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pshichka [43]
3 years ago
9

Help me with this, pls

Mathematics
1 answer:
Rufina [12.5K]3 years ago
6 0
Don't forget to follow me!!!

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Sophia determined that the expression Negative (4 x minus 5) + 2 (x minus 3) is equivalent to –2x – 5 by using the steps below.
CaHeK987 [17]

Answer:Hope This Helps ☺️

Step-by-step explanation:

She is not correct because she did not substitute the same number in both expressions in Step 1

Step-by-step explanation:

CASE 1: substitute 1 for x to both sides of the equations

L.H.S

-(4x-5)+2(x-3)

-(4 (1) - 5)+ 2(1-3) = - (-1) + 2(-2) = 1 - 4 = -3

R.H.S

-2x - 5

-2(1) - 5 = -2-5 = -7

Hence for x= 1

-(4x-5)+2(x-3) ≠ -2x -5

Because -3 ≠ -7

CASE 2: substitute -1 for x to both sides of the equations

L.H.S

-(4x-5)+2(x-3)

-(4 (-1) - 5)+ 2(-1-3) = - (-9) + 2(-4) = 9 - 8 = 1

R.H.S

-2x - 5

-2(-1) - 5 = 2-5 = -3

Hence for x= -1

-(4x-5)+2(x-3) ≠ -2x -5

Because 1 ≠ -3

Answer:

She is not correct because she did not substitute the same number in both expressions in Step 1

3 0
3 years ago
Read 2 more answers
Write 4 x 3,569 in expanded form to show the place value of each digit. Then find the product.
RideAnS [48]
The answer would be 14,276
4 0
3 years ago
If f(x) is the total cost, in dollars, of x candles, which of the following statements best describes the meaning of f(2)=6
nevsk [136]

Answer: A) The total cost of 2 candies is $6.00.

Step-by-step explanation:

Hi, the question is incomplete,  options are :

A) The total cost of 2 candies is $6.00. B) The total cost of 6 candies is $2.00. C) The total cost of 2 candies is $3.00. D) The total cost of 3 candies is $2.00.  

So, to answer this question we have to analyze the function given:

f(2)=6

Since the input value x (number of candles) is 2, and the output (cost in dollars ) is $6, the correct option is :

A) The total cost of 2 candies is $6.00.  

6 0
3 years ago
A car dealership sold 850 cars last year. This year the dealership sold 715 cars. What is the percent decrease, to the nearest p
Bumek [7]
The answer is 16%

Hope this helps :)
3 0
2 years ago
Read 2 more answers
21. Carmen spent $1.28 for 8 pieces of
Dmitrij [34]

Answer:

2.40

Step-by-step explanation:

7 0
3 years ago
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