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tatyana61 [14]
3 years ago
11

HELP!!!!I don’t get it. I need an explanation.

Mathematics
1 answer:
mestny [16]3 years ago
5 0

Answer: 9 is  -1

11 is -2 and 13 is -2

Step-by-step explanation:

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Number 2 answer: 61.

Explanation:

You take the amount of 2-digit numbers there are (90) and subtract it from the amount of two digit numbers that are multiples of 5 and 7 (29). You should get 61.
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Solving equations How to find x
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You have to times 11 by 8
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3 years ago
5x + 2y = 12<br><br> 5x – 2y = 28<br> Solve by substitution
andrey2020 [161]

Answer:

Divide each term by  

5

and simplify.

Tap for more steps...

x

=

2

y

5

+

12

5

4

x

=

28

−

3

y

Replace all occurrences of  

x

in  

4

x

=

28

−

3

y

with  

2

y

5

+

12

5

.

x

=

2

y

5

+

12

5

4

(

2

y

5

+

12

5

)

=

28

−

3

y

Simplify  

4

(

2

y

5

+

12

5

)

.

Tap for more steps...

x

=

2

y

5

+

12

5

8

y

5

+

48

5

=

28

−

3

y

Move all terms in  

8

y

5

+

48

5

=

28

−

3

y

to the left side and simplify.

Tap for more steps...

x

=

2

y

5

+

12

5

23

(

y

−

4

)

5

=

0

Solve for  

y

in the second equation.

Tap for more steps...

x

=

2

y

5

+

12

5

y

=

4

Replace all occurrences of  

y

in  

x

=

2

y

5

+

12

5

with  

4

.

x

=

2

(

4

)

5

+

12

5

y

=

4

Simplify  

2

(

4

)

5

+

12

5

.

Tap for more steps...

x

=

4

y

=

4

The solution to the system of equations can be represented as a point.

(

4

,

4

)

The result can be shown in multiple forms.

Point Form:

(

4

,

4

)

Equation Form:

x

=

4

,

y

=

4

Step-by-step explanation:

7 0
3 years ago
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riadik2000 [5.3K]
(2.32a) + (1.65b) = 31.42
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4 years ago
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