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3 years ago

4x + 2(x - 5) - 3(2x -4)

Mathematics

1 answer:

Olegator [25]3 years ago

5 0

Answer:

Step-by-step explanation:

Pull out like factors :

2x - 4 = 2 • (x - 2)

(4x + (2 • (x - 5))) - 6 • (x - 2)

(4x + 2 • (x - 5)) - 6 • (x - 2)

Final Answer:

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Please help I will give 10 points answer both questions

seropon [69]

Question 4:
18(A)+7(S)+10(G)=35 lollipops
35/10=3.5
35/18=1.99(repeating)
35/7=5

I hope that helps in some way. <span />

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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

The school choir is going on a field trip to see an opera. There are 34 students and 5 teachers going on the trip. If each ticke

Effectus [21]

Answer:

They have to raise $370.5

Step-by-step explanation:

You add 34 and 5. Then you multiple 39 and 9,50 to get your answer.

7 0

3 years ago

It’s a Class of 24 students,5/6 are boys.<br> How many boys are in the class?

Hoochie [10]

Answer:

son 14

Step-by-step explanation:

por que solo se resta para saber el numero de niños

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2 years ago

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MatroZZZ [7]

BT=TD
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AB=16

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3 years ago