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densk [106]
3 years ago
7

Which expression is equivalent to 8(k + m) - 15(2k + 5m)? agul

Mathematics
1 answer:
SpyIntel [72]3 years ago
4 0

Answer:

-22k - 67m

Step-by-step explanation:

You have to use the Distributive property:

8(k + m) - 15 (2k + 5m)

8k + 8m - 30k - 75m

Now simplify:

8k - 30k + 8m - 75m

-22k - 67m

Be careful with positives and negatives!

Hope this help!

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A car produces 53.9 tons of carbon dioxide over a 7 year period. Find its carbon footprint (tons of carbon dioxide per year).
Marina86 [1]

Answer:

carbon footprint

  7.7 tons

Step-by-step explanation:

Given that,

carbon dioxide produced by a car over 7 year period = 53.5 tons

To find,

carbon footprint <em>(tons of carbon dioxide per year)</em>

7 years ------> 53.5 tons

1 year   -------> 53.9/7 tons

= 7.7 tons

tons of carbon dioxide produced per year = 7.7

8 0
4 years ago
If a,b,c are all non-zero numbers and a+b+c=0, prove that
Butoxors [25]

<em>Given - a+b+c = 0</em>

<em>To prove that- </em>

<em>a²/bc + b²/ac + c²/ab = 3</em>

<em>Now we know that</em>

<em>when x+y+z = 0,</em>

<em>then x³+y³+z³ = 3xyz</em>

<em>that means</em>

<em> (x³+y³+z³)/xyz = 3 ---- eq 1)</em>

<em>Lets solve for LHS</em>

<em>LHS = a²/bc + b²/ac + c²/ab</em>

<em>we can write it as LHS = a³/abc + b³/abc + c</em><em>³</em><em>/abc</em>

<em>by multiplying missing denominators,</em>

<em>now take common abc from denominator and you'll get,</em>

<em>LHS = (a³+b³+c³)/abc --- eq (2)</em>

<em>Comparing one and two we can say that</em>

<em>(a³+b³+c³)/abc = 3</em>

<em>Hence proved,</em>

<em>a²/bc + b²/ac + c²/ab = 3</em>

6 0
3 years ago
Write 11/75 as a decimal
Maru [420]

Answer:

0.147

Step-by-step explanation:

This is rounded to the nearest thousandths place. 11 divided by 75 is 0.147.

3 0
3 years ago
Read 2 more answers
A car rents for ​$35 per day plus 18cents¢ per mile. you are on a daily budget of ​$71. what mileage will allow you to stay with
Butoxors [25]
200 miles
$71-$35=$36 left in budget
$36/.18 per mile= 200 miles
6 0
3 years ago
I know the answer is not 6 so does anyone know the answer?<br> * ANSWER ASAP *
aleksklad [387]

Answer:

8

Step-by-step explanation:

Using sine rule,

sin 80° ÷ 10 = sin 50° ÷ x

x = sin 50° ÷ (sin 80° ÷ 10)

= 7.77 --> 8

4 0
3 years ago
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