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2 years ago

Three students spent $12 on school lunch. At that rate, find the amount 10 students would spend on the same school lunch.

Mathematics

2 answers:

Naddika [18.5K]2 years ago

7 0

12 divided by 3 is 4. the answer would be 40 as 4x10 is equal to 40

zhannawk [14.2K]2 years ago

4 0

4x10 basically so it would be 40 dollars!

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A woman has 7 keys. only one of them will open her door. when seh arrives at the door there is no sufficient light for her to fi

Gala2k [10]

Since she has seven key the probability that the first one will open the door is
$\frac{1}{7}$
if it takes three attempts to open the door,the probability is
$\frac{1}{3}$
if the three attempts would not work
then the probability that the fourth attempt will open the door is
$\frac{1}{4}$
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7 0

3 years ago

Two cards are selected from a standard deck of 52 playing cards. the first is replaced before the second card is selected. find

Iteru [2.4K]

The correct answer is
 Find the probability of selecting a diamond and then selecting a queen.

standard deck of 52 playing cards

hearts: 2, 3, 4, 5, 6, 7, 8, 9, 10, j, q, k, A---- > 13 cards

clubs: 2, 3, 4, 5, 6, 7, 8, 9, 10, j, q, k, A---- > 13 cards

spades: 2, 3, 4, 5, 6, 7, 8, 9, 10, j, q, k, A---- > 13 cards

diamonds: 2, 3, 4, 5, 6, 7, 8, 9, 10, j, q, k, A---- > 13 cards

a) The probability of selecting a diamond is 13/52

b) The probability of selecting a queen is 4/52

c) The probability of selecting a diamond and then selecting a queen is

(13/52)*(4/52)=0.0192------------->1.92%

6 0

3 years ago

HELP I NEED HELP ASAP

tatiyna

Answer:

D) 8x²-172x+120

Step-by-step explanation:

Length=2(-2x+20)+6

Width=-2x+20

(-4x+40+6)(-2x+20)

(-4x+46)(-2x+20)

8x²-80x-92x+920

8x²-172x+920

5 0

2 years ago

Plz help me I’m not good at math

grigory [225]

Answer:

second one

Step-by-step explanation:

am pretty sure

6 0

3 years ago

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The area of a rectangle is 14 square units. It has side lengths xxx and yyy. Given each value for xxx, find yyy.

Korolek [52]

Answer:

does not make sense

Step-by-step explanation:

7 0

3 years ago

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