Answer:
5p4 = 120
Step-by-step explanation:
nPr
Where n=5 and r =4
(5!) ÷ (5-4)!= (5*4*3*2*1)÷(1)=120
Hope this picture helps! ;) Ignore the stuff around it ($12 or the triangle)
Answer:
28
Step-by-step explanation:
We use the concept of similarity to find the value of X.
Δ APR ≡ ΔCDR
∴ AR/CR = PR/DR
(10+x)/x = (15+42)/42
42(10+x) = 57x
420 + 42x = 57x
57x - 42x = 420
15x = 420
x = 420/15
= 28
Okay, to start off using a number line is always useful. Negative 4 plus 5 equals 1, if it dropped by 30 which is subtracting 30 from 1 it takes 1 out of the positive zone to the negative. Which equals to negative 29.
