Answer:
The values of x and y to the given equations are x=5 and y=7
Step-by-step explanation:
Given equations are 

To solve the given equations by elimination method :
Multiply the equation (1) into 2 we get

Multiply the equation (2) into 5 we get

Now subtracting the equations (3) and (4) we get


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Therefore x=5
Now substitute the value of x=5 in equation (1) we get
4(5)-5y=-15
20-5y=-15
-5y=-15-20
-5y=-35

Therefore y=7
The values are x=5 and y=7
Answer:A,C,E
Step-by-step explanation:I took the quiz
Answer:
Step-by-step explanation:
take 60 degree as reference angle
using cos rule
cos 60=adjacent/hypotenuse
1/2=80/x(do cross multiplication)
80*2=x
160=x
Answer:

Step-by-step explanation:
The given equation is :
d = 5x + 10xf
We need to solve the above equation for x.
Taking x common from RHS,
d=x(5+10f)
Dividing both sides by (5+10f),

Hence, this is the required value of x.