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3 years ago

Which expressions are equivalent to 35 + 30s - 45t?

Mathematics

2 answers:

romanna [79]3 years ago

5 0

Answer:

the answers are B and C your welcome

Step-by-step explanation:

stiv31 [10]3 years ago

3 0

We have that
35 + 30s - 45t

case A)
7⋅(5+30s−45t)---> 35+210s-315t-----> is not equivalent

case B)
5(7+6s−9t)----> 35+30s-45t------> is equivalent to 35 + 30s - 45t

case C)
(−35−30s+45t)×(−1)----> 35+30s-45t---> is equivalent to 35 + 30s - 45t

case D)
10×(3.5+3s−4.5)----> 35+30s-45----> is not equivalent

case E)
( 35/2 - 15s + 45/2t) ⋅ (-2)--->-35+30s-45t---> is not equivalent

the answer is
B. 5(7+6s−9t)
C. (−35−30s+45t)×(−1)

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Among fatal plane crashes that occurred during the past 55 years, 415 were due to pilot error, 96 were due to other human err

azamat

Answer:

Relative frequency:

$\text{Pilot error}=415/1370=0.30\\\\\text{Other human error}=96/1370=0.07\\\\\text{Weather}=169/1370=0.12\\\\\text{Mechanical problems}=622/1370=0.45\\\\\text{Sabotage}=68/1370=0.05\\\\$

The most serious threat to aviation safety is, according to this data, "mechanical failures". It can be improved by more rigorous inspection and better maintenance policies and execution.

Step-by-step explanation:

We have the data for fatal plane crashes. The sum of plane crashes is

We can calculate the relative frequency as:

$\text{Pilot error}=415/1370=0.30\\\\\text{Other human error}=96/1370=0.07\\\\\text{Weather}=169/1370=0.12\\\\\text{Mechanical problems}=622/1370=0.45\\\\\text{Sabotage}=68/1370=0.05\\\\$

We can see that the most frequent cause is "mechanical problems", with a relative frequency of 0.45.

4 0

3 years ago

How do I do this? I need it in perimeter to 2 decimal places. Thank you!

ad-work [718]

Answer:

The perimeter is 127.1 cm

Step-by-step explanation:

30+25+25=80

(2)(3.14)(15)=94.2

94.2/2=47.1

Divide by two because of the semicircle

80+47.1=127.1

8 0

3 years ago

Read 2 more answers

Find the value of x. 75° 3x° X = degrees

kipiarov [429]

Explanation:
Sum of all angles= 180 degrees

So,
3x + 75= 180
3x= 180 - 75
3x= 105
x= 105/3
x= 35

Answer= 35 degrees

5 0

3 years ago

Jeweler self buys a ring from an artist on for $85 he sells the ring in his store at 135% increase in price, what is the retail

kogti [31]

The ring's retail price is $199.75

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3 years ago

An element with mass 780 grams decays by 17.1% per minute. How much of the element is remaining after 19 minutes, to the nearest

VikaD [51]

Answer:

22.1 grams

Step-by-step explanation:

At the end of each minute, (1 -17.1%) = 82.9% of the element remains. At the end of 19 minutes, the quantity has been multiplied by that value 19 times, so the remaining amount is ...

(780 g)(0.829^19) ≈ 22.1 g

After 19 minutes 22.1 grams remain.

3 0

3 years ago