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Darina [25.2K]
2 years ago
13

Why cant i understand this

Mathematics
1 answer:
sweet-ann [11.9K]2 years ago
5 0

Answer:

that is corret

Step-by-step explanation:

it sound goos

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How to solve -4{1-2x}-1=7x
mina [271]

Answer:

<h2>x = 5</h2>

Step-by-step explanation:

-4(1-2x)-1=7x\qquad\text{use the distributive property}\ a(b+c)=ab+ac\\\\(-4)(1)+(-4)(-2x)-1=7x\\\\-4+8x-1=7x\qquad\text{combine like terms}\\\\8x+(-4-1)=7x\\\\8x-5=7x\qquad\text{add 5 to both sides}\\\\8x-5+5=7x+5\\\\8x=7x+5\qquad\text{subtract}\ 7x\ \text{from both sides}\\\\8x-7x=7x-7x+5\\\\x=5

7 0
3 years ago
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What have I done wrong and where please help me
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12x - 18 - 4x -2
12x - 4x = 8x (yours 12x - 4x = 8)
-18 - 2 = -20 (yours -18 -1 = 17)

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8x - 20
6 0
3 years ago
The owner expects you to hand wash each coffee pot before the coffee shop opens. It takes 10 minutes for all of the coffee pots
ankoles [38]
Pretty sure it is 16
7 0
3 years ago
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Whats 7 times 8 divided by 2 i think the answer s 6 am i right or ring please tell me
slamgirl [31]

Answer:

<h2><em><u>28</u></em></h2>

Step-by-step explanation:

<em><u>First</u></em><em><u>,</u></em>

7 times 8 = 7 × 8 = 56

<em><u>Then</u></em><em><u>,</u></em>

The product divided by 2 = 56 ÷ 2 = 28

<em><u>Hence</u></em><em><u>,</u></em>

<em><u>The</u></em><em><u> </u></em><em><u>required</u></em><em><u> </u></em><em><u>answer</u></em><em><u> </u></em><em><u>is</u></em><em><u> </u></em><em><u>28</u></em>

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2 years ago
Maria walked 3 km west and 4 km south calculate how far she is from her starting point.
Rufina [12.5K]

Answer:

5 km

Step-by-step explanation:

We are given the distances walked by Maria;

  • 3 km west and 4 km south

We are required to determine the displacement from her starting point;

  • We are going to use Pythagoras's theorem;

a² + b² = c²

Taking, the distances towards south and towards west as the legs of the triangle;

Then, c² = 3² + 4²

               = 25

         c  = √25

            = 5 km

Therefore, the displacement from the starting point is 5 km

8 0
2 years ago
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