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2 years ago

The children in a school were asked how many cats and dogs

Mathematics

2 answers:

andriy [413]2 years ago

8 0

They would have 100 dogs!

vlabodo [156]2 years ago

8 0

Answer:

90 cats 60 dogs

Step-by-step explanation:

3x +2x = 150

5x = 150

x = 30

3(30) + 2(30) = 150

90 + 60 = 150

3/2 = 1.5

90/60=1.5

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4 Which of the following is a composite number between 80 ard 100?

Firlakuza [10]

Answer: 90

90 is a composite number because:

4 x 15 = 90

10 x 9 = 90

A composite number has more than two factors.

Hope this helps!

8 0

2 years ago

A multiple choice test has four possible answers for each question. Let X be the number of correct responses in a test of 100 qu

dimulka [17.4K]

Answer:

a. 4.33.

Step-by-step explanation:

If there is only one correct answer out of four alternatives, the expected proportion of correct answers is p =0.25

Sample size (n) = 100 questions

The standard deviation of a proportion 'p' is given by:

$s=\sqrt{\frac{p*(1-p)}{n} }$

Applying the given data:

$s=\sqrt{\frac{0.25*(1-0.25)}{100}}\\s=0.0433$

If X is the number of correct responses in 100 guesses, the standard deviation of X is:

$\sigma = n*s=100*0.0433\\\sigma = 4.33$

The standard deviation of X is 4.33 questions.

7 0

2 years ago

A boat leaves a.M. Marina at 7 AM traveling at 3.4 knots bearing is N38°E the boat docks on an island at 2pm how far north of th

Jlenok [28]

Answer:

The distance between the docks & island is 44.07 km.

Step-by-step explanation:

Speed of the boat S = 3.4 knot = 6.3 $\frac{km}{hr}$

Time taken by bot to reach the island = 7 hr

We know that the distance is given by

Distance = Speed × Time

Put all the values in above equation we get

D = 6.3 × 7

D = 44.07 km

Therefore the distance between the docks & island is 44.07 km.

6 0

2 years ago

1 1/3 x 5/8 A.3/4 B.4/5 C.5/6 D.5/8

Dmitriy789 [7]

The answer is 5/6, hope this helps

5 0

2 years ago

Read 2 more answers

Dan read 4 1/6 books. omar read 1 5/6 books. how many more books did dan read than omar?

DedPeter [7]

What you have to do first is put them both into improper fractions first. 4 1/6 would be 4 time 6 plus 1 which equals 25/6. Next 1 5/6 would be 1 times 6 plus 5 which equals 11/6. Next what you have to do is subtract 25-6 which equals 19. Next you put 19/6. Two ways to answer is to leave it improper or as a mix number. Answer for improper fraction is 19/6. The other way for a mix number is 3 1/6.

7 0

2 years ago

Read 2 more answers