Answer:
N+F=42 & F+3N=70 System Solved: Natalie is 14 and Fred is 28
Step-by-step explanation:
Using variables N=natalies age and F=Freds age
N+F=42 ----> N=42-F (take this and plug it into the other equation)
F+3N=70 so F+3(42-F)=70 [simplify] F+126-3F=70 [further simplify]
-2F=-56 [divide -56 by -2] F=28 [then plug this number into the orig. equation]
So N+28=42 or N=14.

can also be written as 2i
where i = √-1

Rationalizing denominator,
Answer:
c 18
Step-by-step explanation:
Idid thsi in Kahn academy and got it correctly
Answer:
x=6
Step-by-step explanation:
3x-5=2x+1
x-5=1
x=6
STEP - BY - STEP EXPLANATION
What to find?
The the value of secθ.
Given:
(4, 3)
⇒(x, y) = (4, 3)
Step 1
Draw a sketch.
Step 2
Substitute the values into the trig. ratio formula below.

From the sketch above, opposite = 3 and adjacent = 4

Step 3
Find the value of the hypotenuse side using Pythagoras theorem.
let h be the hypotenuse side.

Hence, hypotenuse = 5
Step 4
Substitute the values into the formula below:

But,

ANSWER
secθ= 5/4
tanθ=3/4