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Rudik [331]
3 years ago
13

Why do we use variables, and what is the significance of using them in expressions and equations?

Mathematics
1 answer:
Olin [163]3 years ago
5 0
Variables are letters from the end of the alphabet
Economics always uses the firsts letter of whatever that letter is representing.

<span> An </span>expression<span> such as 4x</span>3<span> is a </span>variable<span>. It can assume different values because x can assume different values.</span>
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Square ABCD is shown below.
valentina_108 [34]

Answer:

35 is the length of BE

Step-by-step explanation:

2(2x + 5) = 8x - 50

4x + 10 = 8x -50

10+50 = 8x-4x

60= 4x

15 = x

2x + 5 = length of BE equal to length of DE

2(15) +5 = BE

30 +5

35 is the length of BE

6 0
2 years ago
Helen ate 1/10 of a cake. She divided The remainder into 3 equal portions. What fraction of the cake was in each portion
Vlad1618 [11]

Answer:

As she ate 1/10 of cake, we need to know how many cake remains after it, so we can substract:

1 - 1/10 = 10/10 - 1/10 = 9/10

Then, we need to divide the 9/10 into 3 portions:

(9/10) / 3 = 9/30 = 3/10

So we know the fractions would be 3/10 each on this situation..

6 0
2 years ago
help me PIZThis is a picture of a cube and the net for the cube.What is the surface area of the cube? k12
Sunny_sXe [5.5K]

Answer:

486 in²

Step-by-step explanation:

9x9x6=486 in²

5 0
3 years ago
HELP ASAP
Natalija [7]

Answer:

The equation of the function: y = mx + b

  • m = slope = (y₂ - y₁)/(x₂ - x₁) = [5 - (-3)]/(4 - 0) = (5 + 3)/4 = 8/4 = 2
  • b = y-intercept = -3

Therefore, the equation is <u>f(x) = 2x - 3</u>

When x = 0, f(x) = 2(0) - 3 = <u>-3</u>

When x increases by 1, f(x) increases by <u>2</u> (slope = the rate of change)

5 0
2 years ago
What does fregmant means
disa [49]

Answer: A section of something

Step-by-step explanation: A section of something

4 0
3 years ago
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