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3 years ago

9

mrs jackson has $90.She spends 1/4 pf her money on food 1/2 of the remainder on clothes and she saves the rest. How many does sh

e save?

1 answer:

rodikova [14]3 years ago

7 0

First you want to divide $90 by four. You want to take the answer and divide it by 2.

$90 / 4 = $22.5

22.5 / 2 = Mrs. Jackson saved $11.25.

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A mouse climbs up a well of 86 meters. It advances 14 meters during the night, but during the day it retreats 2. The mouse will

Deffense [45]

Step-by-step explanation:

we assume day and night are equally long.

and the mouse will start at night of day 1.

then, on day 2, it will first retreat 2 meters (during daylight) and then advance 14 meters (at night).

so, on every full day, the mouse will effectively advance 12 meters (-2 + 14 = 12).

with a starting value of 14 (the first night).

so, we are getting an arithmetic sequence

an = an-1 + c

c = 12 in our case.

a1 = 14

a2 = a1 + 12 = 14+12 = 26

a3 = a2 + 12 = a1 + 12 + 12 = 14 + 2×12 = 38

an = a1 + (n-1)×12 = 14 + 12(n-1)

at what n will it reach 86 ?

86 = 14 + 12(n-1) = 14 + 12n - 12 = 2 + 12n

84 = 12n

n = 7

so, on the 7th day the mouse will reach the surface (if we truly count the first starting night day 1 - this is up to your teacher, but I would).

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2 years ago

Last year ,Chesa made 32 one-cup servings of soup for a school party . This year, she will make two times the amount of the soup

Gnoma [55]

Answer:

Chesa will make 4 gallons of soup this year.

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If you multiply 32 times 2 you will get 64. You then find out how many cups are in a gallon. If 16 cups are in a gallon, you then divide 64 by 16. Your answer should be 4.

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3 years ago

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Otrada [13]

(1) p x q = 1575
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divide 1 by 2 to eliminate p:
q^2 = 1575 / (9/2)
q^2 = 350
q = sqrt(350)

Substitue q in either 1 or 2 to find p.

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IRISSAK [1]

Given a right angle triangle

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Rounding to the nearest tenth

So, the answer is the length of the third side = 8.1

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1 year ago

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vovikov84 [41]

Answer:

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2 years ago