6b < 42 implies b < 42 / 6 = 7, so it is <span>b < 7
</span>4b + 12 > 8 implies 4b > 8 - 12 = -4, 4b > -4, and then b > -4 / 4 = - 1
the answe is <span>b < 7 or b > -1 </span>
14 7 7 6 5 5 4 4 4 4 2 2 1 / 3 3 3 4 4 3 44 3. 4 4
Answer:
see explanation
Step-by-step explanation:
Given the 2 equations
y = x² + 2x + 7 → (1)
y - 7 = x → (2)
Rearrange (2) expressing y in terms of x by adding 7 to both sides
y = x + 7 → (3)
Substitute y = x + 7 into (1)
x + 7 = x² + 2x + 7 ( subtract x + 7 from both sides )
0 = x² + x ← factor out x from each term
0 = x(x + 1)
Equate each factor to zero and solve for x
x = 0
x + 1 = 0 ⇒ x = - 1
Substitute these values into (3) for corresponding values of y
x = 0 → y = 0 + 7 = 7
x = - 1 → y = - 1 + 7 = 6
The solutions are
(- 1, 6 ) and (0, 7 )
Answer:
A
Step-by-step explanation:
I'm not entirely sure but please let me know if I'm right
