Answer: 9 / 20
Step-by-step explanation:
Convert both of the fractions to decimals and then sum them up.
= 2/10 = 0.2
= 25/100 = 0.25
= 0.2 + 0.25
= 0.45
The convert this figure back to fractions.
As it is 2 digits after the decimal, it is over 100 when converted.
= 45 / 100
Take it to the lowest term:
= 45 / 100 ÷ 5
= 9 / 20
So on number 2 u can put 7x-3 equals -21
and on number 3 u can put that you need to subtract the 7 from both sides so thats where you get -3 on the left side and on number 4 you can put that you need to divide by negative 3 to get the answer which is 7
The numbers of choices in each category are multiplied together. We assume the order of paint choices matters: using color 1 in area A and color 2 in area B is not the same as using color 2 in area A and color 1 in area B.
P(7,2)*4*3*2 = 42*4*3*2 = 1008 ways
_____
P(n, k) = n!/(n-k)!
P(7, 2) = 7*6 = 42
Answer: 40º
Step-by-step explanation:
To find angle c, not give 2 angles at least, we must use a trigonometric function. With respect to angle c, we can see that we have the opposite and adjacent sides.
The trigonometric function that relates opposite and adjacent sides is tangent.
![tan=\frac{opposite}{adjacent}](https://tex.z-dn.net/?f=tan%3D%5Cfrac%7Bopposite%7D%7Badjacent%7D)
![tan=\frac{21}{25}](https://tex.z-dn.net/?f=tan%3D%5Cfrac%7B21%7D%7B25%7D)
![tan^-^1=40](https://tex.z-dn.net/?f=tan%5E-%5E1%3D40)