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Sphinxa [80]
3 years ago
7

In 2–4, write Yes or No to indicate whether the expressions are equivalent. 2. 10x - 3 + 2x - 5 and 4(3x - 2) 3. 3y + 3 and 9(y

+ 1/3) 4. 6(3x + 1) and 9x + 6 + 9x
Mathematics
1 answer:
Dmitry [639]3 years ago
3 0

Step-by-step explanation:

2. 10x - 3 + 2x - 5 and 4(3x - 2)

10x - 3 + 2x - 5

Upon simplifying;

10x + 2x - 3 - 5

12x - 8

4(3x - 2)

12x - 8

Both expressions are equivalent - Yes!

3. 3y + 3 and 9(y + 1/3)

9(y + 1/3)

upon simplifying;

9y + 9 (1/3)

9y + 3

3y + 3

Both expressions are not equivalent - No!

4. 6(3x + 1) and 9x + 6 + 9x

6(3x + 1)

upon simplifying;

6(3x) + 6 (1)

18x + 6

9x + 6 + 9x

Upon simplifying;

9x + 9x + 6

18x + 6

Both expressions are equivalent - Yes!

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Stella [2.4K]

Answer:

$25 per hour

Step-by-step explanation:

Constant of proportionality is found through y/x

So taking the data point 2,50 it 50/2 or 25

7 0
3 years ago
~ HELP NEEDED!!!! 20 POINTS ~
sladkih [1.3K]

Answer:

Here is a proof

 

Angle DEF  =  angle ABC              

A transversal cutting two parallel lines makes alternate exterior angles equal

 

Sum of  measures of angles 1 and 2  = 50° + 48°  =  98°   = measure of angle DEF  =  measure of angle ABC

 

But since  s bisects   angle ABC, then angle 4  =  98 / 2   = 49°

 

But angles 3 and 4  are vertical angles....therefore.... measure of angle 3  =  49°

Step-by-step explanation:

6 0
4 years ago
Can someone please explain to me how this is done
TiliK225 [7]

Answer:

  • See below.

Step-by-step explanation:

<u>We need to add up 4 angles to get 360.</u>

<u>Here is what you fill out for the missing boxes:</u>

  • 70 + 70 = 130
  • 70 goes into the smallest angle.
  • 115 + 115 = 230.
  • If we do 120 or 130, It would make 370 or 390.
  • 130 + 230 = 360.
  • 50 + 50 = 100.
  • Missing 50 goes into smallest angle.
  • 130 + 130 = 260.
  • 260 + 100 = 360.
8 0
2 years ago
Solve the system of equations.<br> - 5x + 2y = 9<br> Y = 78<br> =
Oksi-84 [34.3K]

Answer:

x = 147/5 and y = 78

Step-by-step explanation:

First solve by substitution and put 78 into y in -5x + 2y = 9 so you get 147/5

then plug 147/5 into x and find y

7 0
3 years ago
Read 2 more answers
Can someone please help me on a. and b.
Kitty [74]
A. 3,874 (Multiply 298 by 13.)

B. 46,488 (Multiply 3,874 by 12.)
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3 years ago
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