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Ann [662]
3 years ago
9

In triangle ABC, DEAC. If AD=12, BD=3, and CE=10, find BE.

Mathematics
1 answer:
Darina [25.2K]3 years ago
7 0

Answer:

BE = 2.5

Step-by-step explanation:

Remark

Use triangles ABC and DEB.

Formula

AB/DB = BC / BE

Givens

  • AB = 15
  • BD = 3
  • BC = 10 + x
  • BE = x

Solution

15/3 = (10 + x)/x              Cross multiply

15x = 3(10 + x)                Remove the brackets

15x = 30 + 3x                 Subtract 3x from both sides.

15x - 3x = 30                  Combine

12x = 30                         Divide by 12

x = 30/12

x = 2.5

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Step-by-step explanation:

3 0
3 years ago
Factor the expression: -45x +40 expand the expression: 4w + 9( -6 - 3w)
AlekseyPX

Answer:

\large \boxed{\mathrm{view \ explanation}}

Step-by-step explanation:

-45x + 40

Factor out 5 from the expression.

5(-9x) + 5(8)

Take 5 as a common factor.

<u>5(-9x + 8)</u>

4w + 9( -6 - 3w)

Expand brackets.

4w + 9(-6) + 9(-3w)

4w - 54 - 27w

Combine like terms.

4w - 27w - 54

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5 0
3 years ago
Read 2 more answers
Help please I don’t understand
Phantasy [73]

The height of the object after 1 sec is 284 feet

<h3>Equation of height of an object</h3>

Given the equation of height of an object expressed as:

h(t) = -16t^2 + 300t

We are to find the height of the object after 1 sec. To do that, we will substitute t = 1 into the following expression

h(t) = -16t^2 + 300t

h(1) = -16(1)^2 + 300(1)

h(1) = -16 + 300

h(1) = 284ft

Hence the height of the object after 1 sec is 284 feet

Learn more on maximum height here: brainly.com/question/12446886

3 0
2 years ago
A(n) _____ is any side of a polygon that shares a side with only one angle of a pair of angles.
erastovalidia [21]

Answer:

non-included

Step-by-step explanation:

A non included side of a polygon shares a side with only one angle of a pair of angles.

4 0
3 years ago
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Can you guys please help!
yuradex [85]

Answer:

5 for the first and 4x for the second one also plz give heart

Step-by-step explanation:

i just know

4 0
3 years ago
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