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3 years ago

How to solve ((-9)×(-5)-9)÷(-12)

Mathematics

1 answer:

andreyandreev [35.5K]3 years ago

3 0

Answer:

-3

Step-by-step explanation:

Simplify the following:

(-9 (-5) - 9)/(-12)

-9 (-5) = 45:

(45 - 9)/(-12)

| 3 | 15

| 4 | 5

- | | 9

| 3 | 6:

36/(-12)

The gcd of 36 and -12 is 12, so 36/(-12) = (12×3)/(12 (-1)) = 12/12×3/(-1) = 3/(-1):

3/(-1)

Multiply numerator and denominator of 3/(-1) by -1:

Answer: -3

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3 years ago

Read 2 more answers

3. Which expression is equivalent to the expression shown below?

chubhunter [2.5K]

Answer:

option a

Step-by-step explanation:

we have:

7/2x-3(5x-1/2)

apply distributive property we have:

7/2x-3*5x-3*(-1/2)

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4 years ago

2. Vectors u and v are given by: u=5i-4j+ pk v=2i+tj-3k (a) Express p in terms of t when u and v are perpendicular.

Sindrei [870]

If u and v are perpendicular, then their dot product is zero:

$\vec u \cdot \vec v = (5\,\vec\imath-4\,\vec\jmath+p\,\vec k) \cdot (2\,\vec\imath+t\,\vec\jmath - 3\,\vec k) = 10 - 4t - 3p = 0$

Solve for p :

$10 - 4t - 3p = 0$

$3p = 10 - 4t$

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2 years ago

15x-3(3x+4)=6 what is x equal to, IDRC about the work as long as the answer is there

Alexxx [7]

Answer:

x = 3

Step-by-step explanation:

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3 years ago

Markuo's window store made a mosaic for the community center. The mosaic had a 7 × 7 array of different color square tiles. If e

djverab [1.8K]

The correct value of the length of each square tile is 3½ feet long.

Answer:

Total area of mosaic = 600.25 sq.ft

Step-by-step explanation:

We are told the length of each square tile = 3½ ft.

Area of square = L²

Where L is length of side.

Thus;

Area = 3½ × 3½

Area = 49/4 sq.ft

Now, an array of 7 x 7 means 7 rows and 7 columns

Thus, total number of square tiles = 7 x 7 = 49 tiles

So,

total area of whole mosaic = number of tiles × Area of 1 tile

Total area = 49 × 49/4 = 600.25 sq.ft

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3 years ago