Answer:
7
Step-by-step explanation:
a=2
b=2
c=1
2ab cos C=a²+b²-c²=2²+2²-1²=4+4-1=7
For this problem, we will take the given information and use it to create an expression representing the problem. We want the expression to equal the amount Dylan has.
Let's start by defining a variable.
d=dollars Leo has
We know that Dylan has 3 more dollars than twice the amount Leo has. We can take this information and create our expression.
2d+3 is our expression.
We multiply our variable by 2 and then add 3 since Dylan has twice the amount Leo has plus an addition of 3 more dollars.
Therefore, the solution is 2d+3.
Answer:
A. 90°+m∠4
Step-by-step explanation:
Also
∠
A
+
∠
C
=
180 o
=
∠
B
+
∠
D
⇒
2
x+
(
3
x
−
5
)
=
180 0
=
(
x
+
5
)
+ ∠ C
5
x − 5 = 180
Add 5 to both sides
5
x = 185
Divide both sides by 5
x = 185 5 = 37
But it was A. 90°+m∠4
