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4 years ago

Estimate 3 1/3 - (-5) A.)-2 B.)-8 C.)2 D.)8

Mathematics

2 answers:

aniked [119]4 years ago

5 0

-8 is the answer because it equals 3 1/3 plus 5 because of the double negative

Anna35 [415]4 years ago

4 0

The answer would be 8

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I need help on this plzzz

NISA [10]

Answer:

see below

Step-by-step explanation:

The exterior angle is equal to the sum of the opposite interior angles.

139 = <Q + <P

= 6y+1 + 4y+8

= 10y+9

139 = 10y+9

Subtract 9 from each side

130 = 10y

Divide each side by 10

13 = y

<P = 4y+8 = 4*13+8 = 60

<Q = 6y+1 = 6*13+1 =79

QPR = We know this makes a straight line with 139

= 180-139 = 41

3 0

3 years ago

There is an average of 22.455 employees at 22 office furniture dealers in a major metropolitan area, with a standard deviation o

valina [46]

Answer:

The 99 percent confidence interval for the true mean number of full-time employees at office furniture dealers is (12.288, 32.622).

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.99}{2} = 0.005$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.005 = 0.995$ , so $z = 2.575$

Now, find M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

$M = 2.575*\frac{18.52}{\sqrt{22}} = 10.167$

The lower end of the interval is the mean subtracted by M. So it is 22.455 - 10.167 = 12.288

The upper end of the interval is the mean added to M. So it is 22.455 + 10.167 = 32.622

The 99 percent confidence interval for the true mean number of full-time employees at office furniture dealers is (12.288, 32.622).

4 0

3 years ago

Read 2 more answers

I REALLY NEED HELP

alex41 [277]

The area is 180ft I think. You can do (15*12)/2 = 90. Since it’s two triangles you then do 90*2. I hope I am right

4 0

3 years ago

Read 2 more answers

Ted buys <img src="https://tex.z-dn.net/?f=w" id="TexFormula1" title="w" alt="w" align="absmiddle" class="latex-formula"> blocks

LekaFEV [45]

Answer:

9750= 12w + 15z

W= 250

Z= 450

1 block of Mahogany is $450.

Step-by-step explanation:

6 0

3 years ago

Write the equation of a line that is perpendicular to the given line and that passes through the given point. y= 2/3x + 9 ; (–6,

matrenka [14]

Answer:

y = - $\frac{3}{2}$ x - 4

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

y = $\frac{2}{3}$ x + 9 ← is in slope- intercept form

with slope m = $\frac{2}{3}$

Given a line with slope m then the slope of a line perpendicular to it is

$m_{perpendicular}$ = - $\frac{1}{m}$ = - $\frac{1}{\frac{2}{3} }$ = - $\frac{3}{2}$ , thus

y = - $\frac{3}{2}$ x + c ← is the partial equation

To find c substitute (- 6, 5) into the partial equation

5 = 9 + c ⇒ c = 5 - 9 = - 4

y = - $\frac{3}{2}$ x - 4 ← equation of perpendicular line

5 0

3 years ago