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2 years ago

STOP WHATEVER UR DOING AND PLEASE HELP ME

Mathematics

2 answers:

almond37 [142]2 years ago

8 0

Answer:

Sarah is faster.

Step-by-step explanation:

Timmy travels 70 in 1 second.

Sarah travels 75 in 1 second.

alisha [4.7K]2 years ago

7 0

Answer: Sarah.
d=rt
Miles = (miles/hour)(hour)

So Timmy is driving 70mph

Sarah:
75 = r (1), r = 75mph
150 = r(2), r = 75mph

Let me know if you have questions

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The diagram shows a rectangle and a square.

Alex777 [14]

Answer:

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Step-by-step explanation:

The side of the square will be the average of the two sides of the rectangle with the same perimeter.

Formulas for the perimeters are ...

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Equating these gives ...

4s = 2(L+W)

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For the given side lengths, ...

s = (2 cm +6 cm)/2 = (8/2) cm = 4 cm

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Step-by-step explanation:

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3 years ago

Help! Exponential Equation WITHOUT CALCULATOR

ale4655 [162]

$
1.
(2^{x} -2^{-x})^{2} = 4^{2} \\ \\2^{2x}-2*2^{x}*2^{-x} + 2^{-2x} =4^{2} \\ \\2^{2x}-2*2^{x-x} + 2^{-2x} =4^{2} \\ \\ 2^{2x}+ 2^{-2x} - 2=16 \\ \\ 2^{2x}+ 2^{-2x} = 18

\\ \\ 2.( 2^{x})^{3} - (2^{-x}^) ^{3}= (2^{x} -2^{-x})(2^{2x}+2^{x}*2^{-x}+2^{-2x})
\\ \\ ( 2^{x})^{3} - (2^{-x}^)^{3}=(2^{x} -2^{-x})(2^{2x}+2^{-2x}+2^{x}*2^{-x})
\\ \\ ( 2^{x})^{3} - (2^{-x}^)^{3}=(2^{x} -2^{-x})(2^{2x}+2^{-2x}+1)
\\ \\ ( 2^{x})^{3} - (2^{-x}^)^{3}=(2^{x} -2^{-x})((2^{2x}+2^{-2x})+1)
$

$\\ \\ ( 2^{x})^{3} - (2^{-x})^{3} =(4)((18)+1)= 76
\\ \\ 2^{3x}-2^{-3x} =76
$

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3 years ago