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hram777 [196]
3 years ago
9

-(-21) = -21 true or false

Mathematics
2 answers:
Kryger [21]3 years ago
8 0

Answer:

False

Step-by-step explanation:

-(-21) is positive 21 since there are 2 negative signs, and -21 is negative, therefore they are not the same.

Hope this helps!

jarptica [38.1K]3 years ago
6 0

Answer:

False. It is equal to 21.

Step-by-step explanation:

-(21) would equal -21

However,

- (- 21) equals 21

The two negatives "cancel" each other out.

Answer: False. It is equal to 21.

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A total of 1,650 boxes of Girl Scout cookies were sold last week. Each large box cost $3.50 and each small box cost $2.00. The G
s344n2d4d5 [400]

Answer:

900 large boxes were sold, and 750 small boxes.

Step-by-step explanation:

This question can be solved by a system of equations.

I am going to say that:

x is the number of large boxes of cookies sold.

y is the number of small boxes of cookies sold.

A total of 1,650 boxes of Girl Scout cookies were sold last week.

This means that

x + y = 1650

So

x = 1650 - y

Each large box cost $3.50 and each small box cost $2.00. The Girl Scout group earned $4,650.

This means that

3.5x + 2y = 4650

Since x = 1650 - y

3.5(1650 - y) + 2y = 4650

5775 - 3.5y + 2y = 4650

1.5y = 1125

y = \frac{1125}{1.5}

y = 750

x = 1650 - y = 1650 - 750 = 900

900 large boxes were sold, and 750 small boxes.

8 0
2 years ago
Despite the heavy reliance on e-mail, in certain situations calling may be the most efficient channel of communication, whether
tensa zangetsu [6.8K]

Answer:

Be cheerful and accurate

Step-by-step explanation:

There are other etiquette that may be put in consideration.

★Answer the call within three rings.

★Immediately introduce yourself.

★Speak clearly.

★Only use speakerphone when necessary.

★Actively listen and take notes.

★Use proper language.

Remain cheerful.

★Ask before putting someone on hold or transferring a call.

★Be honest if you don't know the answer.

★Be mindful of your volume.

★Check for and respond to voicemails.

8 0
3 years ago
Which of the following is NOT a treatment for high blood pressure?
abruzzese [7]

Answer: Aerobic exercise

4 0
3 years ago
Read 2 more answers
Quadrilateral PQRS is similar to Quadrilateral LMNO.
ruslelena [56]

Answer:

2.5

Step-by-step explanation:

so LM is 3 right, right?

so PQ is 6

what they did to get that is they doubled 3 so 3x2=6

so if we divide 5 by 2 we get 2.5 because 2.5+2.5= 5

and that is how i got 2.5

╦___________________________________╦

│Hope this helped  _____________________│

│~Xxxtentaction ^̮^ _____________________│

╩___________________________________╩    

4 0
3 years ago
The length of an object in feet is equal to three times it's links in yards. The length of a waterslide is 48 feet. Right and so
disa [49]
Formula:

1 yard = 3 feet

x yards = 48 feet

Equation:


48 / 3 = x

 
3 0
3 years ago
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