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3 years ago

What the difference of -5-(-9)?

Mathematics

2 answers:

Svet_ta [14]3 years ago

5 0

Answer:

Step-by-step explanation:

-5-(-9)

when subtracting by a negative like : -(-9) it will cancel into it being + that number so -5 + 9 is 4

Dafna11 [192]3 years ago

3 0

Answer:

Step-by-step explanation:

Subtracting a negative number from a negative number – a minus sign followed by a negative sign, turns the two signs into a plus sign. So, instead of subtracting a negative, you are adding a positive. Basically, - (-4) becomes +4, and then you add the numbers. For example, say we have the problem -2 - –4.

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20 POINT QUESTION!! Complete the equation of the linear function. y = x +

Viefleur [7K]

$A=(0,1); B=( \frac{1}{2}, 0) \\ 
y=ax+b
 
\left \{ {{1=0a+b} \atop {0= \frac{1}{2}+b }} \right. \\ 
 \left \{ {{1=b} \atop { \frac{1}{2}a=-b}} \right. \\ 
 \left \{ {{b=1} \atop {a=-2}} \right. 

y=-2x+1$

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3 years ago

One crate can hold 8 cases of trading cards.How many crates are needed to hold 128 cases of trading cards?

Lunna [17]

16 crates to hold all 128 cases of trading cards

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3 years ago

-20 = -5 - 3x I need help on this

igor_vitrenko [27]

Answer:

x=5

Step-by-step explanation:

add 5 to both sides

-20+5 = -3x

-15=-3x (divide)

x=5

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3 years ago

What is 6 1/4 x 3 3/5

aliya0001 [1]

Answer:

Step-by-step explanation:

Change mixed fraction to improper fraction. Then reduce to lowest term if possible.

6 1/4 x 3 3/5 = 25/4 * 18/5 = 25* 18 /4*5

= 5 * 18 / 4 {giving by 5th table}

= 5* 9 /2 { giving by 2nd tables}

= 45/2

8 0

3 years ago

<img src="https://tex.z-dn.net/?f=%5Cleft%20%5C%7B%20%7B%7Ba%5E2%20-2a-b%5E2%3D0%7D%20%5Catop%20%7B2b%2B2ab%3D0%7D%7D%20%5Cright

oksian1 [2.3K]

Given :-

a² - 2a - b² = 0
2b + 2ab = 0

To find :-

Value of a and b .

Solution :-

Taking second equation:-

2b + 2ab = 0
2b ( 1 + a ) = 0
2b = 0 or (1+a) = 0
b = 0 , a = -1

Substitute in first equation :-

a² - 2a - b² = 0

When b = 0 ,

a² - 2a - 0² = 0
a² - a = 0
a( a -1) =0
a = 0 , 1

When a = -1 ,

(-1)² - 2*(-1) - b² = 0
1 + 2 - b² = 0
b² = 3
b = ±√3

Answer :-

a = 0,1 ; b = 0
a = -1 , b = ±√3

8 0

2 years ago