Person a can walk 5 miles in an hour.
Person b can walk 3 miles in an hour.
They are 12 miles apart, and after an hour they have covered 8 miles.
8:1 = 12:x
8x = 12
x = 1.5
After an hour and a half, they will meet.
Check:
5 miles : 1 hour = 7.5 miles : 1.5 hours
3 miles : 1 hour = 4.5 miles : 1.5 hours
Together, they should have covered 12 miles.
7.5 + 4.5 = 12
It takes 1.5 hours to meet eachother.
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4 people email 3 more people each so 12 people are emailed, then these 12 people email 3 more people each, so 36 people are emailed.
Answer:
Step-by-step eWrite 2.9 as
2.9
1
Multiply both numerator and denominator by 10 for every number after the decimal point
2.9 × 10
1 × 10
=
29
10
Reducing the fraction gives
29
10xplanation:
Answer:
f(x + 1) = 3x² + 5x + 7
Step-by-step explanation:
To find f(x + 1), substitute x = x + 1 into f(x), that is
f(x + 1) = 3(x + 1)² - (x + 1) + 5 ← expand (x + 1)² using FOIL
= 3(x² + 2x + 1) - x - 1 + 5 ← distribute parenthesis by 3
= 3x² + 6x + 3 - x - 1 + 5 ← collect like terms
= 3x² + 5x + 7
Answer:
I got $7.75.
Step-by-step explanation:
66.85-4.85=62
62/8=7.75.
