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3 years ago

What is x? 5|9 − 5k| − 7 = 38

Mathematics

1 answer:

ahrayia [7]3 years ago

3 0

Answer:

k =0 , k =18/5

Step-by-step explanation:

5|9 − 5k| − 7 = 38

Add 7 to each side

5|9 − 5k| − 7+7 = 38+7

5|9 − 5k| = 45

Divide each side by 5

5|9 − 5k| /5 = 45/5

|9 − 5k| = 9

We isolated the absolute value so now we split the equation into 2 parts, a positive and a negative

9-5k =9 9-5k = -9

Subtract 9 from each side

9-9-5k =9-9 9-9-5k = -9-9

-5k =0 -5k = -18

Divide each side by -5

-5k/-5 = 0/-5 -5k/-5 = -18/-5

k =0 k =18/5

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2 years ago

As low tide came in, the ocean dropped by a rate of 12 inches every 3 minutes. Write a rational # describing this rate.

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3 years ago

You just paid $435,000 for a policy that will pay you and your heirs $17,300 per year forever with the first payment in one year

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2 years ago

2. About 40 millions of aluminum cans can be recycled each month in the US. A quarter of these aluminum cans are used to make on

geniusboy [140]

Answer:

Step-by-step explanation:

About 40 millions of aluminum cans can be recycled each month in the US. A quarter of these aluminum cans are used to make one aluminum boat. How many aluminum boats can be made in one year in the US?

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Approximate Number of cans that can be recycled per month in the US = 40 million

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The number of aluminum boats that can be made in the US in one year :

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2 years ago

Pawl,colin and bria are waiters. One night the restaurant earns tips totalling £78.40 the share the tips in the ratio 2.1.5 how

stellarik [79]

Answer: Brian gets $39.2 more over Colin.

Step-by-step explanation:

Given: Total tip amount = £78.40

The ratio of the share of tips for Pawl, Colin and Bria is 2:1 :5.

Let tip amount for Pawl = 2x, tip amount for Colin = x , tip amount for Bria = 5x

Then, 2x+x+5x= 78.40

$\Rightarrow\ 8x = 78.40\\\\\Rightarrow x=\dfrac{78.40}{8 }\\\\\Rightarrow x=9.8$

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Difference = $(49-9.8) = $ 39.2

Hence, Brian gets $39.2 more over Colin.

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3 years ago