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3 years ago

Why do you change the sign when subtracting a negative number?

Mathematics

2 answers:

natulia [17]3 years ago

5 0

This is because minus times minus is equals plus so the sign must change

jeka57 [31]3 years ago

3 0

Suppose I am in debt to someone to the value of $5. Then we can say that my net worth is -5. Now my friend wants to help me out with my debt by 'taking away' the -5. He can do this by giving me $5 and now my debt is zero.

so we can say that these 2 are equivalent -5-(-5) = -5 + 5 = 0.

Hope this helps.

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Plzz help i need to defeat a boss

maw [93]

Answer:

4.78 m

Step-by-step explanation:

From cm to m, you would need to divide 100 to get your conversion answer which is 4.78 m.

5 0

3 years ago

The length of a living room is 12 feet and its width is 1012 feet. The length of the room is being expanded by x feet. Choose an

Ivanshal [37]

Answer:

Option C. 10.5(12 + x) square feet

Option E. (126 + 10.5x) square feet

Step-by-step explanation:

step 1

Find the area of the original living room

we know that

The area of the original living room is equal to

$A=LW$

we have

$L=12\ ft\\W=10\frac{1}{2}\ ft=10.5\ ft$

substitute

$A=(12)(10.5)=126\ ft^2$

step 2

Find the new area of the living room

The length of the room is being expanded by x feet

we have

$L=(12+x)\ ft\\W=10.5\ ft$

The new area is

$A=10.5(12+x)\ ft^2$

The expanded form of the expression is

Apply distributive property

$A=10.5(12)+10.5(x)\\A=(126+10.5x)\ ft^2$

6 0

4 years ago

You have inherited land that was purchased for $30,000 in 1960. The value of the land increased by approximately 5% per year. Wh

Alexxandr [17]

Answer:

$361,223

Step-by-step explanation:

Each year, the value is multiplied by 1+5% = 1.05. After 51 years, it has been multiplied by that factor 51 times, so is now ...

$30,000×1.05^51 ≈ $361,223

6 0

3 years ago

** ANSWER ASAP **<br><br><br>am i correct?

aliina [53]

Answer:

Correct option is (A).

Step-by-step explanation:

BECAUSE,

# Supplementary means whose sums are 180°.

# 1 and 3; 2 and 4 are not supplementary.

#$# HOPE YOU UNDERSTAND #$#

#$¥ THANK YOU ¥$#

❤ ☺ ☺ ☺ ☺ ☺ ☺ ❤

5 0

3 years ago

What’s the y-intercept for 10/-5

irinina [24]

Answer:

-2

Step-by-step explanation:

3 0

3 years ago