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STatiana [176]
3 years ago
9

5-(-3.8) + 1.5I don't understand how to work problems like this ​

Mathematics
2 answers:
Marizza181 [45]3 years ago
8 0
Okay when subtracting 2 negatives the number will be come positive. Using this question ur new equation will be
5+3.8+1.5. You just type in your calculator and get your answer.
The answer is 10.3! Hope this helped!
marissa [1.9K]3 years ago
6 0
10.3

When there is a in front of an expression in parentheses, change the sign of each term in the expression.

So it becomes 5 + 3.8 + 1.5
Now it’s just simple math....
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A soft-drink machine is regulated so that the amount of drink dispensed is approximately normally distributed with known standar
Vsevolod [243]

Answer:

This is  a reasonable decision because the sample size has no effect on the 90% confidence interval

Step-by-step explanation:

90% confidence interval

larger sample size = 20

condition : sample mean ( x-bar ) is the same for both samples

<em>This is  a reasonable decision because the sample size has no effect on the 90% confidence interva</em>l

<u>from condition 1 :</u>

Amount of drink dispensed is normally distributed with known standard deviation , given a random sample of n drinks and the sample mean at a confidence interval of 90%

<u>for condition 2 :</u>

sample size = 20

mean = 2.25 ( assumed value )

std = 0.15 ( assumed value )

Z = 1.645 ( Z-value )

determine the 90% confidence interval

= mean ± z \frac{std}{\sqrt{n} }

= 2.25 ± 1.645 \frac{0.15}{\sqrt{20} }

= 2.25 ± 0.0335 = ( 2.2835 , 2.2165 )

7 0
3 years ago
A fast-food company manufactures bags of chips. Every month there is a fixed cost on the ingredients and raw materials which is
GuDViN [60]
The total cost for the production of x bags of the chips is equal to the sum of the fixed cost, $1400, and the variable cost which is dependent on the number of bags produced. The final expression for the total cost,
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3 years ago
A baseball thrown upward at initial speed of 9.5m/s.
tamaranim1 [39]

Answer:

a) 0.4 s; b) 4.016 m

Step-by-step explanation:

a) Time to same height

\begin{array}{lrcl}(1) & h &=& -4.9t^{2} + 9.5t + 1\\(2) & h & = & -4.9t^{2} + 12t\\& 0 & = & 2.5t - 1\\& 1 & = & 2.5t\\& t & = & \dfrac{1}{2.5}\\\\& t & = & \textbf{0.4 s}\\\end{array}\\

b) Height

Insert the value of t into one of the equations.

h  = -4.9(0.4)^{2} + 12(0.4) = -4.9(0.16) +4.8 = -0.784 + 4.8 = \textbf{4.016 m}

The diagram below shows that the trajectories of the balls intersect after 0.4 s at a height of 4.016 m.

6 0
3 years ago
What is 2+2x2 wansheydycgdgzgzgs
Lera25 [3.4K]

Answer: 6

Step-by-step explanation:

2×2=4

4+2=6

5 0
3 years ago
Read 2 more answers
Is my answer correct? // tell me if im wrong!!
Aneli [31]

Answer:

I'm pretty sure your correct, but I'm not one hundred percent sure, sorry I couldn't be more help

Step-by-step explanation:

7 0
3 years ago
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