Answer=24 blue marbles and 3 red marbles
r=red marbles
b=blue marbles
b=3(r+5)
27=b+r
substitue b for '3(r+5)'
27=3(r+5)+r
27=3r+15+r
27=4r+15
subtract 15 from both sides
12=4r
divide both sides by 4
3=r
There are 3 red marbles
27=b+r
27=b+3
subtract 3 from both sides
24=b
There are 24 blue marbles
Answer:
Median = 12.5
Step-by-step explanation:
Median is the middle number of the data set from least to greatest.
Reorder the set from least to greatest:
2, 5, 9, 10, 15, 20, 20, 60
Median = (10+15)/2 = 12.5
Answer:
4.3 km
Step-by-step explanation:
The law of cosines can be used to find the desired distance. If we call the lighthouse position point L, then we have ...
CH² = LC² +LH² -2·LC·LH·cos(L)
CH² = 2² +2.5² -2·2·2.5·cos(143°) = 10.25 -10cos(143°) ≈ 18.2364
CH ≈ √18.2364 ≈ 4.27 . . . . km
The distance CH is about 4.3 km.
Answer:
Both of theses are irrational.
Step-by-step explanation:
The reason is because when you try to find out how to get the square root of 2 you get a whole bunch of numbers, and the same thing happens when you try to find the square root of 8. in turn both of these numbers are irrational.
Answer:
D) 1260°
Step-by-step explanation:
Total angle: (n - 2) × 180
Nonagon has 9 sides, so n = 9
(9 - 2) × 180 = 1260
