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3 years ago

Can you please help me with this question (image)

Mathematics

1 answer:

rewona [7]3 years ago

6 0

A person's heart beats approximately 10⁵ times a day.

10⁵ in figures is 100000 beats each day.

A person lives for approximately 81 years.

So, now take your answer from before and multiply it by 81: 100000 × 81 = 8100000.

To change your answer to standard form, you make it into a decimal which is not greater than 9, so, 8.1 × 10⁶

And that is your answer: 8.1 × 10⁶.

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Solve kx+12=3kx for x

PilotLPTM [1.2K]

Answer:

$x=6/k$

Step-by-step explanation:

we have

$kx+12=3kx$

Solve for x

That means----> isolate the variable x

Subtract $kx$ both sides

$kx+12-kx=3kx-kx$

$12=2kx$

Divide by $2k$ both sides

$12/2k=2kx/2k$

$6/k=x$

Rewrite

$x=6/k$

3 0

4 years ago

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IrinaVladis [17]

Answer:

Because in the previous step we proved that two triangles were congruent, the answer is CPCTC.

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4 years ago

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A store sells T-shirts for $10 each and jeans for $20 a pair. Anna spends $150 on T-shirts and jeans. She buys x T-shirts and y

tatyana61 [14]

$20*5=$100 (for the jeans)
$10*5=$50 (for the t-shirts)
$100+50=$150
Anna was able to buy 5 pairs of jeans and 5 T-shirts, for $150.

7 0

3 years ago

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Round 7.38 to the nearest tenth

Anna71 [15]

Answer:

7.40

Step-by-step explanation:

7.38, we go to the tenths place and the number after then tenths place five or more u raise the score since its more u change hte score of the 3 to 4 and put a zero in the hundredths place

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3 years ago

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Can a theorem contain definitions? Please help!

jekas [21]

yes because a theorem is an idea which occurs to be true in all cases. it is not a theory. definitions help with the understanding of theorems

hope this helps.

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3 years ago