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3 years ago

Multiply and simplify: 3a(4a2 – 5a + 12)

Mathematics

1 answer:

DochEvi [55]3 years ago

3 0

3a(4a²-5a+12)

12a³-15a²+36a

~Hope this helped!~

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Susan makes purple paint by mixing red and blue paint in the ratio 2:3

viktelen [127]

25ml — you add up the two numbers in the ratio, and that makes 5 (2+3), you then need to make sure that your answer is a multiple of 5 while being in the ratio 2:3. You then add up the 2 colours of paint

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2 years ago

A stack of books is 24 inches high.

JulsSmile [24]

Answer:

Step-by-step explanation:

Let's say n such books make up the stack.

If each book is 3/4 inch thick, it contributes 3/4 to the total height of the stack – 24 inches.

==> number of books × 3/4 = 24

(to get this result add the heights of n such book, and equate it to 24. You'll get something like:

3/4 + 3/4 +. . . . n times = 24

And that's what's meant by 3/4 × n = 24)

==> n × 3/4 = 24

multiply both sides by 4

==> n × 3 = 24 × 4

divide both sides by 3

==> n = (24 × 4)/3

==> n = 8 × 4

==> n = 32

We assumed the number of books to be n.

so the answer is:

32 books, each if height 3/4 inch, are required to build a stack 24 inches high.

4 0

3 years ago

3x18 = 3 (10+8) is an example of the _________ property of multiplication.

Mariulka [41]

Answer:

3x18 = 3 (10+8) is an example of the commutative property of multiplication

Step-by-step explanation:

3 0

4 years ago

Lucy is going to the grocery store. She will buy 5 items. Every item she will buy is $2. Afterward, she will buy herself a milk

Dima020 [189]

Answer:

13 dollars

Step-by-step explanation:

5 x 2= 10+3=13

3 0

4 years ago

Which of the following shows the answer to the problem 3/13 x 5/21 = _____ in its simplest form?

Nikolay [14]

$\frac{3}{13} * \frac{5}{21}$
=

8 0

4 years ago