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Kryger [21]
3 years ago
10

pasha is thinking of a number such that when twice the number is added to three times one more than the number she gets the same

result as when she multiplies four times one less than the number. what number is pasha thinking about?
Mathematics
2 answers:
Lelechka [254]3 years ago
5 0
<span>This is the equation made from the problem where x=mystery number
</span><span>2x+3(x+1)=4(x-1)</span><span>

</span><span>Now let's solve for x!
</span><span>
</span><span>We start by distributing 3 into (X+1)
</span><span>
</span><span>3(x)=3x  and 3(1)=3
</span><span>
</span><span>Now our equation is 2x+3x+3=4(x-1)
</span><span>
</span><span>Let's combine both x values on the left side of the equation: 2x + 3x=5x
</span><span>
</span><span>We now have 5x+3=4(x-1)
</span><span>
</span><span>Let's distribute 4 into (x-1)
</span><span>
</span><span>4(x)=4x  and 4(-1)=-4
</span><span>
</span><span>Now our equation is 5x+3=4x-4
</span><span>
</span><span>subtract 3 form both sides
</span><span>
</span><span>5x=4x-7
</span><span>
</span><span>subtract 4x from both sides
</span><span>
</span><span>x=-7
</span><span>
</span><span>Yay! So the number she is thinking of is -7!</span><span>








</span>
Agata [3.3K]3 years ago
5 0

Answer:

The number is -7.

Step-by-step explanation:

Let the number be = x

when twice the number is added to three times one more than the number. Mathematically, we can denote this as:

2x+3(x+1)  

She gets the same result as when she multiplies four times one less than the number.

4(x-1)

Now, both the results are same, so we will equate them same.

2x+3(x+1)=4(x-1)

=> 2x+3x+3=4x-4

=> 5x+3=4x-4

=> 5x-4x=-4-3

This gives x = -7

So, the number Pasha was thinking was -7.

We can check this:

2(-7)+3(-7+1)=4(-7-1)

=> -14+3(-6)=4(-8)

=> -14-18=-32

=> -32=-32   (checked)

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Answer:

Yes. The data provide enough evidence to support the claim that the mean weight of one-year-old boys is greater than 25 pounds.

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Then, the null and alternative hypothesis are:

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The degrees of freedom are:

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As the P-value is smaller than the significance level, the effect is significant and the null hypothesis is rejected.

There is enough evidence to support the claim that the mean weight of one-year-old boys is greater than 25 pounds.

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