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3 years ago

If 1+1 =2 then what does 2+1=?

Mathematics

2 answers:

konstantin123 [22]3 years ago

8 0

Answer:

Step-by-step explanation:

if 1+1=2

than 2+1=3..

hope it is helpful

NeX [460]3 years ago

8 0

Answer:

TwEnTy OnE

Step-by-step explanation:

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6m-6=9m+15 (Show work)

9966 [12]

Answer:

$m=-7$

Step-by-step explanation:

$6m-6=9m+15$

Add 6 to both sides:

$6m-6+6=9m+15+6$

$6m=9m+21$

Subtract 9m from both sides:

$6m-9m=9m+21-9m$

$-3m=21$

Divide both sides by -3:

$\frac{-3m}{-3}=\frac{21}{-3}$

$m=-7$

6 0

3 years ago

Read 2 more answers

Which ordered pairs are solutions to the inequality 2x+3y≥−1 ?

Pavlova-9 [17]

There are many pairs that are solutions to this inequality. You can find them all by graphic this on a coordinate plane and then shading the region.

You can also plug any of the ordered pairs that they give you into the equation and see if they produce a true statement.

7 0

3 years ago

Solve the simultaneous equation 3x²-xy=0, 2y-5x=1

ratelena [41]

Answer:

(x, y) = (0, 1/2) or (1, 3)

Step-by-step explanation:

The first equation factors as ...

x(3x -y) = 0

This has solutions x=0 and y=3x.

x = 0

Using this in the second equation gives ...

2y -0 = 1

y = 1/2

(x, y) = (0, 1/2) is a solution

y = 3x

Using the expression for y in the second equation, we get ...

2(3x) -5x = 1

x = 1 . . . . . . . . . simplify

y = 3x = 3 . . . . using x=1 in the first equation

(x, y) = (1, 3) is a solution

_____

Interestingly, the (red line) graph of 3x^2 -xy = 0 produced by this graphing calculator has a "hole" at x=0, It says that point is (0, undefined). In a sense, y is undefined, in that it can be anything. A more appropriate graph would graph that equation as the two lines x=0 and y=3x.