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stiks02 [169]
3 years ago
8

In triangle ABC, m?BAC = 50°. If m?ACB = 30°, then the triangle is triangle. If m?ABC = 40°, then the triangle is triangle. If t

riangle ABC is isosceles, and AB = 6 and BC = 4, then AC =
Mathematics
2 answers:
faust18 [17]3 years ago
7 0

Answer:

C is the answer

Step-by-step explanation:

kumpel [21]3 years ago
4 0

use the pythagorean theorem: a^2 + b^2 = c^2

6^2 = 36

4^2 = 16

36-16 = 20.

the square root of 20 is either a.) the square root of 20 or b.) 4.4721... (rounded 4.5)

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Decimal of 0.516÷4 With process​
steposvetlana [31]
Answer: 0.129
explanation:
8 0
3 years ago
75 POINTS Need an immediate answer please brainliest will be given! A train left a station travelling to a city at 30 mph. The t
yaroslaw [1]

The value of distance between the station and the city in terms of miles which train and car travelled at interval of 2 hours is 129.6 miles.

<h3>What is the rate of speed?</h3>

The rate of speed is the rate at which the total distance is travelled in the time taken. Rate of speed can be given as,

r=d/t

Here, (d) is the distance travelled by the object and (t) is time taken but the object to cover that distance.

The train traveled 1/3 of the distance at 30 mph and the remaining distance at 40 mph. Let <em>t</em> is the time the train has taken to travel and x is the distance it travelled. Thus,

t=\dfrac{\dfrac{1}{3}x}{30}+\dfrac{\dfrac{2}{3}x}{40}\\t=\dfrac{x}{90}+\dfrac{x}{60}\\t=\dfrac{2x+3x}{180}\\t=\dfrac{5x}{180}\\t=\dfrac{x}{36}

After two hour a car left the same station traveled the first 3 hours at 35 mph and the remaining distance at 51 mph. Let <em>t</em> is the time the car has taken to travel and x is the distance it travelled. Thus,

t+2=3+\dfrac{(x-3\times35)}{51}

As t is same, thus put the value of t in this equation,

\dfrac{x}{36}=3-2+\dfrac{(x-3\times35)}{51}\\\dfrac{x}{36}=3-2+\dfrac{(x-3\times35)}{51}\\\dfrac{x}{36}=1+\dfrac{(x-105)}{51}\\\dfrac{x}{36}=\dfrac{(51+x-105)}{51}\\51x=36x-54\times36\\51x-36x=1944\\x=\dfrac{1944}{15}\\x=129.6

Thus, the value of distance between the station and the city in terms of miles which train and car travelled at interval of 2 hours is 129.6 miles.

Learn more about the rate of speed here:

brainly.com/question/359790

#SPJ1

6 0
2 years ago
I don't understand how to do this, can someone please help me?
denis23 [38]

Answer:

x=1

Step-by-step explanation:

First find a common denominator between 7 and 4 which is 28, Multiply both equations by 28 eliminating the denominators so now you have theses two equations: 4(2x + 12) = 7(3x + 5) distribute these equations to get:

8x + 48 = 21x +35 now you want to get the x's on one side so 8-21 = -13 which as an equation so far would be -13x + 48 = 35 now do 35-48 = -13 so you can have 13x alone on one side. Your final equation now before you solve is

-13x = -13 the divide -13 by -13 to get 1.

Hope this helps you understand it better

4 0
3 years ago
Use scientific notation to rewrite the number:
slavikrds [6]
A. 2.603*10^-4
b. 538
3 0
3 years ago
Read 2 more answers
The number of students in a math club decreased from 15 to 11. What is the percent decrease? Round to the nearest percent.
Alinara [238K]

Answer:

27%

Step-by-step explanation:

Decrease= 15-11

=4

Percentage=4÷15

=0.266666667

=26.667%

~27%

4 0
3 years ago
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