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erastova [34]
2 years ago
8

HELP EMERGENCY!!!! (2.5 x 10-10) (7 x 10-5) Express your answer in scientific notation.

Mathematics
1 answer:
dangina [55]2 years ago
8 0

Answer:

1.75 × 10^{-15}  

I hope this helps!

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What is the solution of the system?
spin [16.1K]
The Answer is b: x = 18, y = -20

Proof:

Solve the following system:
{4 x + 3 y = 12 | (equation 1)
{7 x + 5 y = 26 | (equation 2)

Swap equation 1 with equation 2:
{7 x + 5 y = 26 | (equation 1)
{4 x + 3 y = 12 | (equation 2)

Subtract 4/7 × (equation 1) from equation 2:
{7 x + 5 y = 26 | (equation 1)
{0 x+y/7 = (-20)/7 | (equation 2)

Multiply equation 2 by 7:
{7 x + 5 y = 26 | (equation 1)
{0 x+y = -20 | (equation 2)

Subtract 5 × (equation 2) from equation 1:
{7 x+0 y = 126 | (equation 1)
{0 x+y = -20 | (equation 2)

Divide equation 1 by 7:
{x+0 y = 18 | (equation 1)
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Collect results:

Answer: {x = 18, y = -20
6 0
3 years ago
Y multiplied by 2 1/2
enot [183]

Answer:

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Step-by-step explanation:

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