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3 years ago

A triangle can be right angled and equilateral . true or false

Mathematics

2 answers:

Makovka662 [10]3 years ago

8 0

False. An equilateral triangle has three 60° angles and zero right (90°) angles.

tatiyna3 years ago

6 0

True
hope I helped out!

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The annual 2-mile fun-run is a traditional fund-raising event to support local arts and sciences activities. It is known that th

victus00 [196]

Answer: 0.0228

Step-by-step explanation:

Given : The mean and the standard deviation of finish times (in minutes) for this event are respectively as :-

$\mu=30\\\\\sigma=5.5$

If the distribution of finish times is approximately bell-shaped and symmetric, then it must be normally distributed.

Let X be the random variable that represents the finish times for this event.

z score : $z=\dfrac{x-\mu}{\sigma}$

$z=\dfrac{19-30}{5.5}=-2$

Now, the probability of runners who finish in under 19 minutes by using standard normal distribution table :-

$P(X$

Hence, the approximate proportion of runners who finish in under 19 minutes = 0.0228

8 0

3 years ago

C/- 4 = 16<br> please help

Yuri [45]

Answer:

c = -64

Explanation:

c/(-4) = 16

multiply the equation by -4,

c/(-4) × (-4) = 16 × (-4)

c = 16 × (-4)

c = -64

7 0

3 years ago

Read 2 more answers

A number equals six less than four times a number. What is the number?

WITCHER [35]

Answer:

1.5

Step-by-step explanation:

set x = 6

and x less than four time of 6

it may mean 6÷4

6÷4 = 1.5 #

7 0

3 years ago

Plz<br>I will mark brainliest

Montano1993 [528]

Answer:

a)10

b)-11.4

Step-by-step explanation:

you should find common denominator bit don't forget that they are negative

5 0

3 years ago

What is mZDAR in circle A?

Andreas93 [3]

Answer:

68°

Step-by-step explanation:

Since, angle subtended on the circumference of the circle is half angle subtended on the center of the circle.

$\therefore m\angle DBR = \frac{1}{2} \times m\angle DAR\\\\\therefore 34\degree = \frac{1}{2} \times m\angle DAR\\\\\therefore 34\degree \times 2= m\angle DAR\\\\\therefore 68\degree = m\angle DAR\\\\\therefore m\angle DAR=68\degree$

5 0

3 years ago