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2 years ago

Help plz im so confused

Mathematics

2 answers:

aleksklad [387]2 years ago

5 0

2 hope this helps:) sorry if I’m wrong!

Elenna [48]2 years ago

4 0

Answer:

ab/(ab+3)=9/13

13ab=27+9ab

13ab-9ab=27

4ab=27

ab=27/4

ab=6.75

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A new movie is released each year for 8 years to go along with a popular book series. Each movie is 5 minutes longer than the la

Georgia [21]

Answer:

The total length of all 8 movies is 740 minutes

Step-by-step explanation:

* Lets revise the arithmetic series

- In the arithmetic series there is a constant difference between

each two consecutive numbers

- Ex:

# 2 , 5 , 8 , 11 , ………………………. (constant difference is 3)

# 5 , 10 , 15 , 20 , ………………………… (constant difference is 5)

# 12 , 10 , 8 , 6 , …………………………… (constant difference is -2)

* General term (nth term) of an Arithmetic series:

- If the first term is a and the common diffidence is d, then

U1 = a , U2 = a + d , U3 = a + 2d , U4 = a + 3d , U5 = a + 4d

So the nth term is Un = a + (n – 1)d, where n is the position of the

number in the series

- The formula to find the sum of n terms is

Sn = n/2 [a + l] , where l is the last term in the series

* Lets solve the problem

- A new movie is released each year for 8 years to go along with a

popular book series

∴ n = 8

- Each movie is 5 minutes longer than the last

∴ d = 5

- The first movie is 75 minutes long

∴ a = 75

- To find the total length of all 8 movies find the sum of the 8 terms

∵ Un = a + (n - 1)d

∵ The last term l is u8

∵ a = 75 , d = 5 , n = 8

∴ l = 75 + (8 - 1)(5) = 75 + 7(5) = 75 + 35 = 110

∴ l = 110

∵ Sn = n/2 [a + l]

∴ S8 = 8/2 [75 + 110] = 4 [185] = 740 minutes

* The total length of all 8 movies is 740 minutes

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2 years ago

A shopkeeper bought 775 kg of wheat . He wants to divide all the wheat into 8 bags of the same size. How much Wheat Can he store

Arturiano [62]

In order to calculate how much wheat will be stored in each bag, let's divide the total amount of wheat by the number of bags:

$\frac{775}{8}=96.875$

Assuming that the amount of wheat each bag can hold is a whole number, so each bag can hold 96 kg (otherwise, each bag would hold 96.875 kg and there would be no wheat left).

Then, to find how much wheat will be left, let's calculate how much the 8 bags will hold, and then we subtract this value from the total:

$\begin{gathered} 96\cdot8=768 \\ \\ 775-768=7 \end{gathered}$

So there will be 7 kg left.

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1 year ago

Hayley begins solving this problem by combining like terms. 3x + 5x = 10 Which problem requires the same strategy (combining lik

Tamiku [17]

D) 3x - 2x = 10 is the answer to this equation

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3 years ago

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ANEK [815]

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2 years ago

Question in the photo<br> Pls help

ra1l [238]

Answer:

F = $\frac{9C+160}{5}$

Step-by-step explanation:

Given

C = $\frac{5(F-32)}{9}$ ( multiply both sides by 9 to clear the fraction )

9C = 5(F - 32) ← distribute

9C = 5F - 160 ( add 160 to both sides )

9C + 160 = 5F ( divide both sides by 5 )

$\frac{9C+160}{5}$ = F

4 0

2 years ago