2 years ago

Can someone help me with this ASAP please I’m being timed !

Mathematics

1 answer:

Paladinen [302]2 years ago

8 0

Answer:

Step-by-step explanation:

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Anastasy [175]

Step-by-step explanation:

$\begin{aligned}\rm f(x)&=\rm\frac{1}{2}\times 2^x\\\rm f(7)&=2^{-1}\times 2^7\\&=2^{-1+7}\\&=2^{7-1}\\&=2^6\\&=2^6\\&=\bf 64\end{aligned}$

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2 years ago

The distance, d, in kilometres, travelled by a plane after t hours can be represented by d(t)=-4t³=40t²+500t, where t is greater

Ede4ka [16]

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4t^3 - 40t^2 - 500t + 4088 = 0
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Therefore, the plane has flown 4088 km 7 hours after it took off.

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3 years ago

Alexandra and Austin applied to the same university. They looked up the average SAT score of students admitted to that universit

Deffense [45]

Answer:

x= (y+40)-(y-330)

Step-by-step explanation:

According to the information provided, the difference in their scores would be the result of subtracting Austin's SAT score from Alexandra's SAT score.

Then, as Alexandra's SAT score was 40 points above the average score this means that you have to add 40 to the average score to get her result. Also, as Austin's SAT score was 330 points below the average score, this means that you have to subtract 330 from the average score. With this you can write the expression:

x= difference in their scores

y= average score

x= (y+40)-(y-330)

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