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Alenkinab [10]
3 years ago
14

All equations are identities, but not all identities are equations. True or false

Mathematics
2 answers:
Alex3 years ago
7 0

Answer:

False

Step-by-step explanation:

apex

Elenna [48]3 years ago
6 0

Answer:

Step-by-step explanation:

It is false that All equations are identities, but not all identities are equations, as all identities are equations, but only some equations are identities.

Identities are equations that are true no matter what the values are substituted for the variables present in the equation.

For example:  

8x=8x,

sinx=cos(x+\frac{\pi}{2}) are all identities.

And z=cosx+x^2 is an equation, but is not an identity.

Hence, The given statement is false.

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Lisa was trying to park her car. She moved her car forward at a constant velocity for 5 seconds, and then backward at a constant
Romashka [77]

Answer:

The last graph

Step-by-step explanation:

See attached image

6 0
4 years ago
Do one of the​ following, as appropriate.​ (a) Find the critical value z Subscript alpha divided by 2​, ​(b) find the critical v
babymother [125]

Answer:

We want to construct a confidence interval at 99% of confidence, so then the significance level would be 1-0.99 =0.01 and the value of \alpha/2 =0.005. And for this case since we know the population deviation is not appropiate use the t distribution since we know the population deviation and the best quantile assuming that the population is normally distributed is given by the z distribution.

And if we find the critical value in the normal standard distribution or excel and we got:

z_{\alpha/2}= \pm 2.576

And we can use the following excel code:

"=NORM.INV(0.005,0,1)"

Step-by-step explanation:

For this case we have the following info given:

\alpha=0.01, n =26, \sigma = 28.9

We want to construct a confidence interval at 99% of confidence, so then the significance level would be 1-0.99 =0.01 and the value of \alpha/2 =0.005. And for this case since we know the population deviation is not appropiate use the t distribution since we know the population deviation and the best quantile assuming that the population is normally distributed is given by the z distribution.

And if we find the critical value in the normal standard distribution or excel and we got:

z_{\alpha/2}= \pm 2.576

And we can use the following excel code:

"=NORM.INV(0.005,0,1)"

7 0
3 years ago
AB=BC<br> Find x:<br> thank you ❤️
AURORKA [14]

Answer:

x = 43

Step-by-step explanation:

3x - 31 = 2(x+6)

3x - 31 = 2x+ 12

x =43

8 0
3 years ago
I need it now please help
gulaghasi [49]
B. A smaller percentage of second-lunch students (38%) eat outside.
5 0
4 years ago
1. The total number of seats in an auditorium is modeled by f(x) = 2x2 – 6x, where x represents the number of rows. How many row
irakobra [83]

Answer:

Jose's solution is not correct, the auditorium has 16 rows

Step-by-step explanation:

we have

f(x)=2x^{2} -6x

where

f(x)------> is the total number of seats in an auditorium

x----> represents the number of rows

How many rows are there in the auditorium if it has a total of 416 seats?

Find the value of x for f(x)=416 seats

substitute the value of f(x) in the equation

416=2x^{2} -6x

2x^{2} -6x-416=0

Using a graphing calculator

The values of x are x=-13, x=16

The solution is

x=16 rows because the number of rows can not be a negative number

8 0
3 years ago
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