Answer:
-13
Step-by-step explanation:
Let x and y be the length and width of the rectangle respectively
2(x+y)=32...(1)
x=2y-5...(2)
From (1),we have
2x+2y=32...(3)
By sub.(2) into (3),we have
2(2y-5)+2y=32
4y-10+2y=32
6y=42
y=7
By sub.y=7 into (2),we have
x=2*7-5
x=14-5
x=9
Length =9m
Width =7m
I have attached a screenshot of the question along with the available choices.
Answer:∠A = 78°
Explanation:We are given that ΔABC is isosceles-angled triangle.
This means that:
AB = AC
∠ABC = ∠ACB
We are given that ∠ABC = 51°
This means that ∠ACB = 51°
Now, the sum of measures of the angles of a triangle = 180°
This means that:
∠A + ∠ABC + ∠ACB = 180
∠A + 51 + 51 = 180
∠A + 102 = 180
∠A = 180 - 102
∠A = 78°
Hope this helps :)