Answer:
D.
Step-by-step explanation:
The two types of angle measurements are:
1) Degrees ( ° )
2) Radians ( r)
Answers – Daniel is 13 years old; Ben is 33 years old
WORKINGS
Let Ben’s age be ‘x’
Let Daniel’s age be ‘y’
Given: Ben is 20 years older than Daniel
x = y + 20 ….. (Equation I)
Given: Three years ago, Ben was 3 times as old as Daniel.
x – 3 = 3(y – 3) ….. (Equation II)
Substitute ‘y + 20’ for x in Equation II
x – 3 = 3(y – 3)
(y + 20) – 3 = 3(y – 3)
y + 20 – 3 = 3y – 9
y + 17 = 3y – 9
3y – y = 17 + 9
2y = 26
y = 13
Daniel is 13 years old ….. (Answer I)
Substitute 13 for the value of ‘y’ in equation I
x = y +20
x = 13 + 20
x = 33
Ben is 33 years old ….. (Answer II)
Answer:
x = 
i
Step-by-step explanation:
We can write the following equation according to Euclidian Theorem to find the value of x:
= 12*9 multiply 9 and 12
= 108 find the root of both sides
x = is the value of x
Answer:
<h2>y²x² - 25</h2>
Step-by-step explanation:
To get the product of the function (y x - 5)(y x + 5), we will have to expand the bracket as shown;
= (y x - 5)(y x + 5)
= (yx)² + 5yx-5yx- 5(5)
= (yx)² + 5yx-5yx- 25
=(yx)² +0- 5(5)
= y²x² - 25
The product is expressed as y²x² - 25
3*2=6
6*6=36
36+4=40
40+10=50
