Solve it by substitution. First let's rewrite the first equation (3x+4y=16) so we have y = something, then we'll substitue that in to the other equation.
3x+4y=16
4y=-3x+16
y=-3/4x+4
Now we can substitute this into the other equation.
7 it’s 7 because I did this already and remembered the answer to it
The area of a trapezpid is 1/2h×(b1+b2)
The answer is x= 3.666 or 3 2/3
Answer:
102 un²
Step-by-step explanation:
Area surface = 4( 3 x 7 ) + 2( 3 x 3 )
4( 21 )+ 2( 9 ) =
84 + 18 = 102 un²
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-Chetan K