Answer:
u * v = 39 ⇒ 2nd answer
Step-by-step explanation:
* Lets explain how to solve the problem
- u and v are two vectors
- u * v means the scalar product of the two vectors
- The scalar product is a way of multiplying vectors
- The result of a scalar product is always a number not a vector
- Ex: If u = ai + bj ⇒ <a , b> and v = ci + dj ⇒ <c , d> then the scalar
product of them is ac + bd where ac + bd is a number
* Lets solve the problem
∵ Vector u = 13j ⇒ <0 , 13>
∵ Vector v = i + 3j ⇒ <1 , 3>
- Lets find the scalar product
∴ u * v = (0)(1) + (13)(3)
∴ u * v = 0 + 39
∴ u * v = 39
Distance = 250 miles, time spent = 4.5 hours
AVERAGE SPEED = DISTANCE/TIME
So AVERAGE SPEED =250/4.5 = 55.55 mi/h. The closest is 56 mi/h
Like terms are either CONSTANTS, or they are terms with the same VARIABLE that have the same EXPONENT. Some examples: 9x and 5x are like terms because they both have the same variable (x) with the same exponent (1). however, 5 and 5x are not like terms, because one is a constant while the other has a variable. hope this helps you out
Answer:
20% sorry if im wrong
Step-by-step explanation:
