A = (1/2) b * h
h = b - 5
42 = (1/2) * b * (b - 5)
42 = (1/2) * b^2 - 5b
multiply both sides by 2 to clear the fraction (1/2)
2(42) = 2(1/2) *b^2 - 5b
84 = b^2 -5b
Since this is a quadratic equation, subtract 84 from both sides so that it is set = to zero.
b^2 - 5b - 84 = 0
Now factor.
(b - 12)(b + 5) = 0
b - 12 = 0; b = 12
b + 5 = 0; b = -5
You can't have a negative length so the answer is 12m
To check the answer:
A = (1/2) * 12* 7
A = 42 m^2
Answer:
20%
Step-by-step explanation:
25 divided by 5 = 5
Convert to decimal
0.20
Convert to percentage
20%
Answer:
i think it means karma
Step-by-step explanation:
when you do something bad, later on down the road something bad will happen to you.
the distance between cd rounded to the nearest tenth is ≈ 7
Answer:
=5w3+8w2−10w+2
Step-by-step explanation:
Simplify
1
Distribute
2
(
2
+
3
−
5
)
+
3
3
+
2
(
2
+
1
)
2
3
+
6
2
−
1
0
+
3
3
+
2
(
2
+
1
)
2
Distribute
2
3
+
6
2
−
1
0
+
3
3
+
2
(
2
+
1
)
2
3
+
6
2
−
1
0
+
3
3
+
2
2
+
2
3
Combine like terms
2
3
+
6
2
−
1
0
+
3
3
+
2
2
+
2
5
3
+
6
2
−
1
0
+
2
2
+
2
4
Combine like terms
5
3
+
6
2
−
1
0
+
2
2
+
2
5
3
+
8
2
−
1
0
+
2
sorry if it don't make sense ;c
