Stefanie is painting her bedroom. She can paint square feet in of an hour. How many square feet can she paint in one hour?

The perimeter of and equilateral triangle is 60mm. What is the size of the other side?

Alex

Answer:

20mm

Since it a equilateral triangle we know that there is 3 sides and all of them are euqal. Therefore, 60/3 =20 meaning each side is 20mm.

8 0

3 years ago

What is the value of (y^-5/x^-3) for x = 2 and y = -4

Anastasy [175]

-1/1024）/（1/8
-1/1024）x 8
-8/1024
-1/128

5 0

3 years ago

Plz help! It’s not hard I just don’t properly understand

jonny [76]

Answer:

$a_{13}=2(13)+13=39$

39 is the 13th term

Step-by-step explanation:

Okay so essentially the $a_n$ is just a substitute for x.

See how in the equation they put n into the x spot:

$y=mx+b\\a_n=mn+b\\a_n=2n+13$

They changed the variable names:

$y=a_n\\m=2\\n=x\\b=13$

Now we know what the n actually means, plus when they ask about the terms youre trying to find it's based off of that n:

When they say, 13 term, they mean $a_{13}$ which would be the 13th answer in the series. So the first term would be based off of $a_1$

$a_1=2(1)+13\\a_1=15$

So whatever number is in the n position by a is what you'll be plugging into the x spot.

$y=mx+b\\a_n=2n+13\\a_1=2(1)+13=15\\a_2=2(2)+13=17\\a_3=2(3)+13=19\\a_4=2(4)+13=21\\a_5=2(5) +13=23\\a_6=2(6)+13=25\\a_7=2(7)+13=27\\a_8=2(8) +13=29\\a_9=2(9)+13=31\\a_{10}=2(10)+13=33\\a_{11}=2(11)+13=35\\a_{12}=2(12)+13=37\\a_{13}=2(13)+13=39$

These are all the answers leading up to the 13th term they asked for, and you can continue thus same equation with whatever number you can put into the n space.

7 0

2 years ago

2z - 31 = -9z + 24

SpyIntel [72]

You would combine like terms so the answer would be -7z-7

6 0

3 years ago

Read 2 more answers

Find how many positive integers with exactly four decimal digits, that is, positive integers between 1000 and 9999 inclusive, ha

zmey [24]

Answer:

(a) There are 257 numbers which are divisible by 5 and by 7