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4 years ago

Explain what the variable represents in an addition or subtraction expression

2 answers:

7 0

<span>A variable always represents <u>an unknown quantity</u>.
We have to have some method to solve for an unknown, and we must have something to hold the place of the unknown, so we use a variable.</span>

Scrat [10]4 years ago

5 0

The variable represents something that is unknown. If I want to know what to subtract from 13 to get 10, I would say 13-X=10
In this problem the Variable is X, but you can use any letter or symbol, I would not use "S", "O", or "l" to represent a variable, because they can look like 5, 0, and 1.

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SOMEONE PLZ GELP WITH NUMBER ONE.

vitfil [10]

Answer:

900

Step-by-step explanation:

Each group of 3 starred angles plus the 4th angle which is an interior angle of the triangle has a total measure of 360 degrees. The sum of the measures of the three angles of the triangle is 180 degrees.

total measure of the starred angles = 4 * 360 - 180

total measure = 900 degrees

7 0

3 years ago

about 1300 organ specimens are preserved in fluid. Typically contains 7/10 alcohol and 3/10 water. if one jar contains 19 pins o

DerKrebs [107]

5.7 pints would be water

3/10 of 19 pints are water

19*(3/10) = 5.7

4 0

3 years ago

Line A passes through the coordinate points (-2/5,0) and (0,1). Which of the following lines will line A never intersect?

expeople1 [14]

Answer:

Option B

Step-by-step explanation:

Only lines which are parallel to the line which connects the given two points will neve r intersect,

parallel line has same slope

the slope of the line which connects the given two points is, 5/2

and the line is option B also has the same slope, so those two lines will never intersect each other.

Answered by GAUTHMATH

4 0

3 years ago

At the movie theater,the Clayton family bought 4 fountain drinks and 3 bags of popcorn and paid $22.75.how much is a fountain dr

Anna35 [415]

<h3><u>Question:</u></h3>

At the movie theater , the Clayton family bought 4 fountain drinks and 3 bags of popcorn and paid $22.50. The Hanks family bought 5 fountain drinks and 2 bags of popcorn and paid $23.75. How much is a fountain drink? How much is a bag of popcorn ?

<h3><u>Answer:</u></h3>

Cost of 1 fountain drink is $ 3.75 and cost of 1 bag of popcorn is $ 2.5

<h3><u>Solution:</u></h3>

Let "f" be the price of 1 fountain drink

Let "p" be the price of 1 bag of popcorn

Given that Clayton family bought 4 fountain drinks and 3 bags of popcorn and paid $22.50

4 x price of 1 fountain drink + 3 x price of 1 bag of popcorn = 22.50

$4 \times f + 3 \times p = 22.50$

4f + 3p = 22.5 -------- eqn 1

Also given that Hanks family bought 5 fountain drinks and 2 bags of popcorn and paid $23.75

5 x price of 1 fountain drink + 2 x price of 1 bag of popcorn = 23.75

$5 \times f + 2 \times p = 23.75$

5f + 2p = 23.75 -----------------eqn 2

<em><u>Let us solve eqn 1 and eqn 2</u></em>

Multiply eqn 1 by 2

2(4f + 3p = 22.5)

8f + 6p = 45 -------- eqn 3

Multiply eqn 2 by 3

3(5f + 2p = 23.75)

15f + 6p = 71.25 --------- eqn 4

<em><u>Subtract eqn 3 from eqn 4</u></em>

15f + 6p = 71.25

8f + 6p = 45

( - ) -------------------

7f = 26.25

f = 3.75

<em><u>Substitute f = 3.75 in eqn 1</u></em>

4(3.75) + 3p = 22.5

15 + 3p = 22.5

3p = 22.5 - 15

3p = 7.5

p = 2.5

Thus cost of 1 fountain drink is $ 3.75 and cost of 1 bag of popcorn is $ 2.5

8 0

3 years ago

A number line contains points Q, R, S, and T. Point Q is on the coordinate 24, R is on the coordinate 28, S is on the coordinate

Alex777 [14]

Answer:

72%

Step-by-step explanation:

QT has length 42-24 = 18.

ST has length 42-29 = 13.

The length ST is 13/18 ≈ 72.2% of the length of QT.

7 0

3 years ago

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