Register
PLEASE ANSWER QUICKLY!!!!!!!!!!!
155k views
0 votes
PLEASE ANSWER QUICKLY!!!!!!!!!!!

PLEASE ANSWER QUICKLY!!!!!!!!!!!-example-1
User Alexcei Shmakov
by
6.0k points

1 Answer

4 votes

21


(1)/(2) height \: of \: trapezium(a + b) = area \: of \: trapezium

half the height is 3

a=7

b=x

3(7+x)=84

21+3x=84

place the like terms on one side

84-21=3x

63=3x

x=21

User Ermir
by
4.6k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

5.6m questions

7.3m answers

Other Questions

What is the value of x? (-4) - x = 5
1/7 + 3/14 equivalent fractions
185g in the ratio 2:3
(3x1,000,000)+(3x100,000)+(2x100) what is this number written in standard form?
The function h = -t2 + 95 models the path of a ball thrown by a boy where h represents height, in feet, and t represents the time, in seconds, that the ball is in the air. Assuming the boy lives at sea
Link Copied!