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lbvjy [14]
3 years ago
13

One thumbtack weighs 0.25 ounce. How many thumbtacks are in a box that has a mass of 3500 grams? (Hint: 1oz ~28g

Mathematics
1 answer:
Marina86 [1]3 years ago
7 0
Alright so .25 oz is 1/4 of 1oz.  Therefore you take 28 and divide it by 4 and get 7.

Then take 3500 and divide it by 7 which makes 500 thumb tacks.

I think idk though.
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Which expression is equal to (32)(8)(5x) using the associative property?
Yuliya22 [10]
Seeing as there are no answer choices, here are all the answers I would think to make. Quick note, associative property of multiplication states that you can change the parenthesis/order of your multiplication in any order and it will stay true, example: (5)(8)(3)=40*3 and 24*5.
Answers: (32)(40)(x), (32)(40x), (32)(8)(5)(x), (32)(8x)(5), (160)(8x), (160x)(8), (160)(8)(x), (32x)(8)(5), (256x)(5), (256)(5x), (256)(5)(x), (1280)(x), (1280x)
7 0
3 years ago
Hi, please help me out :)) thank you
r-ruslan [8.4K]

Answer:

d =32

Step-by-step explanation:

\sqrt{7d+1}-4=11\\\\\mathrm{Add\:}4\mathrm{\:to\:both\:sides}\\\sqrt{7d+1}-4+4=11+4\\\\Simplify\\\sqrt{7d+1}=15\\\\\mathrm{Square\:both\:sides}:\quad 7d+1=225\\7d+1=225\\\\\mathrm{Solve\:}\:7d+1=225:\\\quad d=32

4 0
3 years ago
Read 2 more answers
What is the slope of a line that goes through the points (2, 5) and (8, 6) ?
jenyasd209 [6]

Answer:

m = 1 / 6

Step-by-step explanation:

Use this formula y2 - y1 / x2 -x1 to find the slope.

6 - 5 / 8 -2 = 1/6

8 0
3 years ago
10 times for thousands equals blank thousand equals blank
Marianna [84]
10×4,000=40,000 because all u do is add an extra zero everything you multiple something by ten
5 0
4 years ago
Beginning one month after birth of their son, Noah, the Nelsons deposited $100 each month in an annuity for his college fund. Th
gizmo_the_mogwai [7]

Answer:

$100 * (1 + 6.8%/12)^216 + $100*(1+6.8%/12)^215 + ... + $100*(1+6.8%/12)^1  

Now note that  

x + x^2 + x^3 + ... + x^N = x ( 1 + x + ... + x^(N-1) )  

= x ( (x^N -1)/(x-1) )  

Here, x = 1+6.8%1 = 1.00566666 and N = 216, so  

$100 * ( 1.00566666 ( 1.00566666^216 -1) / 0.00566666 )  

= $ 42398.33  

The total interest earned is $42,398 - $21,600 = $20,798

Step-by-step explanation:

The generic formula used in this compound interest calculator is V = P(1+r/n)^(nt)

V = the future value of the investment

P = the principal investment amount

r = the annual interest rate

n = the number of times that interest is compounded per year

t = the number of years the money is invested for

8 0
4 years ago
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