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3 years ago

10

What is the mean of the set of numbers? {–8, –4, –3, –11}

1 answer:

Mkey [24]3 years ago

7 0

The answer is A. The mean is the average of the numbers. It is easy to calculate: add up all the numbers, then divide by how many numbers there are. In other words it is the sum divided by the count. -8+-4+-3+-11=-26 -26÷4=-6.5

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Evaluate the summation of 3 n plus 2, from n equals 1 to 14..

Ulleksa [173]

Summation of 3n + 2 from n = 1 to n = 14 = (3(1) + 2) + (3(2) + 2) + (3(3) + 2) + . . . + (3(14) + 2) = 5 + 8 + 11 + ... + 44 ia an arithmetic progression with first term (a) = 5, common difference (d) = 3 and last term (l) = 44 and n = 14
Sn = n/2(a + l) = 14/2(5 + 44) = 7(49) = 343

Therefore, the required summation is 343.

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3 years ago

Read 2 more answers

CAN SO ONE PLS HELP ME whats (2-3x4)9+22

Nuetrik [128]

Answer:

The answer is = 112

Step-by-step explanation:

3x4 = 12

12 - 2 = 10

10 x 9 = 90 .,. when there is a ) next to a number you multiply

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3 years ago

Solve the equation using square roots 2x^2=242

tia_tia [17]

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3 years ago

What is 91/22 in decimal?

Lemur [1.5K]

<span>4.13 (continues) is the answer</span>

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3 years ago

Which pair of words describes this system of equations 3y=9x-6 2y+6x=4

pishuonlain [190]

Answer:

Consistent and dependent

Step-by-step explanation:

Given

$3y = 9x - 6$

$2y + 6x = 4$

Required

The words that describe the equations

Make y the subject in (2)

$2y + 6x = 4$

Collect like terms

$2y = 4 - 6x$

Divide through by 2

$y = 2 - 3x$

Substitute: $y = 2 - 3x$ in (1)

$3y = 9x - 6$

$3(2 - 3x) = 9x - 6$

$6 - 9x = 9x - 6$

Collect like terms

$9x+9x = 6+6$

$18x = 12$

Solve for x

$x = \frac{12}{18}$

Simplify

$x = \frac{2}{3}$

Substitute $x = \frac{2}{3}$ in $y = 2 - 3x$

$y = 2 - 3*\frac{2}{3}$

$y = 2 - 2$

$y =0$

So, we have:

$x = \frac{2}{3}$ and $y =0$

<em>The system is consistent because it has at least 1 solution</em>

<em>The system is dependent because it has more than 1 solution</em>

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3 years ago