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Nookie1986 [14]
3 years ago
14

PLEASE HELP >?!

Mathematics
2 answers:
Vlada [557]3 years ago
8 0
I belive that the answer is C
riadik2000 [5.3K]3 years ago
6 0

Answer:

Option C : 7 +(-6) + (2+5)x

Step-by-step explanation:

Given :7 + 2(x – 3) + 5x

To Find :Which of the steps has an incorrect justification?

Solution :

7 + 2(x -3) + 5x

7 + 2x -6+ 5x

7-6+2x+ 5x

1+7x

So, Option C has an incorrect justification: 7 +(-6) + (2+5)x

Like terms can be added easily there is no need to apply distributive property .

Hence Option C has an incorrect justification

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Can you help me please
astraxan [27]

Answer:

There are 24 total outcomes.

Step-by-step explanation:

First, calculate the probabilities. Assuming this die is six-sided.

Probabilty of rolling a number on the wheel: 1/4, 4 total possibilities.

Probability of rolling a number on the die: 1/6, 6 total possibilities.

(1/4) * (1/6) = (1/24)

This shows 24 total outcomes. For extra understanding, this is shown below.

Spinner 2, Die 1

Spinner 2, Die 2

Spinner 2, Die 3

Spinner 2, Die 4

Spinner 2, Die 5

Spinner 2, Die 6

Repeat this for spinner 3, 4, and 5. This shows 6 * 4 or 24 total outcomes.

4 0
2 years ago
Question 4 Unsaved The price of a movie ticket is $8 for an adult and $5 for a child. The following equation represents the tota
FrozenT [24]

The equation c=8x+5y represents the total cost, c, of buying x number of adult tickets and y number of child tickets.

Express 5y:

5y=c-8x.

Now divide this equation by 5:

y=\dfrac{c-8x}{5}.

Answer: correct choice is A

5 0
3 years ago
Which model shows all of these numbers correctly placed one the number line
maks197457 [2]

Answer:

2nd

Step-by-step explanation:

bec 1\8  = 0.125 so it must be close more to 0

and the 1.33 is bigger than 1.25

4 0
2 years ago
Jose has saved $75 to take tutoring classes. He must pay a registration fee of $15 and then an additional $6 for each class.
bonufazy [111]

Answer:

15+6x=75

Step-by-step explanation:

15 is the starting fee and it is 6$ per class so it would be 6x+15=75

4 0
3 years ago
Read 2 more answers
The branch manager of an outlet (Store 1) of a nationwide
monitta

Answer:

1. ( 19.1416, 23.5384,)

2. (0.276348, 0.46651)

3. the sample size = 170.73 approximately 171

4. sample size = 334.07 approximately 334

5. sample of 334 should be taken by manager

Step-by-step explanation:

mean = bar x = 21.34 dollars

size of sample n = 70

standard deviation of sample = 9.22

we use t distribution as the population standard deviation is not known.

95% Confidence interval

1-α = 0.95

α = 0.05

degree of freedom = 70-1 = 69

α/2 = 0.025

using the t distribution tsble,

= 1.9949

confidence interval = 21.34+-1.9949*[\frac{9.22}{sqrt(70)}] \\

= 21.34 +- (1.9949*1.10200)

= 21.34 + 2.1984, 21.34 - 2.1984

= (23.5384, 19.1416)

the confidence interval of the mean amount spent at the supply store can be written as 19.1416<u<23.5384

2. sixe of those who only have a cat

p = 26/70 = 0.371429

at 90 % confidence interval,

1-α = 0.90

α = 0.10

we use the z table here

z(0.10/2) = Z(0.05)

= 1.645

0.371429+-1.645\sqrt} \frac{0.371429(1-0.371429)}{70}

= 0.371429 +-( 1.645 x 0.0578)

= 0.371429 + 0.095081, 0.371429 - 0.095081

= (0.276348, 0.46651)

3. sd = 10$

margin of erro,r e = 1.50$

α = 0.05

using z table

α/2 = Z0.025

= 1.96

sample size = 1.96² * 10² / 1.50²

= 3.8416 * 100/ 2.25

= 170.73

the sample size is approximately 171

d. we have 0.5 as sample proportion now

margin of error = 0.045

α = 0.10

Zα/2 = 0.05

= 1.645

sample size = 1.645²x0.5(1-0.5) / 0.045²

= 0.676506/0.002025

= 334. 07

sample size = 334

5.  sample of 334 should be taken by manager

3 0
3 years ago
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