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belka [17]
3 years ago
7

What expression is equivalent to 4x-5-6x+7?

Mathematics
2 answers:
lesantik [10]3 years ago
4 0

Answer:

-2x + 2

Step-by-step explanation:

you didn't post choices but combining like terms you get

-2x + 2

myrzilka [38]3 years ago
3 0

Answer:

-2x +2

Step-by-step explanation:

Using a simplifiying property you get this answer. 4x -6x gives you -2x and -5+7 gives you +2

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The GPA of accounting students in a university is known to be normally distributed. A random sample of 20 accounting students re
Vladimir79 [104]

Answer:

The 95% of confidence intervals

(2.84 ,2.99)

Step-by-step explanation:

A random sample of 20 accounting students results in a mean of 2.92 and a standard deviation of 0.16

given small sample size n =20

sample mean x⁻ =2.92

sample standard deviation 'S' =0.16

level of significance ∝ =  0.95

The 95% of confidence intervals

x^{-}  ± t_{\alpha } \frac{S}{\sqrt{n} }

the degrees of freedom γ=n-1 =20-1=19

t-table 2.093

(x^{-}  - t_{\alpha } \frac{S}{\sqrt{n} },x^{-}  + t_{\alpha } \frac{S}{\sqrt{n} })

(2.92 - 2.093(\frac{0.16}{\sqrt{20} } ,2.92+2.093(\frac{0.16}{\sqrt{20} } )

(2.92-0.0748,2.92+0.0748)

(2.84 ,2.99)

Therefore the 95% of confidence intervals

(2.84 ,2.99)

4 0
3 years ago
Which properties does not belong with the other three?
Oksi-84 [34.3K]

Hi there!  

»»————- ★ ————-««

I believe your answer is:  

x - 6 = 5

»»————- ★ ————-««  

Here’s why:  

⸻⸻⸻⸻

I am assuming that '3=x divided by 3' is supposed to be 3 = \frac{x}{3}.

⸻⸻⸻⸻

The first, second, and fourth equations have x divided by a number. To isolate x, we would have to use the multiplication property of equality.

⸻⸻⸻⸻

For the third one (x-6=5), the variable 'x' is being subtracted by 6. We would have to use the addition property of equality to isolate x.

⸻⸻⸻⸻

»»————- ★ ————-««  

Hope this helps you. I apologize if it’s incorrect.  

8 0
3 years ago
Solve for x. Thank you
klasskru [66]

Answer:

Step-by-step explanation:

B/c  the bigger triangle is a copy of the smaller we can say

8\sqrt{3} / 12  = x / 8\sqrt{3}

then, solve for x

8\sqrt{3}(8\sqrt{3}/12) = x

(64 *3) 12 = x

192 /12 = x

16 = x

nice,  the first answer looks good , then :P

5 0
3 years ago
Read 2 more answers
Use order of operation 3³ - (60 ÷ 10) + 8
Vladimir [108]
The answer is 29

First you do 60/10 which is 6
After you do 3 x 3 x 3 which is 27.
Then you subtract 27-6 which is 21.
Last you do 21+8 and you get 29


3 0
4 years ago
Read 2 more answers
y is inversely proportional to a^3. When a=2, y=10. a is directly proportional to x. When x=4, a=20. Find a formula for y in ter
marshall27 [118]

Answer:

<h2>y = 16/25x³</h2>

Step-by-step explanation:

If y is inversely proportional to a^3, this is expressed as;

y∝1/a³

y = k/a³ where k is the proportionality constant

Given a=2, y=10, then 10 = k/2³

k = 10*2³

k = 80

Substituting k = 80 back into the formula;

y = 80/a³ ............. 1

Similarly, if a is directly proportional to x, then a ∝ x i.e a = kx

If x=4, a=20 then;

20 = 4k

k = 20/4

k = 5

Substituting k = 5 back into the formula;

a = 5x ....... 2

Substitute equation 2 into 1;

y = 80/a³

y = 80/(5x)³

y = 80/125x³

y = 16/25x³

<em>Hence the formula for y in terms of x is y = 16/25x³</em>

<em></em>

3 0
3 years ago
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