect like terms)

125 + <2 = 180 (subtract 125 on both sides)

<2 = 55

Since <2 and <3 are vertical that means they equal the same so

<3 = 55

Hope this helps ya! Keep smiling!

{ months of the year with 4 letters}​

Answers

Answer:

June, July

Step-by-step explanation:

Please give me brainliest

Use benchmark values to estimate 7/10 + 7/8.​

Answers

Answer:

1.575

Step-by-step explanation:

Please answer this correctly without making mistakes

Answers

Answer:

The price per inch is $0.26.

Step-by-step explanation:

There are 12 inches in 1 foot.

First, we need to calculate what the cost is per foot.

18.72 / 6 = 3.12

From this answer, we have to divide by 12 to calculate what the price is per inch.

3.12 / 12 = 0.26

I hope this was helpful to you! If it was, please consider rating, pressing thanks, and marking my answer Brainliest. It would help a lot. Have a wonderful day!

How long does it take for an investment to double its value if the interest is 7.25%
compounded continuously?

Answers

Answer: 9.9 years

Step-by-step explanation:

We have an interest of 7.25%, compounded continuously, we can write this as:

P = A*e^(r*n)

where:

P is the total balance after n years.

A is the initial investment.

r is the ratio of increase, in the case of a continuous compound, this will be:

r = Ln(1 + 7.25%/100%) = Ln(1 + 0.0725) = 0.070

n is the time in years.

Then we want to have our initial investement doubled, this means:

P = 2*A

let's find n for this situation:

P = 2*A = A*e^(0.070*n)

     2 = e^(0.070*n)

Now we can apply the Ln() to both sides, remember that:

Ln(e^x) = x

Then:

 2 = e^(0.070*n)

Ln(2) = Ln(e^(0.070*n)) = 0.070*n

Ln(2)/0.070 = 9.9

So we need 9.9 years to double the initial investment.

what is the constant rate of change Y= 4 + 3x what is the y- intercept

Answers

b intercept = 4 constant rate of change (m) = 3 (please mark brainliest)

Which algebraic expression is equivalent to the expression below? 4/5x - 7/5y


A. 1/5(4x - 7y)

B. 5(7x - 7y)

C. 5(4x - 7y)

D. 1/5(7x + 4y)

Answers

I think the answer is A sorry if I get it wrong :(

PLEASE HURRY, ILL GIVE BRAINLIEST

A football player kicks a ball with a force of 50 N. Find the impulse on the ball if his foot stays in contact with the football for 0.01 second.

Answers

Answer:

I= f.t = (50) (0.01) = (0.5) kg.m15

Step-by-step explanation:

jesus loves you and cares for you

Bert is saving money to buy a new phone that costs $153.66, including tax. He does yard work around his neighborhood to earn money. He charges $9.85 per hour.

Part B:

How many hours will Bert have to work to earn enough money to buy the phone?

Answers

Answer:

4.57

Step-by-step explanation:

what's 1+9 pls helpppppppp

Answers

Your answer would be 10

Help i need the answer now please!

Answers

Answer:

no

Step-by-step explanation:

No , Have Ah Nice Day

What is the answer for number 2

Answers

The answer is 63. The answer is in the picture

Answer:

Your answer would be x = 63

Step-by-step explanation:

What I would do first is to isolate the -1/9x, which means I would subtract 17 on each side, giving me -1/9x = -7

Next I would multiply -9 (which is the inverse of -1/9) on both sides, negating the negative sign and making 63 positive, and thus isolating x as well.

Translate the phrase into an algebraic expression.
The product of 8 and b

Answers

Answer:

8xb=a (answer)

Step-by-step explanation:

I hope this helps :)

A veterinarian treated 7 dogs this morning. The list below gives the weights (in pounds) of each dog. , 6, 46, 21, 9, 21, 5143 Find the range of the data set.

Answers

Answer:

5137

Step-by-step explanation:

x+1 is a factor of x[tex]x+1 is a factor of x^2-1[/tex]
True or False

Answers

Answer:

False ( i think)

Step-by-step explanation:

Answer:

FALSE.... ...

Thank you ☺️

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