Pleaseee helpppp I really need it now please

If a triangle has at least two congruent sides, it is an isosceles triangle. An equilateral triangle has three congruent sides.

Bingel [31]

B. An equilateral is an isosceles triangle

3 0

3 years ago

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Please help me please will give brainliest to anyone who is good

hichkok12 [17]

Answer:

C

Step-by-step explanation:

N = st

Number of toothpicks = (number of students) x (toothpicks)

5 0

3 years ago

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Mopeds (small motorcycles with an engine capacity below 50cm3) are very popular in Europe because of their mobility, ease of ope

d1i1m1o1n [39]

Answer:

a) 96.64% probability that maximum speed is at most 50 km/h

b) 24.67% probability that maximum speed is at least 48 km/h

c) 86.64% probability that maximum speed differs from the mean value by at most 1.5 standard deviations

Step-by-step explanation:

When the distribution is normal, we use the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this question, we have that:

$\mu = 46.8, \sigma = 1.75$

A. What is the probability that maximum speed is at most 50 km/h?

This is the pvalue of Z when X = 50. So

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{50 - 46.8}{1.75}$

$Z = 1.83$

$Z = 1.83$ has a pvalue of 0.9664

96.64% probability that maximum speed is at most 50 km/h.

B. What is the probability that maximum speed is at least 48 km/h?

This is 1 subtracted by the pvalue of Z when X = 48.

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{48 - 46.8}{1.75}$

$Z = 0.685$

$Z = 0.685$ has a pvalue of 0.7533

1 - 0.7533 = 0.2467

24.67% probability that maximum speed is at least 48 km/h.

C. What is the probability that maximum speed differs from the mean value by at most 1.5 standard deviations?

Z = 1.5 has a pvalue of 0.9332

Z = -1.5 has a pvalue of 0.0668

0.9332 - 0.0668 = 0.8664

86.64% probability that maximum speed differs from the mean value by at most 1.5 standard deviations

6 0

3 years ago

The length of one leg of a right triangle is 3 feet more than the other leg. If the hypotenuse is 15 feet find the length of eac

melamori03 [73]

Answer:

Leg1 = 9 and leg2 = 12

Step-by-step explanation:

Points to remember

Pythagorean theorem

Hypotenuse² = Base² + Height²

To find the length of each leg

It is given that, hypotenuse = 15 feet

Let base = x the height = x +3

By using Pythagorean theorem we can write,

Hypotenuse² = Base² + Height²

15² = x² + (x + 3)²

225 = x² + x² + 6x + 9

2x² + 6x + 216 = 0

x² + 3x + 108 = 0

By solving we get x = 9 and x -12

Therefore one leg = 9 and other leg = 9 + 3 = 12

5 0

3 years ago

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I need help on 1/2/3/4

vaieri [72.5K]

You may need to sit down with your parents or with your teacher and
go over how to add and subtract fractions.

1). "Perimeter" means the distance all the way around the square.
With a square, all 4 sides are the same length. With this square,
every side is 1-1/4 inches long.

Perimeter = length of all 4 sides= (1-1/4) + (1-1/4) + (1-1/4) + (1-1/4) =

 (1 + 1 + 1 + 1) + (1/4 + 1/4 + 1/4 + 1/4) =

 4 + 4/4 = 5 inches .

2). (2-3/8) + (1-7/8) = (2 + 1) + (3/8 + 7/8) =

 (3) + (10/8) =

 3 + 1-1/4 = 4-1/4 .

3). The difference is (1-1/6) minus (5/6) .

Before you start to do the subtraction, write the (1-1/6) as (7/6) .

Then the subtraction is (7/6) - (5/6) = 2/6 = 1/3 .

4). This one is almost the same kind of problem as #3.
It's another subtraction.

If you need (2-1/4) all together, and you already have (1-3/8),
then the amount you still have to find, or borrow, or buy, is the
difference between those two numbers.

 (2-1/4) minus (1-3/8) .

The trick is to write the (2-1/4) in some form that you'll be able to
subtract (1-3/8) from it. When I learned how to do that, it was called
'borrowing', but I think now it's called 'regrouping'.

We need to work on (2-1/4):

-- take 1 from the 2, and change it into fourths.

 2-1/4 = 1 and 4/4 and 1/4 = 1 and 5/4

-- Now, take those 5/4, and turn them into eighths.
 Each fourth makes 2 eighths. So 5/4 = 10/8.

Now, the (2-1/4) has turned into 1-10/8 .
We did NOT change the value. It's still the same amount
as 2-1/4 , but it's just written in a different way.
And now the subtraction is easy:

 (2-1/4) minus (1-3/8) =

 (1-10/8) minus (1-3/8) = (zero and 7/8).

You need 7/8 inch more string than you already have.

5 0

3 years ago