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adoni [48]
3 years ago
12

What does an equation have that an expression doesn't?

Mathematics
2 answers:
Akimi4 [234]3 years ago
4 0

Answer:

the answer is an equal sign

nignag [31]3 years ago
3 0

Answer:

An equal sign

Step-by-step explanation:

You might be interested in
What two numbers can add to 4 but multiple to -12
olasank [31]

Answer:

<em>Numbers: 6 and -2</em>

Step-by-step explanation:

<u>Equations</u>

This question can be solved by inspection. It's just a matter of factoring 12 into two factors that sum 4. Both numbers must be of different signs and they are 6 and -2. Their sum is indeed 6-2=4 and their product is 6*(-2)=-12.

However, we'll solve it by the use of equations. Let's call x and y to the numbers. They must comply:

x+y=4\qquad\qquad [1]

x.y=-12\qquad\qquad [2]

Solving [1] for y:

y=4-x

Substituting in [2]

x(4-x)=-12

Operating:

4x-x^2=-12

Rearranging:

x^2-4x-12=0

Solving with the quadratic formula:

\displaystyle x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}

With a=1, b=-4, c=-12:

\displaystyle x=\frac{-(-4)\pm \sqrt{(-4)^2-4(1)(-12)}}{2(1)}

\displaystyle x=\frac{4\pm \sqrt{16+48}}{2}

\displaystyle x=\frac{4\pm 8}{2}

The solutions are:

\displaystyle x=\frac{4+ 8}{2}=6

\displaystyle x=\frac{4- 8}{2}=-2

This confirms the preliminary results.

Numbers: 6 and -2

7 0
3 years ago
A 16 oz package of brown rice costs 79 cents and 32 oz package of white rice costs $3.49. Which package is a better buy
notka56 [123]
32 Oz of brown rice -> 79 * 2 = $1.58

The brown rice is better to buy because $1.52 is less than $3.49.

Please make this answer the brainiest~
7 0
3 years ago
Read 2 more answers
Benito is selling T-shirts for $8 each for his school fund-raiser. So far, he has sold 16 T-shirts. How many more does he need t
zhannawk [14.2K]
D. When you do the math, the results to everything should be t=9. D is the only outlier. Therefore, D is the answer in this case. 
4 0
3 years ago
2 3/5 ×5/6 = what does it equel
wolverine [178]
Your answer is 2 and 1/6

6 0
2 years ago
What is the absolute value of -4 - the square root of -2
ollegr [7]
The answer is 8 it should be
8 0
3 years ago
Read 2 more answers
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