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ASHA 777 [7]
3 years ago
12

On Thursday, Emily cycled 88 kilometers in 4 hours. On Friday, she cycled at an average of 3 kph faster. What was her average ra

te on Friday?
A. 7 kph
B. 25 kph
C. 30 kph
D. 66 kph
Mathematics
1 answer:
Lunna [17]3 years ago
7 0
On Thursday she cycled 88 km per hr...for 4 hrs
88/4 = 22 km per hr

On Friday, she cycled 3 km per hr faster
22 + 3 = 25 km per hr <==
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Jason mixed 8 ml of a salt solution with 11ml of a 47% salt solution,to make a 43% salt solution. Find the percent salt concentr
pantera1 [17]

Let x% be the salt concentration of first solution.

Then in 8ml, amount of salt =  \frac{8x}{100}

Given that to this 8ml solution, 11ml solution of a 47% salt solution is mixed.

amount of salt in 11ml of 47% salt solution is  =  \frac{11*47}{100} = \frac{517}{100}

So, total amount of salt in new mixture =  \frac{8x}{100} +\frac{517}{100} =\frac{8x+517}{100}

But given that this new solution is a 43% salt solution.

Hence amount of salt in new mixture of (8+11)=19ml solution of 43% salt solution is \frac{19*43}{100} = \frac{817}{100}

Hence  \frac{8x+517}{100} = \frac{817}{100}

            8x+517 = 817

             8x=817-517 = 300

             x= 300/8 = 37.5

Hence the salt concentration in the first solution is 37.5%

8 0
3 years ago
I spin a spinner that's 1-6. What is the possibility of getting an odd number on the first spin and an even number on the second
Nastasia [14]
The probability of getting a 4 is 1/6 and the probability of getting an even number is 3/6. So u multiply your two fractions so the answer is 3/36 which simplifies to 1/12. The
5 0
3 years ago
Simplify -8/2 divided by 6/-3
Alika [10]
<span><span>The answer would be 2
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</span></span><span>=<span>-8 × -3/2 × 6
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</span></span><span>=<span>24 ÷ 12/12 ÷ 12
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3 years ago
A model rocket is 3 inches long. The real rocket is 120 feet long.
Nana76 [90]

The units are the complete story on this question. All of the choices are over 1 so the units make the answer over one. It takes more feet than it does inches to make the scale. The correct units are 120 feet / 3 inches. That makes A and B both incorrect.

You can't get 360 by any method but multiplication. The units for multiplication would be ft*in. So D is wrong. That only leaves you with C which is the answer.


5 0
3 years ago
What is the answer pls for this is hard
yanalaym [24]

Answer:

125.6 units = x

Step-by-step explanation:

72

---- = tan 37 degrees, so x = 72/(tan 37 degrees)

 x

This comes out to x = 72/0.573 = 125.6 units = x

6 0
2 years ago
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