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mina [271]
2 years ago
7

n="absmiddle" class="latex-formula">
Mathematics
1 answer:
Lelechka [254]2 years ago
6 0

An expression is defined as a set of numbers, variables, and mathematical operations. The value of x is either -7 or 3.

<h3>What is an Expression?</h3>

In mathematics, an expression is defined as a set of numbers, variables, and mathematical operations formed according to rules dependent on the context.

The complete question is "Find the value of x in the expression \sqrt{30+2x}=x+3".

The given expression \sqrt{30+2x}=x+3 can be solved for x as,

\sqrt{30+2x}=x+3

Square both the sides of the equation,

(\sqrt{30+2x})^2=(x+3)^2

30 + 2x = x² + 9 + 6x

0 = x² + 6x - 2x + 9 - 30

0 = x² + 4x - 21

0 = x² + 7x - 3x - 21

0 = x(x+7)-3(x+7)

0 = (x+7)(x-3)

x = -7, 3

Hence, the value of x is either -7 or 3.

Learn more about Expression:

brainly.com/question/13947055

#SPJ1

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110 +0.70x = 50+ 0.90x​
timurjin [86]

Answer:

\boxed{ \bold{ \huge{ \boxed{ \sf{x = 300}}}}}

Step-by-step explanation:

\sf{110 + 0.70x = 50 + 0.90x}

Move 0.90x to left hand side and change it's sign

⇒\sf{0.70x - 0.90x + 110 = 50}

Move 110 to right hand side and change it's sign

⇒\sf{0.70x - 0.90x = 50 - 110}

Collect like terms

⇒\sf{ - 0.2x = 50 - 110}

Calculate

⇒\sf{ - 0.2x =  - 60}

Divide both sides of the equation by -0.2

⇒\sf{ \frac{ - 0.2x}{ - 0.2}  =  \frac{ - 60}{ - 0.2} }

Calculate

⇒\sf{x = 300}

Hope I helped!

Best regards!!

5 0
2 years ago
How do the 8s in 6.58 and 47.816 compare?
il63 [147K]

Answer:

C

Step-by-step explanation:

0.08 multiplied by 10 is 0.8.

4 0
3 years ago
Roberto wrote a sentence that describes an equation half of a number is 45 which choice shows Roberto’s equation and it’s soluti
xenn [34]

Answer:The correct answer is D-x/2=45; x=90

Explanation: I just took the test and got a 100%

3 0
3 years ago
Find the sum for each and present - 66 + 42​
Fed [463]

-24

-66+42

=-24 since it is negative

3 0
3 years ago
Read 2 more answers
What is the slope of (-13,8) and (3,12)
love history [14]

Answer:

Slope = 1/4

Step-by-step explanation:

Y2 - Y1 / X2 - X1

8 0
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