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strojnjashka [21]
3 years ago
15

Which statement is true or false

Mathematics
1 answer:
Leto [7]3 years ago
4 0
1) True
2) False 
3) True 
4) False
You might be interested in
A bag contains 15 marbles. The probability of randomly selecting a green marble is 1/5. The probability of randomly selecting a
slava [35]

Answer:

6 blue marbles

Step-by-step explanation:

Given;

Total number of marbles N = 15

probability of randomly selecting a green marble

P(G) = 1/5

The probability of randomly selecting a green marble, replacing it, and then randomly selecting a blue marble P(G∩B) = 2/25

P(G∩B) = P(G) × P(B)

P(B) = P(G∩B) ÷ P(G)

The probability of selecting a blue marble

P(B) = 2/25 ÷ 1/5 = 2/5

The number of blue marbles N(B) = P(B) × N

N(B) = 2/5 × 15 = 6

There are 6 blue marbles

7 0
3 years ago
!!ASAP!! Please help marking brainliest w/ points!!
blondinia [14]

Answer:

1. yes

2. no

3. yes

4. yes

5. no

Step-by-step explanation:

5 0
3 years ago
Find the product using model or drawing
antiseptic1488 [7]

Fraction multiplication involves multiplying the numerators and the denominators to get the numerator and the denominator of the product respectively

Please find the attached diagrams

1. \dfrac{2}{15}, 2. \dfrac{3}{8}, 3. \dfrac{1}{12}, 4. \dfrac{7}{21}, 5. \dfrac{3}{10}

6. 51, 7. 1, 8. 22, 9. \dfrac{36}{55}, 10. 5\dfrac{1}{3}

Reasons:

The process of multiplication of factors using a model includes;

  • Creating a table that have the number of rows and columns equal to the values in the denominator of the two fractions respectively
  • Shading the number of columns given by the numerator of the fraction that has a denominator equal to the number of columns in the table
  • Shading the number of rows given by the numerator of the  fraction that has a denominator equal to the number of rows in the table
  • Ensuring that the common area are shaded to a different color
  • Simplifying the result

1. \dfrac{2}{3}   \times \dfrac{1}{5} = \dfrac{2}{15}  

2. \dfrac{1}{2}   \times \dfrac{3}{4} = \dfrac{3}{8}

3. \dfrac{1}{4}   \times \dfrac{2}{6} = \dfrac{2}{24} = \dfrac{1}{12}

4. \dfrac{1}{7}   \times \dfrac{2}{3} = \dfrac{7}{21}

5. \dfrac{4}{8}   \times \dfrac{3}{5} = \dfrac{12}{40} = \dfrac{3}{10}

Second part

6. When calculating fractions, 'of' means to 'multiply by', therefore, we have;

\dfrac{17}{25}   \times 75= \dfrac{17}{25}   \times 25 \times 3 = 17 \times 3 =  51

7. \dfrac{7}{6}   \times \dfrac{24}{28} = \dfrac{7}{6}   \times \dfrac{6 \times 4}{7 \times 4} = \dfrac{7}{6}   \times \dfrac{6}{7 }  = 1

8. 12   \times 1\dfrac{5}{6} =6 \times 2   \times \dfrac{11}{6} =2   \times {11} = 22

9. \dfrac{4}{5}   \times \dfrac{9}{11} = \dfrac{4 \times 9}{5 \times 11} = \dfrac{36}{55}

10. 6\dfrac{2}{3}     \times \dfrac{12}{15} =\dfrac{20}{3}  \times \dfrac{12}{15} = \dfrac{4 \times 5}{3}  \times \dfrac{4 \times 3}{5 \times 3} = \dfrac{4}{3}  \times {4} = \dfrac{16}{3} = 5\dfrac{1}{3}

Learn more here:

brainly.com/question/2752457

7 0
3 years ago
Can someone please help me with these 2 problems? I’m confused
saveliy_v [14]

Answer:

7) \dfrac{25c^2}{d^4}

8) 4w^6r

Step-by-step explanation:

You must use the laws of exponents.

7)

(\dfrac{5c}{d^2})^2 =

When you raise a fraction to an exponent, raise the numerator and the denominator to that exponent.

= \dfrac{(5c)^2}{(d^2)^2}

When you raise a product to an exponent, raise each factor to that exponent.

When you raise an exponent to an exponent, multiply the exponents.

= \dfrac{5^2c^2}{d^4}

= \dfrac{25c^2}{d^4}

8)

\dfrac{-16w^7r^2}{-4wr} =

To divide powers with the same base, subtract the exponents. Remember that a plain variable, such as w is the same as w^1.

=\dfrac{-16}{-4}w^{7-1}r^{2-1}

= 4w^6r

8 0
3 years ago
What are friends and why don't I have any.
Assoli18 [71]

Answer:

friends are ppl that will be there for u and love u and idk y u doint have any friends

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
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