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aleksandr82 [10.1K]
3 years ago
5

3x + 5 = 12 - 7x Please someone answer

Mathematics
1 answer:
jonny [76]3 years ago
7 0

Answer:

x=7/10

Step-by-step explanation:

Let's solve your equation step-by-step.

3x+5=12−7x

Step 1: Simplify both sides of the equation.

3x+5=12−7x

3x+5=12+−7x

3x+5=−7x+12

Step 2: Add 7x to both sides.

3x+5+7x=−7x+12+7x

10x+5=12

Step 3: Subtract 5 from both sides.

10x+5−5=12−5

10x=7

Step 4: Divide both sides by 10.

10x10=7/10

x=7/10

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denis-greek [22]
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Exactly the same process as above.
Here's another method:
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3 years ago
<img src="https://tex.z-dn.net/?f=%20%5Csqrt%5B3%5D%7B875%7D%20" id="TexFormula1" title=" \sqrt[3]{875} " alt=" \sqrt[3]{875} "
icang [17]

We are given the following expression:

\sqrt[3]{875}

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Applying the property:

\sqrt[3]{125}\times\sqrt[3]{7}

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Solve the equation: |2x + 5| = 11.
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Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
The class scores of a history test have a normal distribution with a mean Mu = 79 and a standard deviation Sigma = 7. If Opal’s
e-lub [12.9K]

Using the normal distribution, we got that expression for the z-score of her test score is

z= \frac{72-29}{7} \\\\z=-7/7\\\\z=-1

<h3>What is Normal Probability Distribution?</h3>

it's a type of probability distribution which is  symmetric about the mean, it gives data near the mean are more frequent than data far from the mean.

Given that mean =\mu=79

and standard deviation =\sigma = 7

X=73

we know that formula of z-score is

z=\frac{X-\mu}{\sigma}

Hence Z-score can be calculated as

z= \frac{72-29}{7} \\\\z=-7/7\\\\z=-1

Using the normal distribution, we got that expression for the z-score of her test score is

z= \frac{72-29}{7} \\\\z=-7/7\\\\z=-1

To learn more about the normal distribution visit : brainly.com/question/24663213

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