Answer:
(1 
, 2 )
Step-by-step explanation:
Given the 2 equations
7x - y = 7 → (1)
x + 2y = 6 → (2)
Multiplying (1) by 2 and adding to (2) will eliminate the y- term
14x - 2y = 14 → (3)
Add (2) and (3) term by term to eliminate y
15x = 20 ( divide both sides by 15 )
x = 
= 
= 1
Substitute this value of x into either of the 2 equations and solve for y
Substituting in (2)
+ 2y = 6
2y = 6 - = 
( divide both sides by 2 )
y = 
= 2
The surface area of the composite figure is 524 square meters
<h3>Surface area of a figure</h3>
The given composite figure is made up of a triangular prism and a rectangular prism. The surface area of the figure is given as:
Surface area = 2(16*5+5*4+16*4) + (16*6) + 2(50)
Take the sum
Surface area = 2(80+20+64) + 96 + 100
Surface area = 2(164) +196
Surface area = 328 + 196
Surface area = 524 square meters
Hence the surface area of the composite figure is 524 square meters
Learn more on surface area here: brainly.com/question/1297098
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Answer:
128
Step-by-step explanation:
Split the shape into a triangle and a rectangle.
The base of the triangle is 12 cm.
The height of the triangle is the height of the whole shape minus the height of the rectangle, which is: 14-11=3.
We know that the formula for the area of a triangle is 0.5xbxh
Therefore, the area of the triangle is 0.5x12x3 = 18.
NOW, lets work out the area of the rectangle.
The formula for the area of the rectangle is bxh.
= 11*10
= 110.
Now you add the area of the triangle to the area of the rectangle
18+110.
= 128.
Answer:
A)10.25 cm ; B)5 square cm
Step-by-step explanation:
A)
Formula:
p=(a+b+c) [p= perimeter ; a,b , and c are the side lengths.]
∴The perimeter of the triangle =(4+2.75+3.5) cm
=10.25 cm
B)
Formula:
A = 1/2 . b .h [A=area ; b= base ; h= height]
∴The area of the triangle = (1/2 . 4 . 2.5) square cm [b=4 ; h=2.5]
=5 square cm
We can not find the answer unless we have the height of the brother.
