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3 years ago

PLS HELP, NO LINKSSSS, WILL MARK BRAINLIEST WHO EVER GETS IT RIGHT

Mathematics

1 answer:

bogdanovich [222]3 years ago

7 0

The answer is the first one 15/17

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PLEASE HELP I WILL MARK BRANLIEST

Finger [1]

Answer:

SAS

Step-by-step explanation:

We must prove that triangles ABC and EDC are congruent.

Since BD bisects AE, then AC is congruent with CE.

Since AE bisects BD, then BC is congruent with CD

Angle C is 90° in the triangle EDC and is also 90° in triangle BCA because they are vertical angles.

Being two sides and the included angle congruent, then both triangles are similar by the SAS theorem.

Answer: SAS

4 0

2 years ago

Suppose that you are headed toward a plataeu 70m high. If the angle of elevation to the top of the platau is 35 degree how far a

SIZIF [17.4K]

Answer:

The distance you are from the base of plateau = $99.97\ m\approx 100\ m$

Step-by-step explanation:

Given:

Height of plateau = 70 m

Angle of elevation to the top of plateau = 35°

To find the distance you are from the base of plateau.

We will construct a triangle ABC to model the given situation. The triangle would be a right triangle for which we know an angle and its opposite side. We need to find the adjacent side of the triangle.

We will apply trigonometric ratio to find the adjacent side.

$\tan\theta=\frac{Opposite\ Side}{Adjacent\ Side}$

where $\theta$ represents the angle of reference.

Plugging in the values from the triangle.

$\tan 35\° =\frac{BC}{AC}$

$\tan 35\° =\frac{70}{AC}$

Multiplying both sides by AC.

$AC\times \tan 35\° =AC\times \frac{70}{AC}$

$AC\times \tan 35\° =70$

Dividing both sides by $\tan 35\°$

$\frac{AC\times \tan 35\°}{\tan 35\°} =\frac{70}{\tan 35\°}$

∴ $AC=99.97\ m\approx 100\ m$

The distance you are from the base of plateau = $99.97\ m\approx 100\ m$

7 0

3 years ago

At sunrise, the temperature was -12 °F. The temperature increased 19 °F each hour for 3 hours. What was the temperature 3 hours

yawa3891 [41]

-12 degree F + 19 + 19 + 19 = 49 degree F
I think the answer is 49 degree F...

4 0

3 years ago

In the equation y = kx, if x is doubled, what happens to y? doubles triples quadruples unknown

s344n2d4d5 [400]

Correct answer is
<u>doubles</u>

7 0

3 years ago

Read 2 more answers

Multiply 5x^3(2x^4-x^3+3)

julia-pushkina [17]

Answer:

10x^7-5x^6+15x^3

Step-by-step explanation:

Distribute the 5x^3 to all the terms

8 0

3 years ago