Answer:
n = 5
Step-by-step explanation:
1) Use power rule: 
.
2) Cancel the base of z on both sides.
2n = 10
3) Divide both sides by 2.
4) Simplify 
to 5.
n = 5
If the current in a stream moves at a rate of 7 mph. If a boat travels 98 miles downstream in the same time that it takes to travel 49 miles upstream then the speed of the boat in still water is 21 miles per hour.
<h3>What is speed?</h3>
Speed is the distance covered by an object in a certain time period. It is also known as velocity. The formula of speed is as follows:
Speed=Distance/ Time.
<h3>How to calculate speed?</h3>
We have been given that the speed of stream is 7miles per hour.
Let v be the speed of the boat, and t the time to travel
98=t*(7+v) (1)
49=t(v-7) (2)
(1)+(2) => 2tv=147
7t+(49+7t)=98
14t+49=98
14t=49
t=49/14
t=7/2
Put the value of t in equation 1 to get the value of v:
98=t(7+v)
98=7/2(7+v)
196/7=7+v
28=7+v
v=28-7
v=21
Hence if the current in a stream moves at a rate of 7 mph. If a boat travels 98 miles downstream in the same time that it takes to travel 49 miles upstream then the speed of the boat in still water is 21 miles per hour.
Learn more about speed at brainly.com/question/4931057
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173
2√346
<u> -2 </u>
14
<u> -14 </u>
06
<u> -6</u>
0
The answer is 173 (tried my best to show my work)
Answer:
-0.4-4y
Step-by-step explanation:
-0.5(0.8+8y)
Distribute -0.5 into the parentheses
= -0.5×0.8+(-0.5)×8y
= -0.4+(-4y)
A negative and a positive make a negative
= -0.4-4y
I hope this helps!
Answer:
10
Step-by-step explanation:
PEMDAS
Parenthesis
Exponent
Multiply
Divide
Add
Subtract
5+4*4/2-3
5+4=9
9*4/2-3
Multiply and divide from left to right.
9*4=36
36/2-3
36/2=13
13-3=10
10 is the correct answers.
