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3 years ago

8

Jen and Kamlee are walking to school. After 20 minutes jen has walked 4/5 mile. After 25 minutes Kamlee has walked 5/6 mile. FIN

D THEIR SPEEDS IN MPH

1 answer:

Amanda [17]3 years ago

6 0

Answer:

im gonna guess 20 because 5x4=20

Step-by-step explanation:

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Please answer ASAP! An explanation is a MUST REQUIREMENT in order to receive points and the Brainliest answer. Thank you.

solmaris [256]

I think the fourth answer is correct because instead of subtracting 0.25 from c, you could do the opposite, wich is 0.75 x c.

5 0

3 years ago

Which one is the greater quantity 1/3 of a box of corn crinkles or 50% of a box of corn krinkles

DerKrebs [107]

1/3=0.3333333333333
50%=0.50

0.50>0.33333333333333
50%>1/3

50% is biger

3 0

3 years ago

Read 2 more answers

Increase 400 by 1%<br> yes I need help please

Dima020 [189]

Answer:

404

Step-by-step explanation:

1% of 400 is 4

5 0

3 years ago

Which graph matches the exponential function f(x) = 2(1.5)x?

Rama09 [41]

The third one pls mark me brainliest

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4 years ago

Write an exponential model given the points ( 7, 12 ) and ( 8, 25 ). Round to the nearest hundredth.

inna [77]

Answer:

The exponential model is $y = 0.07\cdot e^{0.73\cdot x}$ .

Step-by-step explanation:

The exponential model can be modelled by the following mathematical expression:

$y = A\cdot e^{B\cdot x}$ (1)

Where:

$x$ - Independent variable.

$y$ - Dependent variable.

$A, B$ - Coefficients.

If we know that $(x_{1}, y_{1}) = (7,12)$ and $(x_{2}, y_{2}) = (8,25)$ , then we get the following system of equations:

$A\cdot e^{7\cdot B} = 12$ (2)

$A\cdot e^{8\cdot B} = 25$ (3)

If we divide (3) by (2), we calculate the value of $B$ :

$e^{B}=\frac{25}{12}$

$B = \ln \frac{25}{12}$

$B \approx 0.734$

And by (2), we determine the value of $A$ :

$A = 12\cdot e^{-7\cdot B}$

$A = 0.0704$

The exponential model is $y = 0.07\cdot e^{0.73\cdot x}$ .

4 0

3 years ago