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3 years ago

Mary is one year older than June, and their age add up to 15from a pair of equation and solve them to find the ages of the girls

Mathematics

1 answer:

FinnZ [79.3K]3 years ago

4 0

Answer:

Step-by-step explanation:

Let age of Jane = x

Mary's age = x + 1

Sum of both their ages = 15

x + x +1 = 15

2x + 1 = 15

Solution:

Subtract 1 from both sides

2x = 15- 1

2x = 14

Divide both sides by 2

x = 14/2

x = 7

Jane's age = 7

Mary's age = 8

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Zoe paid $18.60 in sales tax and tips for dinner. The sales tax rate is 11%, and she had tipped 20%. (the sale tax does not appl

zlopas [31]

Answer:

$60

Step-by-step explanation:

To find how much Zoe paid before the sales tax and tip, we first need to consider the amount she paid in sales tax and tips.

Sales tax + Tips = $18.60

Let x = original price

Sales tax = 11% * original price

Sales tax = 0.11 * x

x= 0.11x

Tips = 20% * original price

Tips = 0.20 * x

x = 0.2x

Now that we have a value for both the sales tax and tips, we can then proceed to find the original price by:

0.11x + 0.2x = 18.60

0.31x = 18.60

Now we need to divide both sides by 0.31 to find x.

x = 60

Zoe's dinner before the sales tax and tips was $60.

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3 years ago

Plz help!!!!!!!!!!!!

qaws [65]

Answer: $0

Steps:
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31,000 - 31,000 = 0

7 0

3 years ago

Read 2 more answers

Please help my assignment is due at 12:00!!

Brums [2.3K]

Answer: -13, -12.9

Step-by-step explanation:

pull out that HANDY DANDY calculator dog because we are about to go on a MATH ADVENTURE oh yea.

ok first make sure it is a reasonably good calculator but you can even use a calculator on your chromebook, maybe an online one? we need one that gives us PARENTHESES.

ok now you are going to want to input into this calculator, $(335 / 2)$ in other words 335 divided by 2. what do we get? we get

$167.5$

ok cool WE ARE MAKING PROGRESS HERE!!!

now i want you to look for the square root button, it looks like a radical like this

$\sqrt[2]{}$ or MAYBE IT DOESNT EVEN HAVE THE 2 and it is just: $\sqrt[]{}$

and press it, it should give you the square root but we want to find $\sqrt{167.5}$

and we get.....

$12.942...$

MY GOD THAT IS A SUPER LONG NUMBER! but its ok we only need 3 digits after the decimal. now notice that there is a negative sign behind that radical. thats radical, dude, ok now we have $-12.942...$

if we round to the nearest INTEGER then we need to round to the nearest WHOLE NUMBER which is

$-13$

and the nearest TENTH is one number after the decimal place so it would be...

$-12.9$

SURFS UP DUDE

P.S. i mention the parentheses because you can even do $\sqrt{(335/2)}$ (press square root button then opening parentheses then 335 / 2 then close parentheses and hit equal sign or ENTER) but dont forget that EPIC NEGATIVE SIGN!!!!!!!