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nevsk [136]
3 years ago
9

-5 1/2 + 7 3/4 value of the expression

Mathematics
2 answers:
KatRina [158]3 years ago
5 0

Answer:

2 1/4.

Step-by-step explanation:

-5 1/2 + 7 3/4

= 7 3/4 - 5 1/2

= 7 - 5 + 3/4 - 1/2

= 2 + 1/4

=  2 1/4.

Irina18 [472]3 years ago
4 0

Answer:

2 1/4

Step-by-step explanation:

-11/2+7 3/4

-11/2 + 31/4

= 9/4

= 2 1/4

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5x-2y=-6 3x-4y = -26​
snow_tiger [21]

For this case we must solve the following system of equations:

5x-2y = -6\\3x-4y = -26

We multiply the first equation by -2:

-10x + 4y = 12

We add the new equation with the second one:

-10x + 3x + 4y-4y = 12-26

We have different signs subtracted and the sign of the major is placed:

-7x = -14\\x = \frac {-14} {- 7}\\x = 2

Now we find the value of the variable "y":

3x-4y = -26\\3 (2) -4y = -26\\6-4y = -26\\-4y = -26-6\\-4y = -32\\y = \frac {-32} {- 4}\\y = 8

Thus, the solution of the system is given by:

(x, y) :( 2,8)

Answer:

(x, y) :( 2,8)

3 0
3 years ago
Need Help!!!! Please!!! Explain!!!! Don't Understand!!!
Arturiano [62]

90  it is a right tranigle

6 0
3 years ago
In how many ways can Susan arrange 7 books into 5 slots on her bookshelf?
KatRina [158]

Answer:

  • 2520

Step-by-step explanation:

This is permutation question

<u>The formula for it: </u>

  • N = b!/(b-s)!, where N- number of ways, b- number of books, s- number of slots

<u>Finding the answer:</u>

  • N = 7!/(7-5)! = 7!/2! = 7*6*5*4*3 = 2520
7 0
3 years ago
Helppp plsssss!! Asap<br><br>Thanks
lubasha [3.4K]

Answer:

Ithink the answers B

Step-by-step explanation:

I think this because its even


3 0
3 years ago
Can someone help please
elena-s [515]

Answer:

I'm sorry I can help you maybe a little bit if that's okay. Btw what grade are you in?

Step-by-step explanation:

3 0
3 years ago
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