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kifflom [539]
4 years ago
15

What is the sum of -2+9=

Mathematics
2 answers:
Oksanka [162]4 years ago
8 0
Your answer will be 7 

-2+9 is the same as 9-2

hope this helps 
noname [10]4 years ago
4 0
Same signs add and keep different signs subtract keep the sign of the higher number then you'll be exact. (This is a song I learned to help me with problems like these, sing it to the rhythm of row row row your boat) Your answer would be positive 7.
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Four years ago, Hakim borrowed $275 to help pay for new tires for his car. He agreed to pay interest at a simple annual interest
Paha777 [63]

Answer:

B)$319

Step-by-step explanation:

Interest each year is 275 × 4% = 275 × 4/100 = 11  

total interest over 4 years is 4 x 11 = 44  

total to repay after 4 years is 275 + 44 = 319

8 0
3 years ago
What is an equation for the line perpendicular to y = 3x – 1 that passes through (-9, -2)?
FinnZ [79.3K]

Answer:

  • y = -1/3x - 5

Step-by-step explanation:

<u>Perpendicular lines have negative reciprocal slopes, so the line is:</u>

  • y = -1/3x + b

<u>Finding the value of b, using the given point (-9, -2)</u>

  • -2 = -1/3*(-9) + b
  • -2 = 3 + b
  • b = -2 - 3
  • b = -5

<u>The line is</u>

  • y = -1/3x - 5
3 0
3 years ago
Two angles of a triangle are 47 and 32 degrees. Select all angles that could represent exterior angles of a triangle.
notsponge [240]

Answer:

133, 79, 148 are ALL possible, so select 133 and 79

Step-by-step explanation:

Subtract 47 and 32 from 180 to find the third angle of the triangle (it is 101).

Then do 180-101 = 79

180-32=148

180-47=133

That tells you the exterior angle of each. Only two possible choices on your list.

3 0
2 years ago
As of mid-2016, the world's population was about 7.4 billion people. The population of Country A was 226 million. In mid-2016, w
kherson [118]

Answer:

The percentage of country A population to the world population

= 3.05%

Step-by-step explanation:

Country A population as of 2016

= 226 million

= 226000000

The world population as of 2016

= 7.4 billion

= 7400000000

The percentage of country A population to the world population

= Country A population /The world population

The percentage of country A population to the world population

= 226000000/7400000000

The percentage of country A population to the world population

= 0.03054

Now multiplying by 100

= 3.05%

3 0
3 years ago
Triangular numbers can be represented with equilateral triangles formed by dots the first fire triangle numbers are 1 3 6 10 and
zhannawk [14.2K]

Answer:

There's no direct variation

Step-by-step explanation:

Required

Determine if there's a direct variation between the number and its position

I'll start by giving an illustration of how the triangle is represented using stars (*)

*

**

***

****

*****

Represent the line number with y and it's position with x

On line 1:

y = 1, x = 1

On line 2:

y = 2, x = 3

On line 3:

y = 3, x = 6

On line 4:

y = 4, x = 10

On line 5:

y = 5, x = 15

Note that, x is gotten by calculating the accumulated number of stars while y is the line number.

Direct variation is represented by

y = kx

Or

kx = y

Where k is the constant of variation

For line 1:

Substitute 1 for y and 1 for x

k * 1 = 1

k = 1

For line 2:

Substitute 2 for y and 3 for x

k * 3 = 2

Divide through by 3

k = ⅔

Note that the values of k in both computations differ.

This implies that there's no direct variation and there's no need to check further.

3 0
3 years ago
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