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3 years ago

Simplify the expression: 9r + -5r + 7 - 4 + -2r + -4

Mathematics

2 answers:

olga nikolaevna [1]3 years ago

7 0

Answer:

2r-1

I would appreciate if my answer is chosen as a brainliest answer

Amiraneli [1.4K]3 years ago

4 0

The photo has an answer for you

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PLZ help me fast 2 mins left

jek_recluse [69]

Answer:

$\sqrt{-5}=i\sqrt{5}$

$\sqrt{-25}=5i$

Step-by-step explanation:

i is an imaginary unit, this means

$i^2=-1$

Rewrite -5 as $5\cdot (-1)=5\cdot i^2,$

then

$\sqrt{-5}=\sqrt{5i^2}=\sqrt{5}\cdot \sqrt{i^2}=\sqrt{5}\cdot i=i\sqrt{5}$

Rewrite -25 as $-25=25\cdot (-1)=25\cdot i^2,$

then

$\sqrt{-25}=\sqrt{25\cdot i^2}=\sqrt{25}\cdot \sqrt{i^2}=5\cdot i=5i$

6 0

3 years ago

Is How many oranges did Sally eat last month? a statistical question

Yuri [45]

Answer:

Step-by-step explanation:

Lets say it's a 30 day month. Sally really likes oranges so she eats them a lot.

8 0

3 years ago

On the scale drawing of a car, the length from bumper to bumper is 6 inches. The car’s actual length, from bumper to bumper, is

dimulka [17.4K]

Answer:

3/8 in/ft
1/32 . . . (pure number, no units)

Step-by-step explanation:

The ratio can be expressed directly as ...

... (6 in)/(16 ft) = 3/8 in/ft

This can be read or used in different ways:

3/8 in = 1 ft
3 in = 8 ft

Or, the units can be made compatible and the ratio expressed as a pure number.

... (1/2 ft)/(16 ft) = (1/32) ft/ft = 1/32

This means whatever measurement is made on the model, the actual vehicle measurement is 32 times that.

4 0

4 years ago

If a man take one and a half mins to paint a door how much doors can he paint in seven half hour

sashaice [31]

Answer:

300 doors.

Step-by-step explanation:

1.5 minutes for 1 door.

7.5 hours for 300 doors.

7.5 hours = 450 minutes.

$\frac{450}{1.5}=300$

7 0

3 years ago

-|2-5| _________ (8-11) compare using < , > or =

Zolol [24]

Here is your answer

REASON:

On solving the given two terms

-|2-5|= -|-3|

= -3 (since |-3|=3)

and,

(8-11)

= -3

Hence,

-|2-5|  = (8-11)

HOPE IT IS USEFUL

4 0

3 years ago