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3 years ago

If 5:x=9:3 then 9x=?

Mathematics

1 answer:

devlian [24]3 years ago

3 0

Answer:

9x=15, and x= 1.6 infinite

Step-by-step explanation:

5:x=9:3 is basically 5/x=9/3 if there is 9x, it is equal to 5*3, or 15.

It is 9x because they did cross multiplication

So do it to the other side

and the answer is 9x=15

<Hope it helped!> ~❤️

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Subtract 7x-9 from2x^2-11

strojnjashka [21]

Answer:

The answer is: $2x^2-7x-2$

Step-by-step explanation:

we are asked to subtract $7x-9$ from $2x^2-11$

so, $2x^2-11-(7x-9)\\=2x^2-11-7x+9\\=2x^2-7x-2$ .

Hence the desired result is: $2x^2-7x-2$ .

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A section of concrete pipe 30m long has an inside diameter of 1.2m and an outside diameter of 1.8m. what is the volume of concre

Fudgin [204]

length of pipe= 30m

Inside dia. = 1.2m

Outside dia. = 1.8m

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V= (pi)
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v= (3.3534-1.1304)30
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3 years ago

Plz need help on a quiz???

Likurg_2 [28]

The answer is letter A

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Write 7/14 • (-7/12) in lowest terms

Marizza181 [45]

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3 years ago

Calculate the area of the triangle with the following vertices (3, -7), (6, 4), (-2, -3)

Monica [59]

Answer:

$\boxed{\mathsf{A} \triangle = \red{\dfrac{67}{2}u.a}}$

Step-by-step explanation:

Let's follow up with the solution. Considering a triangle with the vertices $\mathsf{A(x_A, y_A)}$ , $\mathsf{B(x_B, y_B)}$ and $\mathsf{C(x_C, y_C)}$ , have a look at the representation in the cartesian plan.

From this representation we can say that the area (A) of a triangle through the knowledge of <u>analytical geometry</u> is given by the determinant of the vertices divided by two, mathematically,

$\mathsf{A} \triangle = \dfrac{\left| \begin{array}{ccc} \mathsf{x_A} & \mathsf{y_A }& 1 \\ \mathsf{x_B} & \mathsf{ y_B} & 1 \\ \mathsf{ x_C} & \mathsf{ y_C} & 1 \end{array} \right|}{2}$

So, applying this knowledge we're going to have,

$\mathsf{A} \triangle = \dfrac{\left| \begin{array}{ccc} 3 & -7 & 1 \\ 6 & 4 & 1 \\ -2 & -3 & 1 \end{array} \right|}{2}$

$\mathsf{A} \triangle = \dfrac{1}{2}\left[ \left.\begin{array}{ccc} 3 & -7 & 1 \\ 6 & 4 & 1 \\ -2& -3 & 1 \end{array} \right| \begin{array}{cc} 3 & -7 \\ 6 & 4 \\ -2 & -3 \end{array} \right]$

$\mathsf{A} \triangle = \dfrac{12 + 14 - 18 - (-8 - 9 - 42)}{2}$

$\red{\mathsf{A} \triangle = \dfrac{67}{2} = 33,5u.a}$

Hope you enjoy it, see ya!)

$\green{\mathsf{FROM}}:$ Mozambique, Maputo – Matola City – T-3

DavidJunior17

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3 years ago