1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Tema [17]
3 years ago
8

Solve the system of equations. – 5x + 2y = 9 y = 7x X = Y =

Mathematics
2 answers:
Helen [10]3 years ago
6 0

Answer:

x = 1

y = 7

Step-by-step explanation:

Your system of equations is

-5x + 2y = 9

y = 7x

The easiest way to solve this is by substitution.  This means that you set one of the equations equal to a variable and you plug that variable into the variable of the other equation.  The second equation (y = 7x) is already set up this way so we will plug it into the first equation.

-5x + 2(7x) = 9

-5x + 14x = 9

9x = 9

(9x)/9 = (9)/9

x = 1

You have found x.  Now, plug this number into the second equation (y = 7x) to find the value of y.

y = 7(1)

y = 7

Sphinxa [80]3 years ago
5 0

Answer:

<em> x−y = 9 , x + y = 6</em>

<em>x + y = 4  ,  x − y = 2</em>

<em>x + 2 y = 4  ,  x − y = − 3 </em>

<em>try out these examples?</em>

<em />

<em />

You might be interested in
If 14 gallon of paint covers 13 of a wall in Luna's bedroom, how many gallons of paint does she need to cover 1 wall?
dimaraw [331]

Answer:

182 gallons tell me if im right

Step-by-step explanation:

14 times 13 = 182 gal

5 0
3 years ago
As a block of ice melts it changes from 1 3/4 lb to 1/4 lb and takes 1/4 hr. What is the rate the ice changes?
Nutka1998 [239]

The rate at which the ice changes is -3/8 lb per hr

<h3>What is the rate the ice changes?</h3>

The given parameters are:

Changes =1 3/4 lb to 1/4 lb

Time = 1/4 hr.

The rate the ice changes is calculated as:

Rate = Change/Time

So, we have

Rate = (1/4 lb - 1 3/4 lb)/(1/4 hr)

Evaluate the difference

Rate = (-1 1/2 lb)/(1/4 hr)

Evaluate the quotient

Rate = -3/8 lb per hr

Hence, the rate at which the ice changes is -3/8 lb per hr

Read more about rates at:

brainly.com/question/19493296

#SPJ1

8 0
2 years ago
A group of 12 students goes on a school field trip, 6 are in third grade. which fraction is equivalent to 6 12
Elis [28]

The fraction which is equivalent to 6/12 is 1/2

What does a fraction mean?

In the first place, fraction is a numerical quantity or relationship where one number is expressed in terms of another.

In order to determine the equivalence of 6/12 in fraction , we need reduce 6/12 to the lowest term, since 6 is common to 6 and 12 and that 6 divided by gives 1 and 12/6 gives 2, which means that we are left 1/2

The correct fraction which is equivalent to 6/12 is 1/2

Find out more about fraction on:brainly.com/question/5243429

#SPJ1

Full question:

A group of 12 students goes on a school field trip, 6 are in third grade. which fraction is equivalent to 6/12?

(A) 1/3

(B)1/4

(C) 1/6

(D) 1/2

5 0
2 years ago
The length of a rectangle is 8 feet more than its width. If the width is increased by 4 feet and the length is decreased by 5 fe
alexgriva [62]
Let the width be x.

Length is 8 feet more than width. Length = x + 8

Area = x(x + 8)

width increased by 4, that is,  (x + 4)
Length decreased by 5,    (x + 8 - 5) = (x + 3)

Area  = (x + 4)(x +3)

Area remains the same

x(x + 8) = (x+4)(x +3)

x² + 8x =   x(x +3) + 4(x +3)

 x² + 8x =   x² +3x + 4x +12

x² + 8x =   x² +7x +12        Eliminate x² from both sides

8x = 7x + 12

8x - 7x = 12

x = 12

Dimensions of original rectangle :  x,  x + 8

12, 12 +8 =   12, 20

Original rectangle is   20 feet   by 12 feet 
5 0
3 years ago
Read 2 more answers
Use the distributive property to remove the parentheses. (y-3)10​
vlada-n [284]

Answer:

10y-30

Step-by-step explanation:

10*1y=10y

-3*10=-30

10y-30

3 0
3 years ago
Other questions:
  • If f(x)= x2/x+3, find f(x+h)?
    9·1 answer
  • In 36 years, Ishaan will be 3 times as old as he is right now. How old is he right now?
    13·2 answers
  • If 1/2x +1/2(1/2x + 1/2(1/2x +1/2(1/2x + ... = y, then x=?
    10·1 answer
  • McKenzie has enough paint to paint 108 square feet. She wants to paint her garage door, which has a height of 12 feet. The garag
    8·2 answers
  • Find the value of x.......
    10·1 answer
  • The price of a computer was decreased by 7% to £500. What was the price before the decrease? Give your answer to the nearest pen
    7·1 answer
  • 16 points + BRAINLIEST if your answer is correct!
    14·1 answer
  • Ben creates a pattern using the rule “add 5.” Laura creates a pattern using the rule “add 10.”
    14·1 answer
  • Can somone pls help me on this (:
    12·1 answer
  • Solve for x. -3+8x-5=-8 A. -2 B. -1 C. -3/4 D. 0
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!