Answer:
They each walked the same amount if you plug 7 into each of their expressions
Step-by-step explanation:
Karen walked 3(7) - 4 or 17 miles
Kristen walked 2(7) + 3 or 17 miles
Answer:
If you call the smaller integer "x" and the greater integer "y", then:
x+y=3x-11 The sum of the two is 11 less than 3 times the smaller
y=x+1 Because they are consecutive, the greater must be 1 more than the smaller
Then you can solve for x:
x+(x+1)=3x-11 Substitute x+1 for y
2x+1=3x-11 Combine like terms
2x+12=3x Add 11 to both sides
12=x Subtract 2x from both sides
The smaller integer is 12, thus the greater integer is 1 more or 13.
Check:
12+13=3(12)-11
25=36-11
25=25 Yes, so the integers are 12 and 13
Step-by-step explanation:
thats pretty much it
Answer:
-240
Step-by-step explanation:
1/4x=-60
Answer:
0.998272 (0.998 in 3sf)
Step-by-step explanation:
Probability(detects) = 0.88
Probability(doesn't detect) = 1 - 0.88 = 0.12
Total probability is always 1
Probability of atleast one detecting = 1 - probability(all not detecting)
= 1 - (0.12×0.12×0.12)
= 1 - 0.001728
= 0.998272
