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
natali 33 [55]
3 years ago
11

How can you solve problems involving equivalent expressions?

Mathematics
2 answers:
jarptica [38.1K]3 years ago
8 0
<span>Setting expressions equal to one another gives us an equation.

In an equation, our goal is to isolate the variable; we must "undo" everything that has been done to the variable. We work backward; the last thing done to the variable will be the first thing we undo.

We "undo" things by performing the opposite operation; for instance, if the last thing done to our variable was that 3 was subtracted from it, we would undo that first by adding 3 to both sides.

What we do to one side we must do to the other in order to preserve equality.

We would continue this process of working backward until the variable was isolated; this would give us our solution.</span>
Akimi4 [234]3 years ago
6 0

Solution

Consider Case 1

Find cost of 4 pens and 5 pencils if cost of one pen is $ x and Cost of one pencil is $ y.

So, Total cost of 4 pens and 5 pencils is given by: Z= 4 x + 5 y

Case 2:

The cost of one kg of wheat is $ R and one kg of Rice Cost $ S.Find the total cost of 4 Kg of wheat and 5 Kg of rice.

So, Cost of 4 Kg of wheat and 5 Kg of rice,M= 4 R + 5 S

4 x + 5 y= 4 R + 5 S

As, in both the cases  , total cost ,Z as well as M are equivalent expressions.

So, as there are two variables in each case, as coefficient of variables being the same.

So, just substitute different integral or real values of variables ,and we will get the result according to given problem.

You might be interested in
What is the answer to this question ? Pls help!!
sammy [17]
The answer is B when you subtract every like term
6 0
2 years ago
Read 2 more answers
I'm very confused on how to even figure out the question and what I'm supposed to do
Tasya [4]

Answer:

To solve a system of linear equations graphically we graph both equations in the same coordinate system. The solution to the system will be in the point where the two lines intersect. The two lines intersect in (-3, -4) which is the solution to this system of equations. I hope this helped!

5 0
2 years ago
What is 8 + ¼ ÷ ⅖ using order of operations
Ksivusya [100]

Answer:

exact form: 69/8

mixed number form: 8 5/8

Step-by-step explanation:

                          ^

1/4 ÷ 2/5 = 5/8   |

5/8+8 = ______|

6 0
2 years ago
Find the slope of the line that passes through the points (1,-5) and (5. 7).
SCORPION-xisa [38]

Answer:

y= 5.7x-10.7

Step-by-step explanation:

the formula is y=mx+b

4 0
3 years ago
Read 2 more answers
Help me please!!!!!!!!!!​
weeeeeb [17]

Answer:

  • slope: -5/3
  • y-intercept: 2
  • x-intercept: 6/5 = 1.2

Step-by-step explanation:

Finding the slope is perhaps easiest done by solving for y.

  5x -6 = -3y . . . . subtract 3

  y = -5/3x +2 . . . divide by -3

This is slope-intercept form, so we can see both the slope (the coefficient of x, -5/3) and the y-intercept (the constant, +2).

__

To find the x-intercept, we set y=0 and solve for x. This might be most easily done using the original equation:

  5x -3 = 0 +3 . . . . set y = 0

  5x = 6 . . . . . . . . . add 3 to get the x-term by itself

  x = 6/5 = 1.2 . . . . divide by the coefficient of x. This is the x-intercept.

__

Slope = -5/3

y-intercept = 2

x-intercept = 6/5

3 0
3 years ago
Other questions:
  • a pair of sneakers is on sale for $51 this is 75% of the original price, what is the original price of the shoes?
    10·1 answer
  • The system containing the lines ___ and ____ has no solution
    6·1 answer
  • Last week donnell practiced the piano 3 hours longer than marcus . Together donnell and marcus practiced the piano for 11 hours
    15·2 answers
  • formula for glue says to add 45ml of hardener to each container of resin. how much hardener should be added to 18 containers of
    14·1 answer
  • How to solve? I basically want to know the first step..
    11·2 answers
  • #1 #2 #3 &amp; #4 thank you
    15·2 answers
  • Select the correct graph.
    15·1 answer
  • Find the length of y in feet. (Similar angles or sides, I think)
    8·1 answer
  • Please help . I need it fast . Will give branliest .
    11·1 answer
  • Quadrilateral OPQR is inscribed inside a circle as shown below. What is the measure of angle Q? You must show all work and calcu
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!