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3 years ago

How do you do this. can you show me step by step .

Mathematics

1 answer:

RSB [31]3 years ago

6 0

B=360-224=136
complement to a=(180-136)/2=44/2=22
a=90-22=68

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Select the correct answer.

Anit [1.1K]

Answer:

C. 21°

Step-by-step explanation:

In triangle ABC, perpendiculars dropped on the sides AB and AC from the ray BD are equal in measure or congruent.

Therefore, ray BD is equidistant from the sides AB and AC.

So, ray BD will be the bisector of angle ABC.

$\therefore m\angle ABD = m\angle DBC$

(Angle bisector theorem)

$\therefore (3x+9)\degree = (45-6x)\degree$

$\therefore 3x+9 = 45-6x$

$\therefore 3x+6x = 45-9$

$\therefore 9x = 36$

$\therefore x =\frac{36}{9}$

$\therefore x =4$

$\therefore (3x+9)\degree = (3*4+9)\degree=(12+9)\degree =21\degree$

$\implies m\angle ABD=21\degree$

4 0

3 years ago

How long does it take an SR-71 Blackbird, one of the fastest U.S. jets, to make a surveillance run of 8912 miles if it travel

MrMuchimi

Answer:

It takes 4 hours to make a surveillance run of 8912 miles.

Step-by-step explanation:

This question can be solved by a simple rule of three.

Average speed of 2228 mph.

So 1 hour -> 2228 miles. How many hours for 8912 miles?

1 hour - 2228 miles

x hours - 8912 miles

$2228x = 8912$

$x = \frac{8912}{2228}$

$x = 4$

It takes 4 hours to make a surveillance run of 8912 miles.

3 0

3 years ago

Read 2 more answers

Let p: x < −3 Let q: x > 3 What is represented by p ∨ q?

anastassius [24]

Answer:

p v q = x < -3 or x > 3

Step-by-step explanation:

We are given

p: x < -3

q: x > 3

and we need to find p v q

v symbols represents disjunction and in simple terms it is called "or"

So, p v q represents either p holds or q holds

So, p v q = x < -3 or x > 3

8 0

3 years ago

Read 2 more answers

If Janelle originally started 575

Ierofanga [76]

Given that Janelle travels at 65 mph. the number of more hours it will

take her to reach her destination is approximately 5 hours.

<h3>How can the time to reach her destination be calculated?</h3>

Possible part of the question that appear missing are;

The distance Janelle drove in 4 hours = 260 miles

The distance from which she started = 575 miles

Required:

The number of extra hours it will take her to reach her destination

Solution:

The remaining distance = 575 miles - 260 miles = 315 miles

$Speed = \mathbf{ \dfrac{Distance}{Time}}$

$Janelle's \ average \ speed = \dfrac{260 \, miles }{4 \, hours} = \mathbf{ 65 \, mph}$

$Time = \dfrac{Distance}{Speed}$

Which gives;

$Time \ to \ reach \ her \ destination = \dfrac{315 \, miles}{65 \, mph} = 4\frac{11}{13} \, hours \approx \mathbf{ 5 \, hours}$

The time it takes Janelle to reach her destination ≈<u> 5 hours</u>

Learn more about average speed during motion here:

brainly.com/question/11241290

3 0

2 years ago

Two angles in a triangle measure 102 degrees and 67 degrees. What is the measure of the third angle?

liraira [26]

All u have to do is 102-67

3 0

4 years ago

Read 2 more answers