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erik [133]
3 years ago
13

What is the solution to the equation 9-3x = 7?

Mathematics
2 answers:
disa [49]3 years ago
8 0

\huge{\boxed{x=\frac{2}{3}}}

Add 3x on both sides. 9=7+3x

Subtract 7 from both sides. 2=3x

Divide both sides by 3. \boxed{\frac{2}{3}}=x

emmasim [6.3K]3 years ago
4 0

Answer:

x = \frac{2}{3}

Step-by-step explanation:

Given

9 - 3x = 7 ( subtract 9 from both sides )

- 3x = - 2 (divide both sides by - 3 )

x = \frac{-2}{-3} = \frac{2}{3}

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The diagonal of a square is 8 cm. What is the length of the side of this square? Give your answer as an exact surd in its simple
olga55 [171]

Answer:

4\sqrt{2} cm

Step-by-step explanation:

The diagonal divides the square into 2 right angles with legs s and the diagonal as the hypotenuse.

Using Pythagoras' identity in the right triangle , then

s² + s² = 8²

2s² = 64 ( divide both sides by 2 )

s² = 32 ( take the square root of both sides )

s = \sqrt{32} = 4\sqrt{2}

4 0
3 years ago
Plz help me plz I need it and I’m timed
vladimir2022 [97]

Answer:

isn't it x=9..?

Step-by-step explanation:

3x+1=2x+10

3x-2x=10-1

x=10-1

x=9

5 0
3 years ago
Which expression is equivalent to square root of -80
Law Incorporation [45]
Sqrt(-80) = 8.94427191i
Hope it helped :d
5 0
3 years ago
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Can someone please help me with math.
Alexandra [31]

Answer:

A

Step-by-step explanation:

11 people were given 15% off in the afternoon

11 is the lowest number in the entire chart

5 0
3 years ago
Read 2 more answers
(1/3+9) x ( 8-3) tell me the steps help
mafiozo [28]
Use PEMDAS to solve
(Parenthesis, Exponents, Multiplication, Division, Addition, Subtraction)

Solve parenthesis first
<span>(1/3+9) x ( 8-3)
</span>28/3 x 5

Use Multiplication 
28/3 x 5 ≈ 4.7
After rounding 4.7 should be your answer
3 0
4 years ago
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