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3 years ago

1. Is -7+9=-9+7 true, false , or open?

Mathematics

2 answers:

jeka57 [31]3 years ago

8 0

1. Is B

2. Is C

3. Is C

4. Is A

Tju [1.3M]3 years ago

6 0

1. false

2. idk

3. its C

4. idk

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Ivan and Tanya share £150 in the ration of 4:1

Zarrin [17]

Answer:

Money Ivan gets extra = 120 - 30 (or 3x) = 90

Step-by-step explanation:

Ivan = 4x

Tanya = 1x

Total = 150

4x + x = 150

5x = 150 ; x = 150 / 5 = 30

Ivan = 4x = 120

Tanya = 1x = 30

Money Ivan gets extra = 120 - 30 (or 3x) = 90

8 0

3 years ago

If p represents “a number is divisible by 2,” q represents “a number is odd,” and r represents “a number is even,” what does thi

oee [108]

Answer:

Step-by-step explanation:

idk y but still ur teacher can't do anything

3 0

3 years ago

△ABC has vertices at A(1, 1), B(2, 3), and C(3, 1). △DEF has vertices at D(–1, 1) , E(–2, 4), and F(–3, 1). Is △ABC congruent to

SVETLANKA909090 [29]

Answer:

sorry I don't know understand

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4 years ago

Find the critical numbers of the function. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE

nalin [4]

First we have to find the derivative of the function:
f ` ( x ) = ( ln x / x^6 ) ` =
= $\frac{ \frac{1}{x} x^{6}- 6 x^{5}ln x }{ x^{12} } = \\ \frac{ x^{5}(1-6lnx) }{ x^{12} }= \\ \frac{1-6lnx}{ x^{7} }$
The critical point is when f ` ( x ) = 0
1 - 6 ln x = 0
6 ln x = 1
ln x = 1/6
$x = \sqrt[6]{e}$
f ( e^(1/6)) = e^(-1) * 1/6 = 1 / (6 e)
Answer:
$( \sqrt[6]{e}; \frac{1}{6e} )$

7 0

4 years ago

. Choose the correct means and standard deviations for the Sincere and Insincere conditions. Make sure to round to two decimal p

tensa zangetsu [6.8K]

Answer:

C. The rudely disagrees condition has a mean of 4.16 and a standard deviation of 0.85 while the politely disagrees condition has a mean of 3.82 and standard deviation of 0.97

Step-by-step explanation:

The given data is

x` Std. Dev

R. disagrees 4.16 0.854

P. disagrees 3.82 0.967

From this data we see that the R. disagrees has a mean of 4.16 and standard deviation of 0.854

while

the P. disagrees has a mean of 3.82 and standard deviation of 0.967.

Same figures are given only in option C because

Rounding 0.854 gives 0.85

Rounding 0.967 gives 0.97

So only option C is the best choice.

C. The R. Disagrees condition has a mean of 4.16 and a standard deviation of 0.85 while the P. Disagrees condition has a mean of 3.82 and standard deviation of 0.97

8 0

3 years ago