All categories

3 years ago

What is 9/7 multiplied by (-9/5)

Mathematics

2 answers:

barxatty [35]3 years ago

8 0

Answer:

-2.31

Step-by-step explanation:

9/7 multiplied by (-9/5) is -2.31.

You first have to change the denominator into a common factor that each fraction has in common.

Then you just multiply them to get -2.31.

Yuki888 [10]3 years ago

5 0

The answer is -2.31.

You might be interested in

Select the expressions that are equivalent to 2(9r)

pashok25 [27]

Answer:

18r

Step-by-step explanation:

Multiply 9 by 2

5 0

3 years ago

List the first 4 terms of the sequence 3n² + 1

Ganezh [65]

Answer:

4, 13, 28, 49

Step-by-step explanation:

1st term = 3 × (1)² + 1 = 4

2nd term = 3 × (2)² + 1 = 13

3rd term = 3 × (3)² + 1 = 28

4th term = 3 × (4)² + 1 = 49

3 0

3 years ago

Read 2 more answers

Pls hurry , timed test

Vesnalui [34]

Answer:

Step-by-step explanation:

4 0

3 years ago

An architect is designing a gym for a new elementary

Liono4ka [1.6K]

Answer:

Step-by-step explanation: 60x116=6960

7 0

3 years ago

Read 2 more answers

Which of the following expressions is equivalent to a3 + b3?

lubasha [3.4K]

ANSWER
${a}^{3} + {b}^{3} = (a + b)( {a}^{2 } - ab + {b}^{2} )$

EXPLANATION

To find the expression that is equivalent to
${a}^{3} + {b}^{3}$
we must first expand
${(a + b)}^{3}$
Then we rearrange to find the required expression.

So let's get started.

${(a + b)}^{3} = (a + b) {(a + b)}^{2}$

We expand the parenthesis on the right hand side to get,

${(a + b)}^{3} = (a + b) ( {a}^{2} + 2ab + {b}^{2} )$

We expand again to obtain,

${(a + b)}^{3} = {a}^{3} + 3 {a}^{2}b + 3a {b}^{2} + {b}^{3}$

Let us group the cubed terms on the right hand side to get,

${(a + b)}^{3} = {a}^{3} + {b}^{3} + 3 {a}^{2}b + 3a {b}^{2}$

${(a + b)}^{3} = {a}^{3} + {b}^{3} + 3ab (a+ b)$

We make the cubed terms the subject,

${(a + b)}^{3} - 3ab (a+ b) = {a}^{3} + {b}^{3}$

We factor to get,

$(a + b)({(a + b)}^{2} - 3ab ) = {a}^{3} + {b}^{3}$

We expand the bracket on the left hand side to get,

$(a + b)( {a}^{2} + 2ab + {b}^{2} - 3ab ) = {a}^{3} + {b}^{3}$

We finally simplify to get,

$(a + b)( {a}^{2} - ab + {b}^{2} ) = {a}^{3} + {b}^{3}$

5 0

3 years ago

Read 2 more answers