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3 years ago

How do i do this problem 0.25(x+4)-3=28

2 answers:

6 0

Distribute the .25 to get .25x + 1 - 3 = 28

Then simplify to get .25x - 2 = 28

Move the two to the right to get .25x = 30

Then divide to leave x: 30 / .25 = 120

X = 120

Alekssandra [29.7K]3 years ago

3 0

Answer:

$x = 120$

Step-by-step explanation:

We can break this down into a handful of steps.

$0.25(x+4)-3=28$

Firstly, you can simplify right off the bat via distribution.

$(0.25)(x)+(0.25)(4)+-3=28$

$0.25x+1+-3=28$

Then, combine like terms.

$(0.25x)+(1+-3)=28$

$0.25x+-2=28$

$0.25x-2=28$

By using the additive property of equality, add 2 to both sides of the equation.

$0.25x-2+2=28+2$

$0.25x=30$

Then, divide both sides by 0.25.

$\frac{0.25x}{0.25}$ = $\frac{30}{0.25}$

$x=120$

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ANEK [815]

Answer:

Check the explanation.

Step-by-step explanation:

As the graph of a linear function f passes through the point (-2,-10) and has a slope of 5/2.

As the slop-intercept form is given by:

$y = mx+b$

where m is the slope and b is the y-intercept.

substituting the values (-2, -10) and m = 5/2 in the slop-intercept form to determine y-intercept.

$y = mx+b$

$-10=\frac{5}{2}\left(-2\right)+b$

$-\frac{5}{2}\cdot \:2+b=-10$

$-5+b=-10$

$-5+b+5=-10+5$

$b=-5$

And the equation of the line in the slope-intercept form will be:

$y = mx+b$

putting b = -5 and slope = m = 5/2

$y = mx+b$

$y=\frac{5}{2}x+\left(-5\right)$

$y=\frac{5}{2}x-5$

Determining the zero of function.

As we know that the real zero of a function is the x‐intercept(s) of the graph of the function.

so let us determine the value of x (zero of function) by setting y = 0.

$0=\frac{5}{2}x-5$

$\frac{5}{2}x-5=0$

$\frac{5}{2}x=5$

$5x=10$

$x=2$

Therefore, the zeros of the function will be:

x = 2

3 0

3 years ago

Suppose that 3\%3%3, percent of over 200{,}000200,000200, comma, 000 books borrowed from a library in a year are downloaded. The

sleet_krkn [62]

Answer:

The mean of the sampling distribution of the proportion of downloaded books is 0.03 and the standard deviation is 0.0197.

Step-by-step explanation:

Central Limit Theorem

For a proportion p in a sample of size n, the sampling distribution of the sample proportion will be approximately normal with mean $\mu = p$ and standard deviation $s = \sqrt{\frac{p(1-p)}{n}}$