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3 years ago

(2.3 x 10 to the power of 4) times ( 1.5x10 to the power of minus 3) in standard form

Mathematics

1 answer:

Eduardwww [97]3 years ago

6 0

Answer:

$3.45\times10$

Step-by-step explanation:

$(2.3 \times 10^{4}) \times ( 1.5 \times10^{-3} )= 2.3\times1.5\times10^{4}\times10^{-3}$

$= 3.45\times 10^{((4)+(-3))}$

$=3.45\times10$

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3 years ago

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:
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{0 x+y = -20 | (equation 2)

Collect results:

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3 years ago

Jackie has 1 6/12 pitchers of fruit juice. She and her friend drink 4/12 of a pitcher. How much fruit does Jackie have left?

goldfiish [28.3K]

Answer:

$1\frac{1}{6}\ pitchers\ of\ fruit\ juice$

Step-by-step explanation:

we know that

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Convert mixed number to an improper fraction first

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convert to mixed number

$\frac{14}{12}=\frac{12}{12}+\frac{2}{12}=1\frac{1}{6}\ pitchers\ of\ fruit\ juice$

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3 years ago

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4 years ago

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