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3 years ago

In an equation what does the floating dot mean?

Mathematics

2 answers:

max2010maxim [7]3 years ago

5 0

That is just another symbol for multiplication. hope this helps:)

4vir4ik [10]3 years ago

5 0

If it looks like this, 4-1 ( except the dash a period point) then that is just another sign for multiplication.

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Write an expression in simplest form that represents the total amount. Suppose you buy 3 shirts that each cost s dollars, a pair

charle [14.2K]

Answer:

Step-by-step explanation:

3 shirts that each costs s dollars would be 3s

jeans is $30, pair of shoes is $50, add $30+$50 and you'll end up with $80

so, an expression in the simplest form that represents the total cost would be:

d. 3s+80

5 0

3 years ago

Ryan mows lawns in the summer. He charges $15 for every 1/2 hour of mowing. This is represented by the equation y = 15x, where y

AleksandrR [38]

Answer:

$45 more

(but honestly I think I would spend longer mowing their lawns to try and make some more profit)

Step-by-step explanation:

Mr. Smith requires 4 1/2 hours.

Mrs Jones requires 7 1/2 hours.

7 - 4 = 3

3 * 15 = $45

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3 years ago

Molly has a jar full of quarters she uses to do laundry at the laundromat near her apartment. She uses about the same number of

Lynna [10]

Go to Math Papa on google?

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3 years ago

The salary of teachers in a particular school district is normally distributed with a mean of $50,000 and a standard deviation o

andrey2020 [161]

Answer:

D. 54,900

Step-by-step explanation:

We have been given that the salary of teachers in a particular school district is normally distributed with a mean of $50,000 and a standard deviation of $2,500.

To solve our given problem, we need to find the sample score using z-score formula and normal distribution table.

First of all, we will find z-score corresponding to probability $0.975(1-0.025)$ using normal distribution table.

From normal distribution table, we get z-score corresponding is $1.96$ .

Now, we will use z-score formula to find sample score as:

$z=\frac{x-\mu}{\sigma}$ , where,

$z$ = Z-score,

$z$ = Sample score,

$\mu$ = Mean,

$\sigma$ = Standard deviation

$1.96=\frac{x-50,000}{2,500}$

$1.96*2,500=\frac{x-50,000}{2,500}*2,500$

$4900=x-50,000$

$4900+50,000=x-50,000+50,000$

$54900=x$

Therefore, the salary of $54900 divides the teachers into one group that gets a raise and one that doesn't.

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3 years ago

ellie says, "when i round these three numbers, i get the same number for two of them." anthony says, "hmmm, when i round these n

Stells [14]

Answer:

Ellie is correct because 1,483 and 1,454 would round up to 1,500 but the 1,250 would round up to 1,300

Step-by-step explanation:

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3 years ago