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3 years ago

How do i solve this if i dont pass my math i lose my phone for a week got till tomorrow

Mathematics

1 answer:

Flura [38]3 years ago

6 0

Do you need an explanation of the work shown? The distance can be found by multiplying the rate by the time. as long as you know two of three parts, you can find the missing value. There is no problem shown in the picture?

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What is the product mentally of (ab + 3)(ab - 3)

AleksAgata [21]

Answer:

ab² - 9

Step-by-step explanation:

Given in the question an expression

(ab + 3)(ab - 3)

To product mentally we will use polynomial identity called

Difference of squares

here a = ab

b = 3

(ab + 3)(ab - 3) = ab² - 3² = ab² - 9

3 0

3 years ago

Read 2 more answers

(9× 3) = (__x 3) + (__x 3)<br> = __ + ____<br><br> = ___

alekssr [168]

Answer:

(4x3)+(5x3)=12+15=27

Step-by-step explanation:

You can multiple both by any number as long as it adds to nine. 4 plus 5=9.

You can also do 3+6=9, or 8+1=9

5 0

3 years ago

Write the solution set of the inequality |x + 2| < 5 in the interval notation

AysviL [449]

Hello here is a solution :
<span> |x + 2| < 5
-5</span>< x+2<5
-5-2 < x+2-2 <5-2
-7<x<3
<span>interval notation : open (-7) ; open(3)</span>

7 0

3 years ago

Here are summary statistics for randomly selected weights of newborn girls: n=185,

Anna11 [10]

Answer:

The confidence interval for the population mean μ is $32.487$

Step-by-step explanation:

Given :

Number of weights of newborn girls n=185.

Mean $\bar{x}=31.4$ hg

Standard deviation s=7.5 hg

Use a 95% confidence level i.e. cl=0.95

To find : What is the confidence interval for the population mean μ?

Solution :

Using t-distribution,

The degree of freedom $DF=n-1=185-1=184$

$\alpha=\frac{1-0.95}{2}$

$\alpha=0.025$

The t critical value is t=1.973.

The confidence interval build is

$CI=\bar{x}\pm(t\cdot \frac{s}{\sqrt{n}})$

Substitute the values,

$CI=31.4\pm(1.973\cdot \frac{7.5}{\sqrt{185}})$

$CI=31.4\pm(1.973\cdot 0.5514)$

$CI=31.4\pm(1.087)$

$31.4+1.087$

$32.487$

Therefore, the confidence interval for the population mean μ is $32.487$

6 0

3 years ago

Jillian owns 60% of the stock

Natalija [7]

Answer:

720 shares

Step-by-step explanation:

Find 60% of 1,200, to figure out how many shares Jillian has.

Change 60% to decimal

0.6

Multiply with the total shares

0.6 x 1,200 = 720

720 shares

3 0

3 years ago

Read 2 more answers