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3 years ago

A system of equations is shown:

Mathematics

1 answer:

Andreas93 [3]3 years ago

8 0

Answer:

c = 793/28 , d = -358/7

Step-by-step explanation:

Solve the following system:

{4 c + 2 d = 11 | (equation 1)

(7 d)/2 = -179 | (equation 2)

Multiply equation 2 by 2:

{4 c + 2 d = 11 | (equation 1)

0 c+7 d = -358 | (equation 2)

Divide equation 2 by 7:

{4 c + 2 d = 11 | (equation 1)

0 c+d = -358/7 | (equation 2)

Subtract 2 × (equation 2) from equation 1:

{4 c+0 d = 793/7 | (equation 1)

0 c+d = -358/7 | (equation 2)

Divide equation 1 by 4:

{c+0 d = 793/28 | (equation 1)

0 c+d = -358/7 | (equation 2)

Collect results:

Answer: {c = 793/28 , d = -358/7

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4 years ago

Complete the solution of the equation. Find the value of y when x equals 15.

GuDViN [60]

So first, we want to substitute in 15 to all the x variables.

So,

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Or,

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3 years ago

Read 2 more answers

Please help me round to nearest hundredth

Masteriza [31]

Answer:

(a) 2.27 lb/$

(b) 0.10 mi/min

Step-by-step explanation:

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(25 lb)/($11.00) ≈ 2.272727... lb/dollar

The digit in the thousandths place is less than 5, so that digit and all digits to its right are dropped when rounding to hundredths.

2.27 pounds per dollar

Speed in miles per minute is found by dividing miles by minutes:

(6 mi)/(58 min) ≈ 0.103448... mi/min

Rounding to hundredths is done the same way as above.

0.10 miles per minute

_____

If the digit to the right of the place you're rounding to is 5 or more, then 1 is added in the place you're rounding to when digits to its right are dropped.

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3 years ago

Which number line represents the solution set for the inequality 3(8 – 4x) < 6(x – 5)?

Ganezh [65]

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54/18 < x

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hope this will help you

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3 years ago

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