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Assoli18 [71]
2 years ago
5

This is from Khan academy I have to attach a PNG if you can help me solve it! Thank you!

Mathematics
1 answer:
Elenna [48]2 years ago
7 0

Step-by-step explanation:

\frac{5 {}^{  - 4x + 7} }{125 {}^{x} }

\frac{5 {}^{ - 4x + 7} }{5 {}^{3x} }

5 {}^{ - 4x + 7 - 3x}

5 {}^{ - 7x + 7}

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USE DISTANECE= RATE * TIME
torisob [31]
A]
D=R×t
d=5.8r
d2=5.1(r+7)
0.7r=35.7
r=51 mi/hr
thus the average speed on the outbound trip would be:
51+7=58 mi/hr

b]
let speed of fishing boat=x km/h
speed of cruise ship=(x+12.5) km/h
distance traveled by fishing boat=11.5×x=11.5x km
distance traveled by cruise ship=(x+12.5)×11=(11x+137.5) km
Total distance covered by the ships:
11.5x+11x+137.5=322
22.5x=322-137.5
22.5x=184.5
thus
x=184.5/22.5
x=8.2 km/h
The speed of fishing boat is 8.2 km/hr





4 0
3 years ago
Read 2 more answers
Nine more than half of a number is 21
pogonyaev
I assume you're looking for the number:
0.5n + 9 = 21
- 9
0.5n = 12
÷ 0.5
n = 24
So the beginning number is 24, hope this helps!
3 0
3 years ago
Could I have gotten this right or is this wrong
insens350 [35]
You are very correct
5 0
3 years ago
I really need help with this question I’m taking a test it’s urgent !!
dimaraw [331]

Answer:

EF = 10

Step-by-step explanation:

QUICK

9/15 = 6/x

x=10

8 0
2 years ago
Solve for x.<br><br> 2/3x=−3/5<br><br><br> x=−9/10<br><br> x=−3/5<br><br> x=−2/5<br><br> x=1 1/5
RSB [31]

Answer:

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
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