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3 years ago

27. Jennifer wants to simplify the expression (8x - 2). Which is an equivalent expression

Mathematics

2 answers:

Andrews [41]3 years ago

7 0

A 2x-8 that’swhat I thinks

DerKrebs [107]3 years ago

4 0

It's 2x-8 i had this in math yesterday

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What are the x and y- intercepts for the line 4(y+3)=−2(x+6)?

Strike441 [17]

The x-intercept is (-12, 0)
The y-intercept is (0, -6)
Let me know if you want to see how I answered it

5 0

3 years ago

I need help on knowing whether this is a solvable equation. Along with reasons why. HELP IF YOU CAN :))

leva [86]

To check if x = 9 is the solution, we need to replace every x with 9 and simplify

(3+x)/4 = 3

(3+9)/4 = 3

12/4 = 3

3 = 3

We get the same thing on both sides, so the last equation is a true equation. This means that the first equation is a true equation when x = 9. Therefore, the solution x = 9 is confirmed.

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3 years ago

(x + 3)^2 - 4x^2<br><br> Factorise using the difference of two squares

AlladinOne [14]

Answer:

3(x + 1)(3 - x).

Step-by-step explanation:

(x + 3)^2 - 4x^2

Using the identity a^2 - b^2 = (a - b)(a + b), we have

(x + 3 - 2x)(x + 3 + 2x)

= (-x + 3)(3x + 3)

= 3(x + 1)(3 - x)

8 0

3 years ago

Divide 4,000,000 in the ratio 2 is to 3 is to 4 is to 5 is to 6

dsp73

Answer:

Step-by-step explanation:

2+3+4+5+6=20

20/20=4,000,000

2/20=?

2/20×4,000,000÷20/20=400,000

20/20=4,000,00

3/20

3/20×4000000÷20/20=600,000

20/20=4,000,000

4/20

4/20×4,000,000÷20/20=800,000

20/20=4,000,000

5/20

5/20×4,000,000÷20/20=1,000,000

20/20=4,000,000

6/20

6/20×4,000,000÷20/20= 1,200,000

2:3:4:5:6=400,000 :600,000: 800,000 : 1,000,000: 1,200,000

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3 years ago

The standard deviation of the distribution of sample means is _______.

luda_lava [24]

Answer:

Standard error

Step-by-step explanation:

The standard deviation of the distribution of sample means is called the standard error of the means.

It is denoted by: $\sigma_{\bar X}$

The standard error is calculated using the formula: $\sigma_{\bar X}=\frac{\sigma}{\sqrt{n} }$

where n is the sample size and $\sigma$ is the population standard deviation.

6 0

3 years ago