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3 years ago

If a = -2.6, what is the value of -a

Mathematics

2 answers:

7nadin3 [17]3 years ago

8 0

if a = -2.6

then -a = -(-2.6)

so -a =2.6

Maksim231197 [3]3 years ago

6 0

-2.6 + -2.6= 5.2......right? Or am I looking at this wrong?

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Ares of a rectangular floor of your house is Ax+5x-2. if the length is x+2 units, find A

Snezhnost [94]

Answer:

A=4.

Step-by-step explanation:

Note: In the expression of area the first term should be $Ax^2$ .

It is given that area of a rectangular floor of your house is $Ax^2+5x-2$ and the length is $(x+2)$ units.

We know that, area of a rectangle is

$Area=length\times width$

Since length of the rectangle is $(x+2)$ , therefore $(x+2)$ is a factor of $Ax^2+5x-2$ and the value of $Ax^2+5x-2$ is 0 at x=-2.

$A(-2)^2+5(-2)-2=0$

$4A-10-2=0$

$4A-12=0$

$4A=12$

Divide both sides by 4.

$A=4$

Therefore, the value of A is 4.

7 0

3 years ago

What is the best method to solve the system of equations? 2x + 3y = 8 4x - 6y = 2?

Nana76 [90]

Answer: x = 9/4, y = 7/6

║2x + 3y = 8
║4x - 6y = 2

║4x + 6y = 16
║4x - 6y = 2

Add both equations together:

8x = 18
x = 9/4

Sub x = 9/4 into 2x + 3y = 8
2(9/4) + 3y = 8
9/2 + 3y = 8
3y = 7/2
y = 7/6

5 0

4 years ago

PLEASE DONT COPY THE ANSWER FROM SOMEWHERE ELSE PLEASE

klio [65]

2x+x=36
Kim's Sister age

2x+x=36 Add "x and 2x"
3x=36 Divide both sides by 3
÷3 ÷3
x=12
Kim's sister is 12 years old
Soo....
Multiply that by two to get Kim's age

12•2=24 Kim is 24 years old.

8 0

3 years ago

I need help solving this

Shtirlitz [24]

X+5=2x-7

x=12

y=12+5

y=17

(12, 17)

5 0

4 years ago

Read 2 more answers

Help Pleaseee!! I need help ASAPP

Over [174]

Answer: