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3 years ago

Multiply (1/2) (-1/4) Which of the following is correct?

Mathematics

2 answers:

Anna35 [415]3 years ago

7 0

Answer:

Hey there! your answer should be the first choice, -1/8

Step-by-step explanation:

multiplication and division in fraction are way easier than adding and subtracting them since you don't have to use factoring much.

so first you set them aside $(\frac{1}{2} )(\frac{-1}{4})$

then, literally just multiply them across.

meaning, top times top a.k.a. the numerator and bottom times bottom a.k.a. the denominator

check this little cheat code

positive x positive = positive

negative x negative = positive

positive x negative = negative

negative x positive = negative

so lets do the top, the numerators first: 1 x (-1) = -1

then the bottom, the denominators next: 2 x 4 = 8

now replace your answer with that and you get $\frac{-1}{8}$ which leads you with the first answer choice.

I hope this helps! :)

Andrej [43]3 years ago

4 0

Answer: the answer is A

Step-by-step explanation:

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What is the inter-quartile range of the given data set? <br>a. 2<br>b. 3<br>c. 6

babunello [35]

Answer:

b. 3

Step-by-step explanation:

20-17=3

5 0

3 years ago

Cross product property

Klio2033 [76]

Using the cross product property on this proportion gives us the following equation:

20 (2x - 9) = 10 (9)

Use the distributive property and multiply

40x - 180 = 90

Add 180 to both sides

40x = 270

Divide 40 from both sides

x = 270/40

Simplify fraction

x = 27/4

This should be your answer. Let me know if you need any clarifications, thanks!

8 0

3 years ago

A dentist polls his patients and finds that 83 percent brush their teeth at least twice a day, 47 percent floss daily, and 19 pe

puteri [66]

Answer:

The correct option is B. 23%

Step-by-step explanation:

Let the event that patient brushes his teeth at least twice a day is denoted by A

So, P(A) = 0.83

Let the event that patient flosses daily is denoted by B

So, P(B) = 0.47

Now, it is given that 19 percent patients brush at least twice a day and floss daily.

⇒ P(A and B) = 0.19

Now, we need to find conditional probability of occurring event B given A has occurred.

$\implies P(B|A) =\frac{P(A\: and\: B)}{P(A)}\\\\\implies P(B|A) = \frac{0.19}{0.83}\\\\\implies P(B|A) = 0.2289\approx 0.23$

Hence, Nearest required percentage = 23%

Therefore, The correct option is B. 23%

4 0

3 years ago

Read 2 more answers

Find cube root of 175616 ??

Tpy6a [65]

Answer:

Step-by-step explanation:

Cube root of 175616 by prime factorization method is 56

Solution:

To find cube root of 175616 by prime factorization method

A number that must be multiplied by itself three times to equal a given number is called cube root

Prime factorization method:

Prime factorization is a number written as the product of all its prime factors.

In order of finding cube root by prime factorization we use the following steps:

Step I : Obtain the given number

Step II : Resolve it into prime factors.

Step III : Group the factors in 3 in such a way that each number of the group is same

Step IV : Take one factor from each group

Step V : Find the product of the factors obtained in step IV. This product is the required cube root

Prime factorization of 175616:

\text{ prime factors of 175616 } = 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 7 \times 7 \times 7 prime factors of 175616 =2×2×2×2×2×2×2×2×2×7×7×7

Thus we get,

\sqrt[3]{175616} = \sqrt[3]{2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 7 \times 7 \times 7}

175616

2×2×2×2×2×2×2×2×2×7×7×7

Make the groups of 3 of equal numbers

\sqrt[3]{175616} = \sqrt[3]{2 \times 2 \times 2} \times \sqrt[3]{2 \times 2 \times 2 \times } \times \sqrt[3]{2 \times 2 \times 2} \times \sqrt[3]{7 \times 7 \times 7}

175616

2×2×2

2×2×2×

2×2×2

7×7×7

So there are 4 equal groups. So from that group take one factor out

\sqrt[3]{175616} = 2 \times 2 \times 2 \times 7 = 56

175616

=2×2×2×7=56

Thus Cube root of 175616 by prime factorization method is 56

please mark me as a brainlist

3 0

3 years ago

9/x=32/56 <br> Solve for z

lions [1.4K]

Answer:

x = 15.75

Step-by-step explanation:

I'm going to assume you mean solve for x so:

$\frac{9}{x} =\frac{32}{56} \\\\32x=504\\x=15.75$

6 0

3 years ago

Multiply (1/2) (-1/4) Which of the following is correct?​

Multiply (1/2) (-1/4) Which of the following is correct?