Answer:
The area of one trapezoidal face is 2 square inch
Step-by-step explanation:
Area of a trapezoid is calculated as follows:
A = (a + b)/2 * h
where a, b and h are the lengths of the top side, the base and the height, respectively. Replacing with data:
A = (1 + 3)/2 * 1
A = 2 square inch
The value of a is gotten from the equation 5a - 4 = 3a + 14 which gives a = 9
<h3>What is an
equation?</h3>
An equation is an expression that shows the relationship between two or more numbers and variables.
An independent variable is a variable that does not depend on other variables while a dependent variable is a variable that depends on other variables.
Y is between X and Z, hence:
XZ = XY + YZ
XY= 3a, XZ=5a-4, and YZ = 14, therefore substituting gives:
5a - 4 = 3a + 14
a = 9
The value of a is gotten from the equation 5a - 4 = 3a + 14 which gives a = 9
Find out more on equation at: brainly.com/question/2972832
#SPJ1
Start by expanding the first two brackets
(2+i)(3-i)
Multiply 2x3=6, then 2x I = 2i, then i x 3= 3i, then i x i= i2( i squared)
so it will be written as 6+2i+3i+i2( squared)
from here you can see that 2i and 3i can be added together to make 5i
so, 6+5i+i2(squared)
Then you bring in the third bracket from the question.
(6+5i+i2)(3+i)
6 x 3=18
6 x i= 6i
5i x 3=15i
5i x i=5i2(squared)
2x3=6
2x i= 2i
so you get 18+6i+15i+5i2(squared)+6+21
6i and 15i can be added together
18, 6 and 21 can be added together
so, 21i+5i2(squared)+45