Answer:
2x+3(10+x)
Step-by-step explanation:
I'm not sure but I think this might be the answer
Answer:
24feet 1 inches
Step-by-step explanation:
Answer:
(3, 10 ) and (7, 30 )
Step-by-step explanation:
Given the 2 equations
5x - y = 5 → (1)
2y - x² = 11 → (2)
Rearrange (1) expressing y in terms of x
y = 5x - 5 → (3)
Substitute y = 5x - 5 into (2)
2(5x - 5) - x² = 11
10x - 10 - x² = 11 ← rearrange into standard form
x² - 10x + 21 = 0 ← in standard form
(x - 3)(x - 7) = 0 ← in factored form
Equate each factor to zero and solve for x
x - 3 = 0 ⇒ x = 3
x - 7 = 0 ⇒ x = 7
Substitute these values into (3) for corresponding values of y
x = 3 → y = 5(3) - 5 = 15 - 5 = 10 ⇒ (3, 10 )
x = 7 → y = 5(7) - 5 = 35 - 5 = 30 ⇒ (7, 30 )
Answer:
x = 2, y = -1
Step-by-step explanation:
To find x, use elimination.
multiply everything in x - y = 3 by 2
(x - y = 3)2
that will now become 2x - 2y = 6
now line the equations up.
4x + 2y = 6
2x - 2y = 6
Now add everything going down.
4x + 2x is 6x, 2y and -2y cancel out, and 6 + 6 is 12. the equation is now:
6x = 12
divide on each side.
x = 2
to find y, substitute 2 into x - y = 3
2 - y = 3
-y = 1
y = -1