Answer:
t=0
Step-by-step explanation:
r=<+1,>
by differentiating the r vector component by component
r' = <2at, 1>
Two vector are orthogonal when the dot product between them is zero, so:
r'·r=0
<+1,>·<2at, 1>=2+2at+t=0
common factor
t(+2a+1)=0
Then, the only real value for t is zero.
-> t=0
Answer: The slope is 3.
Explanation: the slope is three because every point goes up by three (and over to the right one) in order to get to the next point on the graph
Answer:
x^4 - 10 x^3 + 23 x^2 + 20 x - 50
Step-by-step explanation:
https://www.wolframalpha.com/input/?i=simplify+(x-5)%5E2+*+(+x-+sqrt(2))*(+x%2B+sqrt(2))
Answer:
No
Step-by-step explanation:
5/3 : 1/6
No the ratio is 10:1 not 1:10
Answer:
There are 36 boys in the class.
Step-by-step explanation:
This question is solved by a system of equations.
I am going to say that:
x is the number of boys
y is the number of girls.
There are 42 pupils in a class.
This means that .
Since we want x, we have that
12 of them are Malays while the rest are Chinese. 1/4 of the boys and 1/2 of the girls are Malay.
This means that:
Since
Multiplying everything by 4.
There are 36 boys in the class.