All categories

3 years ago

NEED THE ANSWER ASAP PLEASE

Mathematics

2 answers:

Black_prince [1.1K]3 years ago

7 0

Answer:

AB = 5

Step-by-step explanation:

Because it is an isosceles triangle, we can say that AB equals BC, so we can form an equation.

AB = BC

3x - 4 = 5x - 10

→ Minus 5x from both sides to get the 'x' on one side

-2x - 4 = -10

→ Add -4 to both sides to isolate -2x

-2x = -6

→ Divide both sides by -2 to isolate x

x = 3

Now we know that x = 3, we can put it in to the length of AB

3 × 3 - 4 = 9 - 4 = 5

Firdavs [7]3 years ago

5 0

Answer:

AB = 5

Step-by-step explanation:

Since the triangle is isosceles then the legs are congruent, that is

BC = BA, substitute values

5x - 10 = 3x - 4 ( subtract 3x from both sides )

2x - 10 = - 4 ( add 10 to both sides )

2x = 6 ( divide both sides by 2 )

x = 3

Thus

AB = 3x - 4 = 3(3) - 4 = 9 - 4 = 5

You might be interested in

A safety regulation states that the maximum angle of elevation for a rescue ladder is 72°. A fire department's longest ladder is

Julli [10]

Answer:

The maximum safe rescue height is 104.6 feet above the height of the ground.

Step-by-step explanation:

Consider a triangle ABC where C is the point where the rescue ladder is standing and AB be the building and Ladder making an angle of 72° as shown.

We have to find the height of the building.

Let x be the height of building

Using Trigonometric ratio,

$\sin C=\frac{\text{Perpendicular}}{\text{Hypotenuse}}$

$\sin 72^{\circ}=\frac{AB}{BC}$

$\sin 72^{\circ}=\frac{x}{110}$

$x=110 \times \sin 72^{\circ}$

$x=104.6$

So, the maximum safe rescue height is 104.6 feet above the height of

the ground.

5 0

3 years ago

Read 2 more answers

Please help me I’ll give brainliest

marin [14]

The equation is 18.1 - x = -0.7

18.1 - -0.7 =
18.1 + 0.7 = 18.8

18.1 - 18.8 = -0.7

Florida’s 3-month temperature is 18.8 degrees C warmer than Montana’s.

5 0

3 years ago

Help me please , ps have a good day :))

serg [7]

Answer:

the second one (Diego)

Step-by-step explanation:

7a-3a

5b+4b

8 0

3 years ago

Read 2 more answers

What is 14=9-x I am trying to solve it

prisoha [69]

14 = 9 - x

First, subtract 9 from both sides.

14 - 9 = (9 - 9) - x
5 = -x

Now divide both sides by -1.
5/-1 = -1/-1x
-5 = x

The answer is x = -5.

6 0

3 years ago

An angle measures (2x + 11).

lidiya [134]

Vertical angles are always congruent, or of equal measure.
Vertical angle is equal to given angle. Answer is:(2x+11)

4 0

3 years ago