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goblinko [34]
3 years ago
13

Evaluate the expression -5-3+1

Mathematics
2 answers:
gayaneshka [121]3 years ago
7 0

Answer:

-7

Step-by-step explanation:

The rule for subtraction, in this case it is -5-3, you change the subtraction sign to addition and use the opposite of the second number, making it -5+(-3) which is -8. Then, you add 1 to -8, and the rule for this specific expression is to take the absolute value of both -8 and 1, then subtract the two, making the expression as of now 8-1. Subtract them, and get 7, but you take the sign of whichever number had the greatest absolute value, which was -8, so now the answer is -7. That's how you get your answer

-5-3+1= -5+(-3)+1

-8+1= |-8|-|1|

8-1= -7 (because you take the sign with the greatest absolute value, which is -8.)

hram777 [196]3 years ago
3 0

Answer:

The answer is -7

Step-by-step explanation:

-5 - 3 = -8

-8 + 1 = -7

Hope I helped :)

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Evaluate 4(a2 + 2b) - 2b when a = 2 and b = –2
amid [387]
First you simply have to substitute 2 in replace of all the a's, and -2 in replace of all of the b's

4((2)2+2(-2))

Then you want to follow the order of operations, PEMDAS (Parantheses-Exponent-Multiplication-Division-Addition-Subtraction), and multiply within the parantheses.

4(4+(-4))

Next you will add within the parantheses (So add the 4 and -4 together)

4(0)

Lastly multiply

0

Your answer is 0

Hope this helps!
5 0
3 years ago
Read 2 more answers
If the mean of a given data set is 56 and the standard deviation is 10
aleksley [76]

Answer:

5.6 divided by  10

  =5.6

Step-by-step explanation:

5 0
3 years ago
Find the difference. Write your answer in simplest form.
cestrela7 [59]

Answer:

Yes you are correct. 9/20 is correct.

Step-by-step explanation:

7 /10   - 1 /4  =  

7 * 2 / 10*2  

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8 0
2 years ago
What is the interval notation for all real numbers?
ankoles [38]

Answer:

15 15 17 17 19 30

Step-by-step explanation:

to ne and to 69 04 16 97 50 27

4 0
3 years ago
Se quiere cubrir una pared con vidrios de forma triangular. La pared mide 36 m de largo y 9V3 m de alto.
Eddi Din [679]

Based on the dimensions of the wall and the triangular glass, the number of mirrors needed is 215 mirrors.

<h3>What number of mirrors are needed?</h3>

First find the area of the wall:

= 36 x 93

= 3,348 m²

The area of the triangle, assuming it is an equilateral triangle is:

= (√3/4) x 6²

= 15.59 m²

The number of mirrors needed is:

= 3,348 / 15.59

= 215 mirrors

Find out more on the area of an equilateral triangle at brainly.com/question/1099318.

#SPJ1

4 0
2 years ago
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