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4 years ago

How to know if an equation is false, true, or an open scentence

2 answers:

7 0

To know when a equation is false, it is simply incorrect. When a equation is true, it will be correct. An open sentence is a statement which contains a variable, and becomes either true or false, depending on the value that replaces the variable. Hope this helps!

beks73 [17]4 years ago

4 0

Well it is true if the problem is the right with the right answer. If not you have a false eqaution.

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$42.78 divided by 3 what is the answer

Ber [7]

The answer is $14.26

7 0

4 years ago

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37. Use the equation below to answer parts a-c.

maw [93]

Answer:

Step-by-step explanation:

Here you go mate

Use PEMDAS

Parenthesis

Exponent

Multiplication

Division

Addition

Subtraction

Step 1

3(-2x+4) =-6x-12 Equation/Question

Step 2

3(-2x+4) =-6x-12 Remove parenthesis

-6x+12=-6x-12

Step 3

-6x+12=-6x-12 Add 6x to sides

12=-12

Step 4

12=-12 Subtract 12 from sides

-24=0

Answer

No solutions

Hope this helps

6 0

3 years ago

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b. Find a 99% confidence interval for mean age of ICU patients using the facts that, in the sample, the mean is 57.55 years and

rjkz [21]

Answer:

99% of confidence intervals for mean age of ICU patients

(53.8920 , 61.2079)

Step-by-step explanation:

Explanation:-

Given sample mean $x^{-} = 57.55$

Given standard error is determined by

S.E = $\frac{S.D}{\sqrt{n} }$

Given data standard error = 1.42

99% of confidence intervals for mean is determined by

$(x^{-} - Z_{0.01} \frac{S.D}{\sqrt{n} } , x^{-} + Z_{0.01} \frac{S.D}{\sqrt{n} } )$

$Z_{\frac{\alpha }{2} } = Z_{\frac{0.01}{2} } = Z_{0.05} = 2.576$

$(x^{-} - 2.576 S.E , x^{-} + 2.576 S.E)$

$(57.55 - 2.576X 1.42 , 57.55+ 2.576 X1.42)$

(53.8920 , 61.2079)

Conclusion:-

99% of confidence intervals for mean is determined by

(53.8920 , 61.2079)

5 0

3 years ago

What are the coordinates of point P on the directed line segment from R to Q such that P is 5/6 the length of the line segment f

GREYUIT [131]

All late but the answer is (-3.5, 2.3) :)

8 0

3 years ago

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A store is selling a hat at a 55 percent markup. The store originally paid $16 for the hat. What is the retail price of the hat?

AleksandrR [38]

Set up the proportion of $ on one side and percents on other. You can put x for the retail value of the hat and 16 on the bottom. Then on the other side put the percentage of the added markup plus 100% which is the original price on the top over 100%. It should be something like x/16 = 155/100. The cross multiply. (x)(100) = 100x and (16)(155) = 2480. Then divide 2480 by 100 to isolate the x. Your final answer will be x = 24.80 which is the retail price.

6 0

3 years ago

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