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topjm [15]
3 years ago
11

Simplify the following expression (3x-5)(4-9x)+(2x+1)(6x^2+5)

Mathematics
1 answer:
timama [110]3 years ago
6 0
Expand out the brackets and simplify, largest indices first.
12x³-21x²+67x+30
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A pole that is 3.2m tall casts a shadow that is 1.54m long. At the same time, a nearby building casts a shadow that is 50.75m lo
Nastasia [14]
3.2m casts 1.54m shadow.

3.2÷1.54= 160/77 (2.077922077922...)

50.75 × 160/77= 105.454545...

105m to the nearest meter.
6 0
3 years ago
A watch is sold for $130 at a loss of $30. what was the original cost of the watch​
posledela

Answer:

130.00 + 30.00 = $160.00

Step-by-step explanation:

5 0
3 years ago
write the possible range of the measurement 214 ounces +1.2% round to the nearest hundredth if necessary
boyakko [2]

9514 1404 393

Answer:

  [211.43,216.57]

Step-by-step explanation:

1.2% of 214 is ...

 0.012 × 214 = 2.568 ≈ 2.57 . . . . rounded to hundredths

Then the minimum possible value is ...

  214 -2.57 = 211.43

and the maximum possible value is ...

  214 +2.57 = 216.57

The range is 211.43 to 216.57.

3 0
3 years ago
Answer this urgently, please!!!!
Inessa05 [86]

Answer:

exact form: 55/256

decimal form: 0.21484375

4 0
2 years ago
What is the value of 9(n+2)−5n for n=14?<br> 3<br> 9<br> 10<br> 19
Murrr4er [49]
If you want to know the value of a  function, you need to substitute the variable (here n) for the value:

so in the function

9(n+2)−5n

we substitute n with 14:

<span>9(14+2)−5*14

first calculate the inside of the bracket:

</span>
<span>9*16−5*14

9 times 16 is 144

144-5*14

5*14 is 70, so we have

144-70=74

so the answer should actually be 74!

Perhaps you mistyped the questions? can you check it again, please?

</span>
5 0
3 years ago
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