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4 years ago

Combine like terms. 3y+6+2y-3-6y^2+7y^2-4

Mathematics

1 answer:

Anna35 [415]4 years ago

8 0

Y^2+5y+10
To 2 Squared go together the regular y go together and then normal go together

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Determkne the mean of the given data

nika2105 [10]

Answer:

$\frac{1}{n}\sum_i x_i$

4 0

3 years ago

Please help me with question 19

Ksenya-84 [330]

Alright, lets get started.

Suppose the smaller integer = n

So, larger integer will be = n+2

3 times of larger integer will be = $3(n+2)$

smaller integer is added into this , so

$n +3 (n+2)$

The result is 2 less than 5 times of smaller integer, so

$5n - 2$

Both are equal so,

$n + 3 (n+2) = 5n - 2$

$n + 3n + 6 = 5n - 2$

Rafael makde the mistake that he didn't put the larger integer into parenthesis like (n+2) , so three times will be 3 n + 6 as he got 3n + 2

So, the correct equation is

$n +3n +6 = 5n - 2$

Solving the equation

$4n + 6 = 5n - 2$

$n = 8$

So, saller integer is 8 and larger integer is $8 + 2 = 10$

So, both integers are 8 and 10. : Answer

Hope it will help :)

8 0

3 years ago

Find the volume of this triangular pyramid.

natima [27]

Answer:

v = 340 cm³

Step-by-step explanation:

base area = 12 x 10 x 0.5 = 60 cm²

v = 60 x 17 x 1/3 = 340 cm³

3 0

3 years ago

The ages of a group of 135 randomly selected adult females have a standard deviation of 18.3 years. Assume that the ages of fema

NeTakaya

Answer:

Therefore, the number of female statistics student ages that must be obtained in order to estimate the mean age of all female statistics student is 3625 female statistics student

Step-by-step explanation:

Here, we have

$n = \left (\frac{(z_{\alpha/2}) (\sigma) }{E} \right )^{2}$

Where:

n = Required sample size

σ = Standard deviation = 18.3

E = Margin of error = 1/2 year

$z_{\alpha /2}$ = Critical score from the confidence level = 1.645

Therefore,

$n = \left (\frac{(1.645) (18.3) }{\frac{1}{2} } \right )^{2} = 3624.88$

Therefore, the number of female statistics student ages that must be obtained in order to estimate the mean age of all female statistics student = 3625 female statistics student.

3 0

3 years ago

Andell is 9 years older than Arnez. arnez is 3 years younger than Marianne. the sum of their ages is 24. what is the age of each

Harman [31]

Answer:

Arnez is 4. Andell is 13. Marianne is 7.

Step-by-step explanation:

Let x represent Arnez's age. If we write out an equation, we end up with this:

24 = (9 + x) + (x + 3) + x

24 = 9 + x + x + 3 + x

24 = (x + x + x) + (9 + 3)

24 = 3x + 12

24 - 12 = 3x + 12 - 12

12 / 3 = 3x / 3

4 = x

5 0

3 years ago