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3 years ago

Rewrite each number sentence using numerals and symbols. Find the difference between 4 and 3 and then add 7 *

Mathematics

1 answer:

Zina [86]3 years ago

8 0

Answer:

Step-by-step explanation:

4-3+7=8

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Gary is studying the prevalence of regional dialects. He surveyed 351 people in a region and asked what words they used for cert

chubhunter [2.5K]

Answer:

Confidence interval = ( 0.7991, 0.8647 )

Step-by-step explanation:

Sample size = n = 351

number of successes = X = 292

Sample proportion = P = $\frac{X}{n}$

= $\frac{292}{351}$

= 0.831908831

confidence interval = 90%

Critical Z value = 1.6449 [by using excel]

Confidence interval = P ± Z $\sqrt{P\frac{(1-P)}{n}}$

Where P = Sample proportion

Z = critical value

n = sample size

Confidence interval = 0.831908831 ± 1.6449 $\sqrt{0.831908831\frac{(1-0.831908831)}{351}}$

= 0.831908831 ± 1.6449 × 0.0200

= 0.831908831 ± 0.032898

Lower limit = 0.831908831 - 0.032898 = 0.7991

Upper limit = 0.831908831 + 0.032898 = 0.8647

Confidence interval = ( 0.7991, 0.8647 )

4 0

3 years ago

A) x = 30 b) x = 40 C) x = 45 70

tiny-mole [99]

Step-by-step explanation:

I would help i really would but I need more info discussing the topic im sorry but I can't answer it

5 0

3 years ago

Three vertices of a parallelogram are shown in the figure below. Give the coordinates of the fourth vertex.

topjm [15]

Given:

The three vertices of a parallelogram are (-3,8), (4,5), (2,-5).

To find:

The fourth vertex of the parallelogram.

Solution:

Let the vertices of the parallelogram are A(-3,8), B(4,5), C(2,-5) and D(a,b).

We know that, diagonals of a parallelogram bisect each other. It means midpoints of both diagonals are same.

Midpoint formula:

$Midpoint=\left(\dfrac{x_1+x_2}{2},\dfrac{y_1+y_2}{2}\right)$

Two diagonals of ABCD are AC and BD.

Midpoint of AC = Midpoint of BD

$\left(\dfrac{-3+2}{2},\dfrac{8-5}{2}\right)=\left(\dfrac{4+a}{2},\dfrac{5+b}{2}\right)$

$\left(\dfrac{-1}{2},\dfrac{3}{2}\right)=\left(\dfrac{4+a}{2},\dfrac{5+b}{2}\right)$

On comparing both sides, we get

$\dfrac{4+a}{2}=\dfrac{-1}{2}$

$4+a=-1$

$a=-1-4$

$a=-5$

And,

$\dfrac{5+b}{2}=\dfrac{3}{2}$

$5+b=3$

$b=3-5$

$b=-2$

Therefore, the coordinates of fourth vertex are (-5,-2).

3 0

2 years ago

The area of a room in a dollhouse is 1,248 square inches. The width of the room is 8 inches. How long is the room?

AveGali [126]

The length of the dollhouse is 156 square inches

6 0

3 years ago

Pleasseee hellp for brainleist answer and extra points if you correct the 2 first top rows

andrew-mc [135]

So close! But instead of adding the multiplication sign after the number you need to add them before. Good job though! :)

7 0

3 years ago

Read 2 more answers