Question

[7,8] is the difference between

Answer 1

Answer:

The value of $a$ is 3.

Step-by-step explanation:

Let be $\vec a = \langle a, 5 \rangle$ and $\vec b = \langle -4,-3 \rangle$, the difference between the two vectors is:

$\vec c = \vec b - \vec a$

$\vec c = \langle a, 5\rangle - \langle -4,-3 \rangle$

$\vec c = \langle a+4,8 \rangle$

If we know that $\vec c = \langle 7,8 \rangle$, the value of $a$ is:

$\langle 7, 8 \rangle = \langle a+4, 8\rangle$

In which,

$a + 4 = 7$

$a = 3$

The value of $a$ is 3.