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Arte-miy333 [17]
3 years ago
14

Write an equivalent expression by distributing the "-−" sign outside the parentheses: -(-4.2w-7x-5.4)

Mathematics
1 answer:
lord [1]3 years ago
3 0

Answer: 4.2*w + 7*x + 5.4

Step-by-step explanation:

Here we need to remember how the product of different signs works, here is the rule:

(+)*(+) = (+)

(+)*(-) = (-)

(-)*(+) = (-)

(-)*(-) = (+)

Now we want to distribute the negative sign in the equation:

"-(-4.2w-7x-5.4)"

We can write this as:

-(-4.2w-7x-5.4) = (-1)*(-4.2w-7x-5.4)

Now we can distribute the "-1"

Then we get:

(-1)*(-4.2w) + (-1)*(-7x) + (-1)*(-5.4)

We have 3 cases where we need to use the "(-)*(-) = (+)" rule, then we get:

(-1)*(-4.2w) + (-1)*(-7x) + (-1)*(-5.4) = 4.2*w + 7*x + 5.4

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It's the last one

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An airplanes altitude changed -415 feet over 5 minutes.what was the mean change of altitude in feet per minute
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83 ft per minute an that is how I got my awnser
8 0
3 years ago
it take the earth 24 hours to complete a full rotation it takes saturn approximately 10 hours 39 minutes and 24 seconds to compl
Lelu [443]

Hey there!!

1 min - 60 seconds, as we have a value in seconds, first let us convert it into seconds

10 hours 39 minutes 24 seconds

24 seconds is already is seconds , so let us keep it aside

39 into seconds

as 1 min = 60 seconds

39 min = 60 × 39 seconds

= 2340 seconds

10 hours into seconds

1 hour = 60 min

60 min  60 × 60 seconds

= 3600 seconds

as it 10 hours ,

3600 × 10

= 36000 seconds

add them all up

36000 + 2340 + 24

total seconds = 38364 seconds

as 1 min = 60 seconds

we can write this as

60 seconds = 1 min

then

38364 seconds = ? min

38364 seconds = 38364 / 60 min

= 639.4 minutes

The required answer is 639.4


3 0
3 years ago
Avery measured a line to be 14.7 inches long. If the actual length of the line is 14.5 inches, then what was the percent error o
seraphim [82]

Answer:

  1.4%

Step-by-step explanation:

Avery's error was ...

  measured - actual = 14.7 in - 14.5 in = 0.2 in

As a fraction of the actual length, that is ...

  (0.2 in)/(14.5 in) × 100% ≈ 1.4%

The measurement error was about 1.4%.

7 0
3 years ago
The equation
Soloha48 [4]

Answer:

9 weeks

Step-by-step explanation:

5w+16=61

Subtract 16 from both sides of the above equation.

5w+16-16=61-16

5w = 45

w = 9

8 0
3 years ago
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