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4 years ago

3х + 4 = 2х +6 What is the answer

Mathematics

1 answer:

AnnyKZ [126]4 years ago

8 0

Answer:

x=2

Step-by-step explanation:

First step is to move the variable to one side. To do this, subtract 2x to both sides since it's the smaller amount.

3x+4= 2x+6

-2x -2x

Then, subtract 4 to both sides.

x+4= 6

-4 -4

This will leave you with the answer of x=2.

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A courier service company wishes to estimate the proportion of people in various states that will use its services. Suppose the

Svetradugi [14.3K]

Answer:

The probability that the sample proportion will be less than 0.05 is 0.80511.

Step-by-step explanation:

We are given that a courier service company wishes to estimate the proportion of people in various states that will use its services.

Suppose the true proportion is 0.04 and 349 are sampled.

Let $\hat p$ = sample proportion

The z score probability distribution for sample proportion is given by;

Z = $\frac{\hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ ~ N(0,1)

where, $\hat p$ = sample proportion

n = sample size = 349

p = population proportion = 0.04

Now, the probability that the sample proportion will be less than 0.05 is given by = P( $\hat p$ < 0.05)

P( $\hat p$ < 0.05) = P( $\frac{\hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ < $\frac{0.05-0.04}{\sqrt{\frac{0.05(1-0.05)}{349} } }$ ) = P(Z < 0.86) = 0.80511

The above probability is calculated by looking at the value of x = 0.86 from the z table which has an area of 0.80511.

Hence, the probability that the sample proportion will be less than 0.05 is 0.80511.

5 0

4 years ago

PLEASE ANSWER ASAP! ANSWER MUST MUST MUST MMMMUUUUSSSSTTTTTT INCLUDE AN EXPLANATION IN ORDER TO RECEIVE POINTS AND THE BRAINLIES

Aleks [24]

The answer is 4/7. see it from the multiple of 3...3*4 =12 and 3*7= 21. So this is the answer: 4/7.

4 0

3 years ago

A bridge over a gorge is supported by an arch in the shape of a semi-ellipse. The length of the bridge is 400 ft. and the maximu

Hitman42 [59]

Answer:

The height of the arch 50ft from the center is 97ft

Step-by-step explanation:

A bridge over a gorge is supported by an arch in the shape of a semi-ellipse

The length of the bridge is 400 ft. and the maximum height is 100 ft

so, a=200ft

b=100ft

(a)

we can draw picture

(b)

now, we can use equation of ellipse formula

$\frac{x^2}{a^2}+ \frac{y^2}{b^2}=1$

now, we can plug

a=200

b=100

$\frac{x^2}{200^2}+ \frac{y^2}{100^2}=1$

we can plug x=50 and find y

$\frac{50^2}{200^2}+ \frac{y^2}{100^2}=1$

$y=25\sqrt{15}$

$y=97ft$

6 0

3 years ago

PLEASE HELPPPPP!!! GIVING BRAINLIEST!!!!

lina2011 [118]

The integers that make the linear equation false are:

3, 78, and 126

We found that by evaluating the equation in all the options.

<h3>Which integers make the equation false?</h3>

Here we have the linear equation:

8m - 15 = 5m + 63

And the possible solutions are:

S: {3, 26, 78, 126}

To see which of these integers make the equation false, we can replace the value of m by the given values and see when the equation is false (the number in the left is different to the one in the right).

if m = 3

8*3 - 15 = 5*3 + 63

9 = 78 this is false.

if m = 26

8*26 - 15 = 5*26 + 63

193 = 193 this is true.

if m = 78

8*78 - 15 = 5*78 + 63

609 = 453 this is false.

if m= 126

8*126 - 15 = 5*126 + 63

993 = 693 this is false.

So the integers that make the equation false are:

3, 78, and 126.

Learn more about linear equations:

brainly.com/question/1884491

#SPJ1

5 0

1 year ago

I need help please!!!!!!

umka21 [38]

Answer:

432 feet^2

Step-by-step explanation:

If we fill in the edges, it'll be 24x8, since 16+2 is 18, and 20+2(2) is 24. 24x18 is 432. Brainliest please.

8 0

2 years ago

Read 2 more answers