2 years ago

Given the following parallelogram: Solve for x. 7x + 70 16x - 20

Mathematics

1 answer:

kirill115 [55]2 years ago

8 0

Answer:

x=10

Step-by-step explanation:

7x+70=16x-20

70=9x-20

9x=90

x=10

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Answer:

Step-by-step explanation:

2n + 1.6 = 17.6 what is the value of n?

2n + 1.6 = 17.6

2n = 17.6 - 1.6

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n = 8

-----------------

check

2n + 1.6 = 17.6

2*8+1.6=17.6

16+1.6=17.6

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How much of an alloy with 30% copper must be added to 25 pounds of a second alloy that is 20% copper to create a 27% alloy? 33.8

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58.33 lbs.

Step-by-step explanation:

There are already 25 lbs of alloy of copper

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Now available is

Copper Other metals

5 lbs 20 lbs

Let x lb of 30% copper is added.

Then new alloy will have 5+0.3x lb copper in total of 25+x lbs

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