Answer:
A.
Step-by-step explanation:
C and D do not create any x² terms when doing the multiplications. so, they are out.
B stands for (a+b)×(a-b) = a² - b².
so, that would give us a "-4" at the end and is not fitting to the "+4" term at the end of the original expression.
that leaves us with A.
let's verify :
(4x+2i)(4x-2i)
it follows the same rule as B :
(a+b)(a-b) = a² - b²
a = 4x
b = 2i
you remember, i = sqrt(-1).
so, we get
(4x)² - (2i)² = 16x² - 4×(sqrt(-1))² = 16x² - 4×(-1) = 16x²+4
bingo !
Answer: 5.5 inches, 3.5 inches
Step-by-step explanation:
Given
Barry wants to make a drawing i.e. half the size of original
The length and width of the original drawing are 11 inches and 7 inches respectively.
So, the intended drawing is obtained by multiplying the original dimensions by
The length of barry's drawing is
The breadth of barry's drawing
Hello Kid!
The answer would be 144 units^2.
Hope this helps!
~Nadia~
Answer:
B and C are not the solution of y=3x-8
A and D are the solution of y=3x-8
Substitute x-values to the equation.
Remember that (x, y).
Given problem;
We are to make t, the subject of the expression v = u + at.
The equation is one of the equations of motion.
Usually, v is the final velocity, u is the initial velocity, a is the acceleration and t is the time taken.
To make "t" the subject of the expression; follow these steps;
v = u + at
- Subtract "u" from both sides;
v (-u) = u (-u) + at
2. the expression is now;
v - u = at
3. now multiply both sides by to isolate "t";
(v - u) = at x
t =