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Evgen [1.6K]
3 years ago
8

Kelly and Max run a race. Max takes 42 seconds to run the race. She is 7 seconds faster then Kelly. How many seconds does Kelly

take? please show the work if possible
Mathematics
2 answers:
Margaret [11]3 years ago
7 0

Answer

49 seconds for Kelly

Step-by-step explanation:

Max ran 42 and he was FASTER by 7 seconds which means Kelly will have a greater number so you will then add the missing seven seconds to Kelly's time which equals 49

yan [13]3 years ago
4 0

Answer:

35 seconds

Step-by-step explanation:

if you simply minus 7 seconds from max 42 second time you get 35 seconds.

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At noon Joyce drove to the lake at 30 miles per hour. but she made the long walk back home at 4 miles per hour. How long did she
mars1129 [50]

Answer:

60 miles

Step-by-step explanation:

let d = distance to the lake

Using:  time = distance ÷ speed

Create expressions for the time it takes for each journey:

Drive:  t_1=\dfrac{d}{30}

Walk:   t_2=\dfrac{d}{4}

If total time = 17 hours

\implies t_1+t_2=17

\implies \dfrac{d}{30}+\dfrac{d}{4}=17

\implies \dfrac{17d}{60}=17

\implies 17d=1020

\implies d=\dfrac{1020}{17}

\implies d=60

Therefore she walked 60 miles

3 0
2 years ago
Read 2 more answers
What is “2 1/2 x 3 1/3”
lesya692 [45]

Answer:

The answer is 8.3 bar notation.

Step-by-step explanation:

2 1/2 into improper is 5/2

3 1/3 into improper is 10/3

Now Multiply

5/2 x 10/3 is 300/36

Now Reduce.

25/3 = 8.3 bar notation

Mark Brainliest!

3 0
2 years ago
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Find the inverse of each function. Is the inverse a function? f(x)=x⁷
Luda [366]

The inverse of the function x^7 is x^-7 and it is also a function.

An inverse function or an anti function is defined as a function, which can reverse into another function.

A standard method to find inverse of a function is to set y=f(x)

let y= f(x)=x^7

thus

\sqrt[7]{y}=x

thus f^{-1}(y)=\sqrt[7]{y}

thus f^{-1} (x)=\sqrt[7]{x}

(To verify this if a function is inverse or not we are required to check for the identity)

f(f^{-1}(x))=f^{-1}(f(x))=x

Therefore, The inverse of the function x^7 is x^-7 and it is also a function.

For further reference:

brainly.com/question/2541698?referrer=searchResults

#SPJ4

3 0
1 year ago
Given that f(1)=2 and f'(1)=4, find the derivative of f(x)loge(x) when x=1
inessss [21]

Answer:

2

Step-by-step explanation:

loge(x) is ln(x)

f(x) × ln(x)

Differentiate using product law

[ln(x) × f'(x)] + [(1/x) × f(x)]

x = 1

[ln(1) × f'(1)] + [(1/1) × f(1)]

(0 × 4) + (1 × 2)

0 + 2

2

3 0
3 years ago
Note: Enter your answer and show all the steps that you use to solve this problem in the space provided.
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The side x is equal to 12
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