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nataly862011 [7]

2 years ago

5

Whats thr answer to this? 3( -2d + 1) (pre alg)

1 answer:

sineoko [7]2 years ago

8 0

Answer:

here

Step-by-step explanation:

if all you're doing is distributing it, the answer is -6d + 3

You might be interested in

A sample of 25 undergraduates reported the following dollar amounts of entertainment expenses last year:

marin [14]

Answer:

$Range = 85$

$\sigma = 28.71$

$Interval = [666.78, 781.62]$

Step-by-step explanation:

Given

The data for 25 undergraduates

Solving (a): Range and Standard deviation

The range is:

$Range = Highest - Least$

From the dataset:

$Highest = 772$

$Least = 687$

So:

$Range = Highest - Least$

$Range = 772-687$

$Range = 85$

The standard deviation is:

$\sigma = \sqrt{\frac{\sum(x - \bar x)^2}{n}}$

First, calculate the mean

$\bar x = \frac{769 +691 +............+715}{25}$

$\bar x = \frac{18105}{25}$

$\bar x = 724.2$

So, the standard deviation is:

$\sigma = \sqrt{\frac{(769-724.2)^2 +(691-724.2)^2 +(699-724.2)^2 +(730-724.2)^2 +............+(715-724.2)^2}{25}}$

$\sigma = \sqrt{\frac{20604}{25}}$

$\sigma = \sqrt{824.16}$

$\sigma = 28.71$

Solving (b): The interval of the 95% of the observation.

Using the emperical rule, we have:

$Interval = [\bar x - 2*\sigma, \bar x+ 2*\sigma]$

$Interval = [724.2 - 2*28.71, 724.2 + 2*28.71]$

$Interval = [666.78, 781.62]$

4 0

2 years ago

I'm kinda stumped on this <br><br> Solve -4x + x = - 9/4

Kitty [74]

Answer:

x = 3/4

Step-by-step explanation:

It usually works well to collect terms first. (Add the coefficients of x.)

-4x +x = -9/4

(-4+1)x = -9/4

-3x = -9/4 . . . . . . equation with terms collected

Now, you can divide by the coefficient of x. Here, it can be useful to consider this to be the same as multiplying by the inverse of that coefficient, which inverse is -1/3.

(-1/3)(-3x) = (-1/3)(-9/4) . . . . . multiply both sides by -1/3

x = 3/4 . . . . . simplify

7 0

2 years ago

Ratio from men to women working for a company is 3 to 5.If there are 112 employees total, how many men work for the company?

Irina18 [472]

Answer:

About 67 men

Step-by-step explanation:

You multiply 112 by 3/5 or .6 to get 67.2 which rounds to 67 because there can not be .2 of a person.

7 0

2 years ago

Simplify the rational expression: x2 +6x-40/x+10<br> A. X-4<br> B. X+4<br> C. -X-4<br> D. -X+4

mariarad [96]

The answer is A I guess

5 0

2 years ago

The perimeter of a triangle is 65 cm. The

qwelly [4]

$▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪$

The longest side measures :

$27\: \: cm$

<h3> $\large \boxed{ \mathfrak{Explanation}}$ </h3>

Perimeter of a triangle is equal to sum of measures of its all three sides, that is :

$x + x + 8 + x + 12$

and according to the question, the perimeter of the triangle is = 65 cm

so, let's equate both the expressions to find value of x :

$x + x + 8 + x + 12 = 65$
$3x + 20 = 65$
$3x = 65 - 20$
$3x = 45$
$x = 45 \div 3$
$x = 15$

The longest side of the Triangle is :

$x + 12$
$15 + 12$
$27 \: \: cm$

6 0

2 years ago

Read 2 more answers