1. 4b plus 6
2. 6n minus 3c
3. 10d plus e
Work inside the brackets first, and then you can multiply the two equations if they are able to be mutiplied...
Answer: C) 4.20
Explanation:
Multiply each value with its corresponding frequency:
- 1*450 = 450
- 10*35 = 350
- 50*10 = 500
- 100*4 = 400
- 400*1 = 400
Add up the products
450+350+500+400+400 = 2100
Then divide this over the total frequency (450+35+10+4+1 = 500)
So we get 2100/500 = 4.20 as the expected value.
Answer:
I think its 6
Step-by-step explanation:
2x+x+90=180
3x+90=180 subtract 90 both sides
3x=90 divide by 3 both sides
x=30
x is congruent to 2y
2y=30 divide by 2 both sides
y= 15
z+30=180 subtract 30 both sides
z=150
