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VLD [36.1K]
4 years ago
15

For a homework question, Linda is asked to rewrite the expression (x3⋅x)2 ( x 3 ⋅ x ) 2 in the form xk. x k . Linda claims that

the value of k k is 9 9 since (3⋅1)2=32=9. ( 3 ⋅ 1 ) 2 = 3 2 = 9 . Decide if Linda is correct. If Linda is correct, enter 9 below. If Linda is not correct, enter the correct value of k. k .
Mathematics
1 answer:
andre [41]4 years ago
8 0

Answer:

k=8

Step-by-step explanation:

Question says that given expression is \left(x^3\cdot x\right)^2

Now we need to rewrite that expression in form of x^k.

To do that we need to simplify given problem \left(x^3\cdot x\right)^2.

x is same as x^1

=\left(x^3\cdot x^1\right)^2

we can begin with inner parenthesis

=\left(x^{3+1}\right)^2

=\left(x^{4}\right)^2

=x^{4*2}

=x^8

Now compare that with =x^k, we get:

k=8

Which is different value that Linda got.

Hence answer of the Linda is wrong.

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andrey2020 [161]

Answer:

<em>They will catch up at 2.5 hours</em>

Step-by-step explanation:

Constant Speed Motion

It refers to situations where objects move at the same speed in the same direction. The speed is computed as the ratio of the distance x to the time

\displaystyle v=\frac{x}{t}

The situation pictured in the question requires the computation of distances traveled by two objects running at different speeds. The slower car goes ahead with a 35-mile head start, so it's just a matter of time when the fastest car and the slower will catch up. We'll use here the concept of relative speed to easily solve the problem.

The speed of the first friend is

v_1=51\ mph

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v_2=65\ mph

If the first friend was at rest, the second friend will have a relative speed of

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The distance between them (35 miles) will be covered in a time t which can be found from

\displaystyle v_r=\frac{x}{t}

\displaystyle t=\frac{x}{v_r}

\displaystyle t=\frac{35}{14}=2.5\ hours

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We can see they catch up (200-162.5=37.6 miles) before arriving to their destiny.

Just to verify, the distance traveled by the first friend is

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Find the GCF of 14 and 15. GCF=
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Answer:

1

Step-by-step explanation:

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15 - 3 x 5

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Step-by-step explanation:

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