Answer:
x = 50.53 degrees
Step-by-step explanation:
Q 1
Find length of BD using the sine Rule:-
5.6 / sin 78 = BD / sin 50
BD = 5.6 * sin 50 / sin 78
BD = 4.386 cm
Now consider triangle BDC
m < BDC = 180 - 78 = 102 degrees
Applying the sine Rule:-
9.3 / sin 102 = 4.386 / sin < BCD
sin BCD = sin 102 * 4.386 / 9.3
sin < BCD = 0.4613
m < BCD = 27.47 degrees
So m < x = 180 - 102 - 27.47 degrres
= 50.53 degrees
To answer this question you must make a come factor between the 2 fractions I believe the easiest way to do this is multiply the denominator or bottom number by the other one so 4*5 and 5*4 and what you do to the denominator you must do to the numerator so you would have to do 4*4 and 4*5 for the first fraction to get 16/20 and repeat on the other side 1*5 and 4*5 or 5/20 so the to fractions are 16/20+5/20 then add just the numerators 16+5=21 or 21/20 and simplify to 1/20
Answer:
- The function is injective but nor surjective
Step-by-step explanation:
<u>We see that:</u>
<u>For any x₁ and x₂ ∈ N, </u>
- f(x) = x₁³ = x₂³ ⇒ x₁ = x₂, both are natural numbers
It it confirmed one-to-one, hence it is injective
<u>Check the surjectivity:</u>
f(x) = y ∈ N
<u>Let y = 2, then:</u>
Since x is not natural, the function is not surjective