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3 years ago

Gretchen computed the geometric mean of two numbers. One of the

Mathematics

1 answer:

alina1380 [7]3 years ago

6 0

9514 1404 393

Answer:

Step-by-step explanation:

When the mean of two numbers is the same as one of the numbers, then the other number also has that same value. This is true for any kind of mean:

arithmetic, geometric, harmonic.

The other number would be 7.

The geometric mean (m) of a and b is ...

m = √(ab)

We have ...

7 = √(7b)

49 = 7b . . . . . square both sides

7 = b . . . . . . . .divide by 7

a = b = m = 7 in this case.

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The temperature falls from 10°F to -15° F. What is the difference in these<br> temperatures?

nadya68 [22]

Answer:

the difference is 25

Step-by-step explanation:

to get from 10 to 0 is 10 units and from 0 to -15 is 15

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3 years ago

The sum of 3 consecutive even numbers is 132

pantera1 [17]

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4 years ago

If LN = 6x – 5, LM = x + 7, and MN = 3x + 20, find MN.

nikklg [1K]

Answer:

LM = LN + MN [ assuming N is a point between L and M ]

$(x + 7) = (6x - 5) + (3x + 20) \\ x + 7 = 9x + 15 \\ 8x = - 8 \\ { \underline{x = - 1}}$

then find MN:

$MN = 3x + 20 \\ MN = 3( - 1) + 20 = - 3 + 20\\ { \boxed{ \boxed{MN = 17}}}$

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3 years ago

What is the distance between points (-4, 5) and (8, 40) on the coordinate plane?

Zolol [24]

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3 years ago

Item 20 You pay $4.35 for 0.75 pound of American cheese. You buy 2.5 pounds of Swiss cheese for $7.98 per pound. a. How much les

Alexus [3.1K]

Answer:

a. $2.18

b. $15.60

Step-by-step explanation:

a. Price per pound of American cheese = $4.35 / 0.75 = $5.8

Price per pound of Swiss cheese = $7.98

Difference in price per pound = $7.98 - $5.8 = $2.18

b. Total amount spent on swiss cheese = $7.98 x 2.5 = $19.95

Amount spent more on Swiss cheese than on American cheese = $19,95 - $4.35 = $15.60

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3 years ago