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nikitadnepr [17]
4 years ago
10

Please help if you can.

Mathematics
2 answers:
PIT_PIT [208]4 years ago
6 0

Answer:

It’s 5 feet wide

Step-by-step explanation:

Hope I helped you!

Please mark me as brainliest!

Nobody has yet :(

katen-ka-za [31]4 years ago
4 0

Answer:

Step-by-step explanation:

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Mai has picked 1 cup of strawberries for a cake, which is enough for ¾ of the cake. How many cups does she need for the whole ca
Kitty [74]

Answer:

1 1/4 cups

Step-by-step explanation:

1 cup= 3/4 of a cake

1 1/4= 1 whole cake

I hope this is what you're looking for.

8 0
3 years ago
Which expression is equivalent to *picture attached*
DiKsa [7]

Answer:

The correct option is;

4 \left (\dfrac{50 (50+1) (2\times 50+1)}{6} \right ) +3  \left (\dfrac{50(51) }{2} \right )

Step-by-step explanation:

The given expression is presented as follows;

\sum\limits _{n = 1}^{50}n\times \left (4\cdot n + 3  \right )

Which can be expanded into the following form;

\sum\limits _{n = 1}^{50} \left (4\cdot n^2 + 3  \cdot n\right ) = 4 \times \sum\limits _{n = 1}^{50} \left  n^2 + 3  \times\sum\limits _{n = 1}^{50}  n

From which we have;

\sum\limits _{k = 1}^{n} \left  k^2 = \dfrac{n \times (n+1) \times(2n+1)}{6}

\sum\limits _{k = 1}^{n} \left  k = \dfrac{n \times (n+1) }{2}

Therefore, substituting the value of n = 50 we have;

\sum\limits _{n = 1}^{50} \left  k^2 = \dfrac{50 \times (50+1) \times(2\cdot 50+1)}{6}

\sum\limits _{k = 1}^{50} \left  k = \dfrac{50 \times (50+1) }{2}

Which gives;

4 \times \sum\limits _{n = 1}^{50} \left  n^2 =  4 \times \dfrac{n \times (n+1) \times(2n+1)}{6} = 4 \times \dfrac{50 \times (50+1) \times(2 \times 50+1)}{6}

3  \times\sum\limits _{n = 1}^{50}  n = 3  \times \dfrac{n \times (n+1) }{2} = 3  \times \dfrac{50 \times (51) }{2}

\sum\limits _{n = 1}^{50}n\times \left (4\cdot n + 3  \right ) = 4 \times \dfrac{50 \times (50+1) \times(2\times 50+1)}{6} +3  \times \dfrac{50 \times (51) }{2}

Therefore, we have;

4 \left (\dfrac{50 (50+1) (2\times 50+1)}{6} \right ) +3  \left (\dfrac{50(51) }{2} \right ).

4 0
3 years ago
Perform the operation.<br> (4x^2+9x-7)-(-7x^2+5x-1)
viva [34]

(4 {x}^{2}  + 9x - 7) - ( - 7 {x}^{2}  + 5x - 1) \\  = (11 {x}^{2}  + 4x - 6)

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I don’t know sorry, i wanna help u
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