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BartSMP [9]
3 years ago
7

For my brother 2x-3+6x=21 X= what

Mathematics
2 answers:
eimsori [14]3 years ago
8 0

Answer:

Step-by-step explanation:

Simplifying

2x-3+6x=21  combine like terms

8x-3=21

Step 2

8x-3=21  Add 3 to the sides

8x=24

Step 3

8x=24  Divide the sides by 8

Your answer would be x=3

AnnZ [28]3 years ago
4 0

Answer:

3

Step-by-step explanation:

mhm for your brother

anyways...

2x-3+6x = 21

Adding like terms

8x -3 = 21

Adding 3 on both sides

8x = 24

Dividing both sides by 8

x = 3

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Does this answer your question − 16 n  +  16

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3 years ago
6. The table shows the equations Ms. Valez discussed in math class today.
k0ka [10]

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One zero is always added when the power is added by +1

Step-by-step explanation:

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3 years ago
Read 2 more answers
Answer it answer it answer it
Usimov [2.4K]

Answer:

The correct option is;

C. 52.2 × 4.4 × 2 + 47.8 × 4.4 × 2

Step-by-step explanation:

The area of the square frame is the area of the inner square subtracted from the area of the outer square

Which gives;

52.2² - 47.8² = 440

Therefore;

Option A. 52.2² - 47.8² is a correct way of finding the area of the square frame

Option B. 2 × ((52.2×2.2) + (47.8×2.2)) = 440, is  a correct way of finding the area of the square frame

Option C. 52.2 × 4.4 × 2 + 47.8 × 4.4 × 2 = 880, is not a correct way of finding the area of the square frame

The error is the thickness is 2.2 not 4.4

Option D. 100×(52.2 - 47.8) = (52.2 + 47.8) × (52.2 - 47.8) = 52.2² - 47.8² = 440,  is  a correct way of finding the area of the square frame

5 0
3 years ago
(1 point) Deshaun is a plumber who charges $40 per hour for his work. Another plumber, Silvio, charges based on the equation d =
SashulF [63]

Answer:

A

Step-by-step explanation:

Deshaun charges $40 per hour.

So if Deshaun and Silvio work for 5 hours, then it would be $40(5) which would be more expensive than Silvio's with $60 + 20(5). Silvio gets $60 with $20 per hour.

Deshaun would get $200 while Silvio would get $160.

8 0
3 years ago
Find the value for b. 3x^2– X-10 =0<br>​
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Answer:

3x^2 -(6-5)x-10=0

3x^2 -6x+5x-10=0

3x(x-2)+5(x-2)=0

(x-2) (3x+5) = 0

either,

x -2 =0

x=2

then,

3x +5=0

x= -5/3

3 0
2 years ago
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