2 years ago

Write the missing number 1/5 out of 15

Mathematics

1 answer:

Sedbober [7]2 years ago

5 0

Answer:

Step-by-step explanation:

1/5 × 15

= 15/5

= 3 (would love if you could mark me the brainliest :))

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What is the length of a diagonal cube with a side length of 10cm?

Blizzard [7]

Answer:

Step-by-step explanation:

diagonal= $\sqrt{10^2+10^2}$

diagonal= $\sqrt{200}$

diagonal=14.1421356

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3 years ago

I need help I am trying to find ft

Rus_ich [418]

1 foot = 12 inches

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3 years ago

Number 12 please help! Thanks!

almond37 [142]

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3 years ago

What is the area of a triangle with vertices (3,0) (9,0) (7,6)

Nezavi [6.7K]

Answer:

The area of the triangle is of 21 units of area.

Step-by-step explanation:

The area of a triangle with three vertices $(x_1,y_1),(x_2,y_2),(x_3,y_3)$ is given by the determinant of the following matrix:

$A = \pm 0.5 \left|\begin{array}{ccc}x_1&y_1&1\\x_2&y_2&1\\1_3&y_3&1\end{array}\right|$

In this question:

Vertices (3,0) (9,0) (7,6). So

$A = \pm 0.5 \left|\begin{array}{ccc}3&0&1\\9&0&1\\7&7&1\end{array}\right|$

$A = \pm 0.5(3*0*1+0*1*7+1*9*7-0*7*1-0*9*1-3*1*7)$

$A = \pm 0.5*(63-21)$

$A = \pm 0.5*42 = 21$

The area of the triangle is of 21 units of area.

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2 years ago

Which system of linear equations appears to have a solution of (–1, 4)? On a coordinate plane, 2 lines intersect at (1, negative

madam [21]

Answer:

On coordinate plane, 2 lines intersect at (negative 1, 4)

Step-by-step explanation:

negative 1 = -1, 4 = 4

therefore this means that this coordinate is also (-1, 4)

6 0

3 years ago

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