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3 years ago

Solve the system of linear equations using elimination. −9x − 10y = 17 −10x − 10y = 10

Mathematics

1 answer:

pav-90 [236]3 years ago

4 0

Answer:

you are to subtract the equation

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Sara has lived 18.0 years. How many seconds has she lived? Express the answer in scientific notation. Use 365.24 days per year f

Contact [7]

Answer:

She has lived $5.68021248\times 10^8\ \text{seconds}$ .

Step-by-step explanation:

Given : Sara has lived 18.0 years.

To find : How many seconds has she lived?

Solution :

Using conversions,

1 year = 365.24 days

1 day = 24 hours

1 hour = 60 minutes

1 minute = 60 seconds

Converting 18 years into seconds,

$18 \text{years} = 18\times 365.24\times 24\times 60\times 60\ \text{seconds}$

$18 \text{years} =568021248\ \text{seconds}$

In scientific notation,

$18 \text{years} =5.68021248\times 10^8\ \text{seconds}$

Therefore, she has lived $5.68021248\times 10^8\ \text{seconds}$ .

4 0

3 years ago

What’s the answer to this questions ?

DochEvi [55]

Answer:

60 degress

Step-by-step explanation:

180-80=120

120/2=60

6 0

3 years ago

Solve by using a matrix.

xenn [34]

The answer is d. q=10 d=28 n=14

7 0

3 years ago

Read 2 more answers

With regard to mathematics, what is in excepted statement of fact that is used to prove other statements

ehidna [41]

Answer:

Axiom

Step-by-step explanation:

This is called a axiom. Not too sure if you mean the the definition but this is the definition. Hope this helped c:

5 0

3 years ago

Which expression is equivalent to the following complex fraction?

True [87]

Answer:

Step-by-step explanation:

Given the complex fraction;

$-\frac{2}{x} +\frac{5}{y} / \frac{3}{y} - \frac{2}{x} \\$

First we will find the LCM of the numerator and the denominator as shown below;

$\frac{-2y+5x}{xy} /\frac{3x-2y}{xy}$

Then we divide both equation by multiplying the numerator by the reciprocal of the denominator as shown;

$= \frac{-2y+5x}{xy} * \frac{xy}{3x-2y} \\= \frac{-2y+5x}{3x-2y} \\$

This gives the required answer

5 0

3 years ago