Pls help!!solve for x y=2x+48solve for yy=9x+13

Mathematics

2 answers:

8090 [49]3 years ago

7 0

Wait is it a system of equation or you just want the expression of X and Y

natali 33 [55]3 years ago

4 0

Y = 2x + 48
-1 (y = 9x + 13)
---------------------
y = 2x + 48
-y = -9x -13
-------------------
0 = -7x + 35
+7x = +7x
--------------------
7x = 35

x = 5

y = 2x + 48
y = 2(5) + 48
y = 10 + 48
y = 58

x is 5
y is 58

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Step-by-step explanation:

Let S denotes the total number of people surveyed, A denotes the event of having dog , B denotes the event of having cats and C denotes the event of having fish.

Given : n(S)=50 ;n(A)=11 ; n(B) =13 and n(C)=6

Also, n(A∩B)=5 ; n(A∩C) = 2 and n(B∩C)=3 and n(A∩B∩C)=1

We know that,

$n(A\cup B\cup C)=n(A)+n(B)+n(C)-n(A \cap B)-n(A \cap C)-n(B \cap C)-n(A \cap B\cap C)\\\\=11+13+6-5-2-3+1=21$