3 years ago

Which property is shown? 2.3 + (-1.2 + 9.6) = (2.3+ (-1.2)) + 9.6

Mathematics

1 answer:

abruzzese [7]3 years ago

6 0

Answer:

Associative property of addition

Step-by-step explanation:

A change of grouping is the associative property of addition.

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Solve the proportion.

Lostsunrise [7]

Answer:

r = 9

Step-by-step explanation:

cross multiply

9 * r = 81

9r = 81

divide both sides by 9

r= 81/9

r = 9

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2 years ago

Subtract. Write your answer in simplest form.<br> 5/- 10/5

tigry1 [53]

Answer:

-1/10

Step-by-step explanation:

(5/(-10))/5 = -(5/10)/5 = 1/10

(Hopefully this helped you out!)

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2 years ago

It takes 36 minutes for 7people to paint 4 walls. How many minutes does it take how many minutes does it take for nine people to

Neporo4naja [7]

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3 years ago

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fenix001 [56]

80

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2 years ago

2. in a class of 50 students, the number of females is 2 more than 5 times the number of males. How many males and females are t

Ber [7]

Answer:

There are 8 males in the class and 42 females.

Step-by-step explanation:

This question can be solved using a system of equations.

I am going to say that:

x is the number of females.

y is the number of males.

Class of 50 students

This means that $x + y = 50$

The number of females is 2 more than 5 times the number of males.

This means that $x = 5y + 2$

So, finding y, the number of males:

$x + y = 50$

$5y + 2 + y = 50$

$6y = 48$

$y = \frac{48}{6}$

$y = 8$

Females:

$x = 5y + 2 = 5*8 + 2 = 42$

There are 8 males in the class and 42 females.

7 0

2 years ago