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coldgirl [10]
3 years ago
13

Helppppp fast pleaseeeeeee

Mathematics
1 answer:
mario62 [17]3 years ago
7 0

Answer:

72

Step-by-step explanation:

68 69 71 71 71 73 74 75 75 78 and then cross off each number until you reach the middle. You will see 71 and 73 next to each other, what's in-between those two numbers? 72!

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The product of 3 and a number is the same as 10 less than twice the number
kicyunya [14]

Hello!

First, create a variable representing the number. In this case, let's just say n = the number.

Now, solve this by side. You can tell which is on which side of the equation by the words "is the same as". Anything before that is on one side, and anything after is on the other.

Left side: "The product of 3 and a number"

Here, we get our first side. The product means when two numbers are multiplied together. Thus, the product of 3 and a number would be 3 and a number multiplied together, or 3n.

Right side: "10 less than twice the number"

Finally, our last side. What we want to do first is "twice the number". This is because this happens first, even though the words are ordered differently. Twice the number means the number doubled, or *2. Therefore, multiply 2 and n together, to get 2n.

Next, add the "10 less" part. To do this, subtract 10 from 2n. We then get 2n - 10.

Finally, put the equation together. Take 3n and 2n-10, and create an equation. We get 3n = 2n-10.

Therefore, we have our final answer, or 3n = 2n - 10.

Hope this helps!

8 0
3 years ago
Greg has to carry 191 apples from a farm to the market. how many baskets will need, given that each basket can hold 42 apples?
soldi70 [24.7K]
191 / 42 = 4.5.....so Greg is gonna need 5 baskets....but the last basket is only gonna be half full.
8 0
3 years ago
In a study of 250 adults, the mean heart rate was 70 beats per minute. Assume the population of heart rates is known to be appro
klasskru [66]
This is a good question!

The steps are like follows:

Form the confidence level (99%), we calculate the "alpha" value
alpha=1-(99/100)=0.01

Now, calculate the critical probability (p-start)
p*=1-(alpha/2)=1-(0.01/2)=0.995

z-score could be calculated from p*,,,
z-score=<span>2.57583
(http://www.socscistatistics.com/tests/ztest/zscorecalculator.aspx)

Now, calculate the Margin of Error:
</span>standard<span> deviation = s
number of adults = n
</span><span>
ME=(z*s)/(sqrt n)=(</span><span>2.57583*12)/(sqrt 250) = 1.955

The confidence interval = mean +or- ME
                                      = 70+1.955</span>  or  70-1.955


So that we can conclude that <span>the 99% confidence interval for the mean beats per minute is 68.045 and 71.955

</span>

I hope you got the idea!

If you still need help, just let me know!





4 0
3 years ago
Working conditions in the United States in the early 1900's can best be described as?
Dmitry_Shevchenko [17]
Working conditions in the United States in the early 1900’s can best be described as atrocious.
6 0
3 years ago
Read 2 more answers
Which list orders -3,2,5, -1 From least to greatest
seropon [69]
The answer is: -3,-1,2,5
7 0
2 years ago
Read 2 more answers
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