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Dennis_Churaev [7]
3 years ago
13

1. Simplify this expression: 13+ (-12) - (-5) = ? O A.-30 O B.6 O C.30 OD. -6

Mathematics
2 answers:
Virty [35]3 years ago
8 0

Answer:

B.6

Step-by-step explanation:

When we add and subtract, we do it from left to right

13+ (-12) - (-5)

13+-12

13-12 = 1

1 - -5

A negative negative is a positive

1 +5

6

frozen [14]3 years ago
5 0

Answer:

B)6

Step-by-step explanation:

1) When solving an eqyation, always work from left to right

So

13-12=1

1-(-5)=6

*two negative signs like that make a positive*

Hope this helps!

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4
Evgesh-ka [11]

you just exchange the x with a+2 so it's b

6 0
2 years ago
Helppppppppppppppppppppp
algol13

Answer:

5,7,9

Step-by-step explanation:

(5,7,9)-4<8

5 0
3 years ago
Read 2 more answers
Please help me I need help please​
MakcuM [25]

Answer:

p = 4

Step-by-step explanation:

Given equation:

x^2+(p-3)y^2-4x+6y-16=0

<u>Standard equation of a circle:</u>

(x-a)^2+(y-b)^2=r^2

(where (a,b) is the centre of the circle, and r is the radius)

If you expand this equation, you will see that the coefficient of y^2 is always one.

Therefore, p-3=1

\implies p=1+3=4

<u>Additional information</u>

To rewrite the given equation in the standard form:

\implies x^2+y^2-4x+6y-16=0

\implies x^2-4x+y^2+6y=16

\implies (x-2)^2-4+(y+3)^2-9=16

\implies (x-2)^2+(y+3)^2=16+4+9

\implies (x-2)^2+(y+3)^2=29

So this is a circle with centre (2, -3) and radius √29

3 0
2 years ago
janie has 196 rock and country cd's that she listens to at home if there are 76 more rock cd's than country cds how many of each
marshall27 [118]
There are 60 Country CDs and 136 Rock CDs.

Rock and country CDs = 196

Country CD = x
Rock CD = x + 76

Country CD + Rock CD = 196
x + (x + 76) = 196
2x = 196 - 76
2x = 120
2x / 2 = 120 / 2
x = 60   * number of Country CD

Rock CD = x + 76 = 60 + 76 = 136 

To check:
Country + Rock = 196
60 + 136 = 196
196 = 196

4 0
3 years ago
56 divided (-10)<br><br> What is the answer?
ElenaW [278]

Answer:

-5.6

Step-by-step explanation:

56/-10 = -5.6

5 0
3 years ago
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