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4 years ago

SOMEONE PLEASE HELP ME WITH THESE 3 MATH QUESTIONS!!!!!

Mathematics

1 answer:

Len [333]4 years ago

7 0

Look at the pictures (examples)

m∠1 = m∠6 → answer: none

m∠2 = m∠3 → answer: none

m∠2 = m∠C → answer: none

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Question 22 of 49

kolezko [41]

Answer:

Step-by-step explanation:

It's less than 90 degrees

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4 years ago

) Si on multiplie les deux membres d'une inégalité par un même nombre négatif non nul, on obtient une inégalité de même sens.

iogann1982 [59]

Answer:

John has 9 different flags that he wants to hang on the wall. How many different ways can the flags be arranged in a row?

Step-by-step explanation:

John has 9 different flags that he wants to hang on the wall. How many different ways can the flags be arranged in a row?

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4 years ago

Need help finding the dimension to this

gladu [14]

D. 2,400 sq. ft. is the closest
1) Convert mixed numbers to improper fractions...
6 1/12 = 73/121 and 11 5/6 = 71/6

2) To get area of one tile, multiply length x width...73/121 times 71/6 = 5,183/72 = 72 sq. in. or 6 sq. ft.

3) 6 sq. ft. times 408 tiles = 2,448 sq. ft.

3 0

3 years ago

A regression was run to determine if there is a relationship between the happiness index (y) and life expectancy in years of a g

Natasha2012 [34]

Answer:

(A) $y=-0.762+0.119x$

(B) If a country increases its life expectancy, the happiness index will increase.

(C) If the life expectancy is increased by 3.5 years in a certain country, the happiness index will increase by 0.4165.

(D) If the life expectancy is 67 years in a certain country, the happiness index will be 7.21.

Step-by-step explanation:

A regression analysis was performed to determine if there is a relationship between the happiness index (y) and life expectancy in years of a given country (x).

The output of the regression analysis are as follows:

a = -0.762

b = 0.119

r² = 0.8649

r = 0.93

(A)

The equation of the Least Squares Regression line of the form y = _ + _ x is:

$y=-0.762+0.119x$

(B)

The correction between the variables happiness index (y) and life expectancy in years of a given country (x) is, 0.93.

The correlation coefficient is positive. This implies that there is a positive relation between the two variables, i.e. as the value of life expectancy in years increases the happiness index also increases.

Thus, if a country increases its life expectancy, the happiness index will increase.

(C)

Compute the value of y for x = x + 3.5 as follows:

$y=-0.762+0.119x$

$=-0.762+0.119\times (x+3.5)\\\\=(-0.762+0.119x)+0.4165\\\\=y+0.4165$

Thus, if the life expectancy is increased by 3.5 years in a certain country, the happiness index will increase by 0.4165.

(D)

Compute the value of y for x = 67 as follows:

$y=-0.762+0.119x$

$=-0.762+0.119\times 67\\\\=-0.762+7.973\\\\=7.211\\\\\approx 7.21$

Thus, if the life expectancy is 67 years in a certain country, the happiness index will be 7.21.

6 0

4 years ago

13. WRITE Math Write Standard Form, Expanded Form, and Word Form

attashe74 [19]

Answer:

Numbers can be written in different forms; examples of numbers written in standard form, expanded form and short word form are given below:

A. STANDARD FORM

(a). 81,326,412 = 8.1326412 * 10^7.

(b). 25,749,888 = 2.5749888 * 10^7.

(c). 93,782,514 = 9.3782514 * 10^7.

(d). 54,214,419 = 5.4214419 * 10^7.

(e). 97,222,119 = 9.7222119 * 10^7.

B. EXPANDED FORM

(a). 80,000,000 +1,000,000 +300,000 +20,000 + 6,000 +400 + 10 + 2.

(b). 20,000,000 + 5,000,000 + 700,000 + 40,000 + 9,000 + 800 + 80 + 8.

(c). 90,000,000 + 3,000,000 + 700,000 + 80,000 + 2,000 + 500 + 10 + 4.

(d). 50,000,000 + 4,000,000 + 200,000 + 10,000 + 4,000 + 400 + 10 + 9.

(e). 90,000,000 + 7,000,000 + 200,000 +20,000 + 2,000 + 100 + 10 + 9.

C. WORD FORM

(a). Eighty one million, three hundred and twenty six thousand, four hundred and twelve.

(b). Twenty five million, seven hundred and forty nine thousand, eight hundred and eighty eight.

(c). Ninety three million, seven hundred and eighty two thousand, five hundred and fourteen.

(d). Fifty four million, two hundred and fourteen thousand, four hundred and nineteen.

(e). Ninety seven million, two hundred and twenty two thousand, one hundred and nineteen.

7 0

3 years ago