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dem82 [27]
3 years ago
7

Student council hosted a bake sale of the 40 items brought to sale 18 were brownies. what percent of the bake sale were Brownies

Mathematics
1 answer:
LuckyWell [14K]3 years ago
7 0

Answer:

45 percent were brownies :)

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Compute 1 + 2 + 3 + 4 + ... +48 +49 + 50.​
ad-work [718]

Answer:

1275

Step-by-step explanation:

This is an arithmetic series. The formula for this is Sₙ = (n/2)(a₁ +aₙ)d. a₁ is the first term, so here it is 1, and aₙ is the nth term, or the last term, which is 50 here, but we don't know n.

Now we have to use the equation for an arithmetic sequence to solve for n. A sequence would just be if there was not a last number and it went on forever. that equation looks like aₙ = a₁ + (n - 1)d. Now the only new variable is d, which is the common difference. You can find that by subtracting one term from the term before it, like 2-1 = 1, so d is 1.

We can now solve for n by plugging our numbers into the second equation, so 50 = 1 + (n - 1)1, we can distribute the 1 and to (n-1) and get 50 = 1 + n - 1. Now the ones will cancel and we are left with n = 50

Finally we can plug everything into our original equation and find Sₙ = (50/2)(1+50), which simplifies to Sₙ = 25(51), and Sₙ = 1275.

4 0
3 years ago
Read 2 more answers
Of the CP of 15 articles equals to the SP of 12 articles, find the gain percent.<br>an<br>ple 4:​
Rasek [7]

<u><em>Question</em></u>

<em>If the CP of 15 articles equals to the SP of 12 articles, find the gain percent.</em>

<em></em>

Answer:

gain percent = 25%

Step-by-step explanation:

To solve the question given, we will follow the steps below:

gain%  =   \frac{s.p - c.p}{c.p}  ×    100%

But from the question;

"CP of 15 articles equals to the SP of 12 articles", this implies that

15 c.p  =  12 s.p

s.p = 15c.p  /   12

s.p  = \frac{15 c.p}{12}       =   \frac{5c.p}{4}

s.p  =  \frac{5c.p}{4}

substitute  s.p  =  \frac{5c.p}{4}   into the formula

gain%  =   \frac{s.p - c.p}{c.p}  ×    100%

      =\frac{\frac{5c.p}{4} -  c.p }{c.p}     ×    100%

       =  \frac{\frac{5c.p - 4c.p}{4} }{c.p}      ×    100%

  =   \frac{c.p}{4}   ÷   c.p      ×    100%

= \frac{c.p}{4}     ×   \frac{1}{c.p}    ×    100%

=   \frac{1}{4}  ×    100%

=  25 %

3 0
3 years ago
Which is more 8.83 or 8.9
Artemon [7]

Answer:

8.9

Step-by-step explanation:

If you think of 8.9 as 8.90, then it's obvious that 8.90 (or 8.9) is greater than 8.83.

5 0
2 years ago
Read 2 more answers
store a sells a 100 oz bottle of cleaner for $12.99 store B sells the same cleaner for $9.49 for a 70 ounce bottle and store sel
solmaris [256]

Answer:

Store C

Step-by-step explanation:

Simply divide the price by the amount to determine which store has the best price efficiency.

A : 12.99 / 100 = .129¢ per oz

B : 9.49 / 70 = .136¢ per oz

C: 10.98 / 90 = .122¢ per oz

Store C has the best price efficiency

3 0
3 years ago
Peyton spent $15.05 on 7 gallons of gas for her car. Jamal is buying the same gasoline,
blagie [28]

<em>15.05 ÷ 7 = $2.15 per gallon</em>

<em>--</em>

<em>2.15 x 4 = $8.60</em>

<em>--</em>

<em>jamal can buy 4 gallons of gas</em>

<em />

8 0
3 years ago
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