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3 years ago

Insert three arithmetic means between 25 and 9

Mathematics

1 answer:

Aleonysh [2.5K]3 years ago

6 0

Answer:

21, 17, 13

Step-by-step explanation:

Find the mean of the 2 given values

mean = $\frac{25+9}{2}$ = $\frac{34}{2}$ = 17

Noe find the mean of 25 and 17 and 17 and 9

mean = $\frac{25+17}{2}$ = $\frac{42}{2}$ = 21 and

mean = $\frac{17+9}{2}$ = $\frac{26}{2}$ = 13

Thus the 3 means are 21, 17 and 13, that is

25, 21, 17, 13, 9

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Solve the following system of equations by substitution and select the correct answer below:

yarga [219]

X=(24+4y)/2

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4y=12
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2x-4x3=24
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x=18

Correct answer: A

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3 years ago

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jim pays $75 pqe minth for a phone plan plus an additional 0.30 per minute. write an expression representing the cost per month

almond37 [142]

Answer:

Step-by-step explanation:

y = cost

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3 years ago

To determine the inverse of function f,

lisabon 2012 [21]

Answer:

To determine the inverse of function f, change f(x) to y, switch x and y, and solve for y.

$\frac{1}{8} (x-4)^3$

Step-by-step explanation:

f(x) = $\sqrt[3]{8x} +4$

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3 years ago

A pizza shop delivered 17 pepperoni pizzas to a college on the first night of final exams. The total cost of the pizzas was &amp

Allushta [10]

Answer:

Step-by-step explanation:

Let x = number of small pizzas

Let y = number of medium pizzas

Let z = number of large pizzas

Total weight of pizza = 9 *16 +8 = 152

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x + y + z = 17 - equation 1

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3x + 9y + 14z = 152 - equation 3

from equation 1, x = 17 -y -z - equation *

substitute in both 2 and 3

4(17 -y -z) + 6y + 15z = 153 ---- 1

3(17 -y -z) +9y +14z = 152 --- 2

68 - 4y - 4z +6y + 15z = 153 ----i

51 - 3y - 3z + 9y + 14z = 152 ---ii

2y + 11z = 85 ---1

6y +11z = 101 ----2

equation 2 minus equation 1

4y = 16 => y = 4

substitute y in equation 1

8 + 11z = 85 => 11z = 77 => z = 7

subtitute y as 4 and z as 7 in equation *

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4 years ago

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4 years ago

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Insert three arithmetic means between 25 and 9​

Insert three arithmetic means between 25 and 9