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NISA [10]
3 years ago
6

Help me please answer correctly!!!

Mathematics
2 answers:
Darina [25.2K]3 years ago
7 0
You use substitution method by subtracting the (x) from both sides in the second equation and end up getting (y= -x+15) and substitute in the y and then once you get the y find the x
Jlenok [28]3 years ago
3 0
Seven adult tickets and eight kids tickets
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Two simple questions
frutty [35]
Oh i love these x=4,y=9
3 0
3 years ago
7) Solve the following system of equations below algebraically using substitution.
Pani-rosa [81]

Answer:

x = 3.25

y =4.75

Step-by-step explanation:

In order to Solve the following system of equations below algebraically using substitution method we say that;

let;

8x - 4y = 7 ..................... equation 1

x + y = 8.......................... equation 2

from equation2

x + y = 8.......................... equation 2

x = 8 - y.............................. equation 3

substitute for x in equation 1

8x - 4y = 7 ..................... equation 1

8(8-y) - 4y = 7

64-8y-4y=7

64-12y=7

collect the like terms

64-7 = 12y

57= 12y

divide both sides by the coefficient of y which is 12

57/12 = 12y/12

4.75 = y

y =4.75

put y = 4.75 in equation 3

x = 8 - y.............................. equation 3

x = 8 -4.75

x = 3.25

to check if your answer is correct, put the value of x and y in either equation 1 or 2

from equation 2

x + y = 8.......................... equation 2

3.25 + 4.75 =8

8=8.................... proved

8 0
3 years ago
Use suitable Identities and find <br>●( X - 5 ) ( x-5 )<br>●( 3x +2 ) (3x -2 )<br>●( 1+x )(1+x) ​
Nonamiya [84]

Answer:

.

Step-by-step explanation:

<h2><u>IdEnTiTy UsED</u></h2>

{x}^{2}  -  {y}^{2}  = (x + y)(x - y)

1)

(x  -  5)(x - 5)

=(x-5)²

2)

(3x - 2)(3x + 2)

{(3 x)}^{2}  -  {(2)}^{2}

= 9 {x}^{2}  - 4

3)

(1+x)(1+x)

= (1+x)²

6 0
3 years ago
Please help me out :( these confuse me
Pavel [41]

Answer:

The answer to your question is : 33.3 (Rounded).

Step-by-step explanation:

I got this answer by dividing 19.6 by 20, which gave me 0.98.

Then, I multiplied 0.98 by 34, which gave me 33.32.

After rounding, 33.3 is your answer.

Hope this helped!!

8 0
3 years ago
Read 2 more answers
O resultado da. Soma de (-26)com (+5) ?
zalisa [80]

Answer:

(-26) (+5)

=-+= -

it means -26-5

Answer 21

6 0
3 years ago
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