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asambeis [7]
2 years ago
14

Plzzzz help!!!

Mathematics
1 answer:
Marrrta [24]2 years ago
6 0

Answer:

<h2>( -32.3 ,  86.6 )</h2>

Step-by-step explanation:

Solve for the first variable in one of the equations, then substitute the result into the other equation.

( − 32. 230769 ,  86.5  692307 )

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Pete traveled 1,380 miles in two days.The first day , he traveled 1.5 times as far as he did the second day . How many miles did
ahrayia [7]
Let s be the distance traveled the second day.

1.5s+s=1380

2.5s=1380

s=552

So on the first day he traveled 1380-552=828 miles.
6 0
2 years ago
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Kyle is practicing for a 3-mile race. His normal time is 23 minutes 25 seconds. Yesterday it took him only 21 minutes 38 seconds
diamong [38]

Answer:2:24

Step-by-step explanation:

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2 years ago
A furnace used 40% of the fuel in its tank in the month of March and then used 25% of the remaining fuel in the month of April.
gtnhenbr [62]
March: 240 * 0.4 = 96 used
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6 0
2 years ago
A teacher wants to see if a new unit on factoring is helping students learn. She has five randomly selected students take a pre-
sergiy2304 [10]

Answer:

The <em>t</em>-value used for the 95% confidence interval of paired data is 2.776.

Step-by-step explanation:

The confidence interval formula for mean difference for a paired data is as follows:

CI=\bar x_{d}\pm t_{\alpha/2, (n-1)}\times \frac{s_{d}}{\sqrt{n}}

Here,

\bar x_{d} = sample mean of the difference,

s_{d} = sample standard deviation of the difference,

<em>n </em>= sample size (both samples are of same size).

t_{\alpha/2, (n-1)} = critical value of <em>t</em>

(<em>n</em> - 1) = degrees of freedom

The information provided is:

<em>n</em> = 5

Confidence level = 95%

The critical value of <em>t</em> is:

t_{\alpha/2, (n-1)}=t_{0.05/2, (5-1)}

               =t_{0.025, 4}

               =2.776

*Use a <em>t</em>-table for the critical value of <em>t</em>.

Thus, the <em>t</em>-value used for the 95% confidence interval of paired data is 2.776.

4 0
2 years ago
Jessica has a bag with 2 mint sticks, 4 jelly treats, and 14 fruit tart chews. If she eats one piece every 9 minutes, what is th
weqwewe [10]
If you add all the numbers to gather you get 20 you said the first two fruit tart chew and a jelly treat what you do after you add all the numbers together is you look at what you trying to find out you you are trying to find out the fruit tart chew and jelly treat so you have 4 jelly treats and 14 fruit tar chew you add them together and you get 18 next you divide 18 by 2 and you get 0.9 
so your answer is 0.9 
hope it helps and hope get an a i wish you the best of luck
5 0
2 years ago
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