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3 years ago

En un colegio hay 290 niñas y 200 niños determina la razón indicada

Mathematics

1 answer:

Nata [24]3 years ago

7 0

290:200

29:20

??? no hablo español bien.

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A customer bought a car and paid $1,080 in sales tax.The rate is 6%?

Ghella [55]

The price of car is $18000

Step-by-step explanation:

Given

Sales tax on car = $1080

Rate = 6%

Let x be the price of the car

We know that as the rate of sale tax is 6%, 6% of x is 1080

Using mathematical notation

0.06x = 1080

Dividing both sides by 0.06

$\frac{0.06x}{0.06} = \frac{1080}{0.06}\\\\x = 18000$

Hence,

The price of car is $18000

Keywords: Rate of tax, Percentage

Learn more about percentae at:

#LearnwithBrainly

7 0

3 years ago

Assume that 13% of people are left-handed. If we select 10 people at random, answer the following questions:

Anastasy [175]

Answer:

0.099, 0.969,0.87,8.3.1.063

Step-by-step explanation:

Let X be the left handed people in the sample of 10 people selected.

X is binomial with n=10 and p = 0.13

a) the probability that there are exactly 3 lefties in the group

= $P(x=3) = 10C3 (0.13)^3 (0.87)^7\\= 0.09945\\=0.099$

b) the probability that there are at least 3 lefties in the group

= $P(X\geq 3) =0.9687\\=0.969$

Now Y number of right handers is binomial with n =10 and p = 0.87

c) the expected number of right-handers in the group.

$=E(Y) = np\\= 10(0.83)\\=8.3$

d) the standard deviation of the number of right-handers in the group

= $\sigma Y = \sqrt{npq} \\=1.063485\\=1.063$

5 0

3 years ago

The first term in a sequence is -2 and the common ratio is 3. What is the sixth term of the sequence?

AlekseyPX

It's the Geometric Sequence.

The n-th term of a geometric sequence with initial value a and common ratio r is given by:

$a_n=a_1\cdot r^{n-1}\ for\ n\in\mathbb{N^+}$

We have:

$a_1=-2;\ r=3;\ n=6$

Substitute:

$a_6=-2\cdot3^{6-1}=-2\cdot3^5=-2\cdot243=-486$

Answer: The sixth term is equal -486.

7 0

3 years ago

11. The Leonin family used 90 kWh for their electric consumption for the month of

almond37 [142]

Answer:

The electric bill of the Leonin family was of $ 877,626.

Step-by-step explanation:

Given that the Leonin family used 90 kWh for their electric consumption for the month of August, if the power consumption costs P9.7514 per kWh, to determine how much is their electric bill, the following calculation must be performed:

9.7514 x 90 = X

877.626 = X

Thus, the electric bill of the Leonin family was of $ 877.626.

3 0

3 years ago

A box of shapes contains 4 triangles, 6 circles, 4 squares, and 1 rectangle. What is the probability of drawing a circle, a squa

GalinKa [24]

Answer:

11/15=73.3%

Step-by-step explanation:

4 0

3 years ago

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