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3 years ago

What is the word form for the number 37,917,545??? i am in elementry

Mathematics

2 answers:

iren [92.7K]3 years ago

7 0

Thirty-seven million nine hundred-seventeen thousand five hunderd forty five

Katena32 [7]3 years ago

5 0

Answer:

Thirty seven million, nine hundred seventeen thousand, five hundred forty five

Step-by-step explanation:

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14 and -18 would be less than or equal too when the -y makes them -14 and 18 it is still less than 19

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What is a-5/6= -3 2/3 + 5/6

valentinak56 [21]

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A=-2

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3 years ago

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"Bert has half as much money as Ernie. If Ernie loses $225 and Bert earns $675, Bert will have twice as much money as Ernie. How

Rzqust [24]

Answer: Ernie has $750 and Bert has $\dfrac{750}{2}=\$375$

Step-by-step explanation:

Let the amount that Ernie has be 'x'.

Let the amount that Bert has be $\dfrac{x}{2}$

Amount lost by Ernie = $225

Amount gained by Bert = $675

According to question, we get that

$2(x-225)=\dfrac{x}{2}+675\\\\2x-450=\dfrac{x}{2}+675\\\\2x-\dfrac{x}{2}=675+450\\\\\dfrac{4x-x}{2}=1125\\\\\dfrac{3x}{2}=1125\\\\x=\dfrac{1125\times 2}{3}\\\\x=\$750$

Hence, Ernie has $750 and Bert has $\dfrac{750}{2}=\$375$

3 0

2 years ago

Is my answer correct?

Black_prince [1.1K]

No, we do not multiply the first equation by 2 and then add it to the second equation. We have to multiply the first equation by 4.

To illustrate this point, consider system A:

$\left\{ \begin{aligned}x - y &= 3 \\-2x + 4y &= -2\end{aligned}\right.$

If we multiply the first equation by 2, we get

$2x - 2y = 6$

Now, if we replace the second equation with the sum of the second equation and $2x - 2y = 6$ , we get

$\left\{ \begin{aligned}x - y &= 3 \\(-2x+2x) + (4y - 2y) &= -2 + 6\end{aligned}\right.$

which simplifies to

$\left\{ \begin{aligned}x - y &= 3 \\2y &= 4\end{aligned}\right.$

This is not an equivalent system to System B. We can see that we ended up with a 2y = 4 equation.

In order to end up with a 2x = 10 second equation, we have to multiply the first equation of system A by 4 to get

$4x - 4y = 12$

If we replace the second equation with the sum of the second equation and $4x - 4y = 12$ , we get

$\left\{ \begin{aligned}x - y &= 3 \\(-2x+4x) + (4y-4y) &= -2 + 12\end{aligned}\right.$

which simplifies to

$\left\{ \begin{aligned}x - y &= 3 \\2x &= 10\end{aligned}\right.$

Otherwise, you are correct. The solution to system B is the solution to system A. Adding an equation to another does not change the system.

4 0

3 years ago