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Leokris [45]
4 years ago
12

A letter that represents a number

Mathematics
1 answer:
shtirl [24]4 years ago
7 0
That would be a variable, x being one of the most commonly used variables to represent unknown numbers.
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The values of x and y vary directly and one pair of values are given. Write an equation that relates x and y. x=-4,y=6
makkiz [27]

Answer:

Step-by-step explanation:

If two variables are directly proportional, it means that an increase in the value of one variable would cause a corresponding increase in the other variable. Also, a decrease in the value of one variable would cause a corresponding decrease in the other variable.

Given that x varies directly with y, if we introduce a constant of proportionality, k, the expression becomes

x = ky

If x = - 4 when y = 6, then

- 4 = 6k

k = - 4/6 = - 2/3

Therefore, the equation that relates x and y is

x = -2y/3

5 0
4 years ago
Three sweets have a mass of 9g. How many sweets have a mass of 24g?
konstantin123 [22]
<h2> <u>Answer </u><u>:</u><u>-</u></h2>

\tt \pink{8 \: sweet}

<h2><u>Given </u><u>:</u><u>-</u></h2>

Mass of 3 sweets = 9 g

<h2><u>To </u><u>Find</u><u> </u><u>:</u><u>-</u></h2>

Total sweets of 24 g

<h2><u>Solution</u><u> </u><u>:</u><u>-</u></h2>

Firstly we will find weight of 1 sweet

Weight of one sweet = 9/3 = 3 g

Total sweet of 24 g = 24/3 = 8 sweet

3 0
3 years ago
12 donuts cost $6.96. What is the unit rate for one donut?
drek231 [11]

Answer:

6.96/12

= 0.58

Step-by-step explanation:

each donut costs $0.58. you can check the work by plugging 12 in for x.  (0.58x)

i hope this helps :)

5 0
3 years ago
Solve for x and round to the nearest tenth. please help! i will mark brainliest.
Murljashka [212]

Answer:

25 divided by 40=0.625 rounded is 0.6 is ur answer!

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Help plzzzSolution set of 25x2 – 1 = 0 is ____________.
kari74 [83]

Answer:

x = 1/5 ,  and   x = - 1/5

Step-by-step explanation:

25x² – 1 = 0

5²x² - 1² = 0

(5x - 1)(5x + 1) = 0

5x -1 = 0,  5x + 1 = 0

x = 1/5 ,     x = - 1/5

8 0
4 years ago
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