3 years ago

WILL GIVE BRAINLIEST IF CORRECT!

Mathematics

2 answers:

kodGreya [7K]3 years ago

7 0

Answer:

1/24

Step-by-step explanation:

1/6 / 4

1/6 x 1/4

1/24

garri49 [273]3 years ago

7 0

0.41667 is the decimal or 1/24

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2. Determine the sum of the first 400 ODD numbers.<br><br>

il63 [147K]

Odd numbers take the form $2n-1$ , where $n\ge1$ is an integer. When $n=400$ , the last odd number would be 799. So we're adding

$S=1+3+5+\cdots+795+797+799$

By reversing the order of terms, we have

$S=799+797+795+\cdots+5+3+1$

and we can pair up terms in both sums at the same position to write

$2S=(1+799)+(3+797)+(5+795)+\cdots(795+5)+(797+3)+(799+1)$

so that we are basically adding 400 copies of 800, and from there we can find the value of the sum right away:

$2S=400\cdot800\implies S=160,000$

###

We could also make use of the formulas,

$\displaystyle\sum_{i=1}^n1=n$

$\displaystyle\sum_{i=1}^ni=\dfrac{n(n+1)}2$

We have

$S=\displaystyle\sum_{i=1}^{400}(2i-1)=2\sum_{i=1}^{400}i-\sum_{i=1}^{400}1=400(400+1)-400=400^2=160,000$

3 0

3 years ago

Hiiiiiii friend me plzz i will do more like this

olga55 [171]

Answer:

Step-by-step explanation:

8 0

3 years ago

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You select a card at random from the cards that make up the word “replacement”. Without replacing the card, you choose a second

musickatia [10]

Replacement = 11 total

probability of choosing a consonant = 7/11
without replacing the card
probability of choosing an e = 3/10

probability of choosing both = 7/11 * 3/10 = 21/110 <===

8 0

3 years ago

If 3 pounds of grass seed covers 80 square feet, how many pounds are needed to cover 340 square feet?

Arada [10]

Answer:

48.75

Step-by-step explanation:

340/80=16 1/4

16 1/4*3=48.75

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3 years ago

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Aidan makes 12 bracelets on Monday.He makes 8 more bracelets each day from Tuesday through Thursday.How many bracelets does Aida

r-ruslan [8.4K]

Well if he started with 12 and made 8 each day from that point foward that would mean 8 times 4 plus 12 so the answer would be 44 bracelets. but if he makes 12 on friday then it would be 48 bracelets.

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3 years ago