Answer:
f(-2) = 3
Step-by-step explanation:
f(x) = x² + 3x +5
f(-2)=(-2)² + 3*(-2)+5
= 4 - 6 +5
= 3
Yes because they are all even
Answer:
x>-7
Step-by-step explanation:
2x+3>-11
subtract 3 on both sides
2x>-14
divide by 2 on both sides
x>-7
Note: When dividing or multiplying by a negative number, be sure to flip the inequality symbol!
<span><span>4a+6b=10
4a=10-6b
a=(10-6b)/4
a=(5-3b)/2
</span>
<span>2a-4b=12
2((5-3b)/2)-4b=12
(5-3b)-4b=12
5-7b=12
-7b=7
b=-1
</span>
<span>2a-4b=12
2a-4(-1)=12
2a+4=12
2a=8
a=4
a=4, b=-1 </span>
12a=48</span>
