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noname [10]
3 years ago
10

Ayudaaa plis7-4= 6-2=-3-2=-8+9=-9+5=1+10=​

Mathematics
2 answers:
vladimir2022 [97]3 years ago
6 0

Answer:

7-4=3

6-2=4

-3-2= -5

-8+9=1

-9+5= -4

1+10=11

Step-by-step explanation:

No es tan difícil, puedes g0oglearlo

Alex17521 [72]3 years ago
3 0

Answer: 3, 4, -5, 1, -4, 11

Step-by-step explanation:

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Twenty-five cards are numbered from 1 to 25 and placed in a box. One card is selected at random and not replaced. Another card i
LuckyWell [14K]

Answer:

11/50

Step-by-step explanation:

In draw 1,

Favourable outcome / Total number of possibilities = 12/25

In draw 2,

Favourable outcome / Total number of possibilities = 11/24

Total chance of getting 2 even numbered cards = 12/25 * 11/24 = 11/50

6 0
4 years ago
An anthropologist wishes to estimate the average height of men for a certain race of people. If the population standard deviatio
mario62 [17]

Answer:

The probability that the difference between the sample mean \bar{x} and the true population mean \mu is : P[|\bar{x}-\mu|\leq0.7]=0.9876

Step-by-step explanation:

Given :

Population standard deviation \sigma=2.8.

Sample size n=100

The sample mean standard deviation=\frac{\sigma}{\sqrt{n}}

To find :

The probability that the difference between the sample mean \bar{x} and the true population mean \mu

\because\frac{\sigma}{\sqrt{n}}=\frac{2.8}{\sqrt{100}}=\frac{2.8}{10}=0.28

Now, the probability that the difference between the sample mean \bar{x} and the true population mean \mu is :

  P[|\bar{x}-\mu|\leq0.7], nis large \Rightarrow \frac{\bar{x}-\mu}{\frac{\sigma}{\sqrt{n}}}=z

\Rightarrow P[\frac{\bar{x}-\mu}{\frac{\sigma}{\sqrt{n}}}

\Rightarrow P[z

\Rightarrow P[-2.5

Therefore, the probability P[|\bar{x}-\mu|\leq0.7]=0.9876

5 0
3 years ago
Em quantos meses um capital de R$4.000,00 aplicado a uma taxa de juros simples de 29,3% ao ano, renderá de juros o valor de R$58
Akimi4 [234]

Responda:

6 meses

10 meses

Explicação passo a passo:

Dado que:

Principal = 4000

Juros = 586

Taxa (r) = 29,3% ao ano = 0,293

Juros simples = principal * taxa * tempo

586 = 4000 * 0,293 * t

586 = 1172t

t = 586/1172

t = 0,5 anos

Tempo = (0,5 * 12) = 6 meses

B.)

principal = $ 90909,09

Montante final = 100.000

Taxa (r) = 12% = 0,12

Usando a fórmula:

Quantidade final = p (1 + rt)

Taxa = r; t = tempo

100000 = 90909,09 (1 + 0,12t)

100000 = 90909,09 + 10909,0908t

100000 - 90909,09 = 10909,0908t

9090,91 = 10909,0908t

t = 9090,91 / 10909,0908

t = 0,8333334

Número de meses:

0,8333334 * 12

= 10 meses

4 0
3 years ago
Micah deposits C dollars in a bank. The deposited amount earns an annual interest rate of r% and becomes D dollars in t years ac
vovangra [49]

Answer:

t = \frac{100}{r} [\frac{D}{C} - 1]

Step-by-step explanation:

Assume that the deposited amount C dollars earn r% simple interest annually.

If after t years the deposited amount C dollars grows to D dollars, then we are asked to write a relation using the given terms to calculate t.

Now, using the formula of simple interest we can write

D = C(1 + \frac{t\times r}{100})

⇒ 1 + \frac{t \times r}{100} = \frac{D}{C}

⇒ \frac{t \times r}{100} = \frac{D}{C} - 1

⇒ t = \frac{100}{r} [\frac{D}{C} - 1]

So, this is the expression for t. (Answer)

7 0
3 years ago
Read 2 more answers
Daniel has $100. After he buys 4 pencils and 3 pens, he has $7 left. If each pencil costs $3 more than each pen, is $25 enough t
amm1812

Answer:  Yes, Daniel has enough money to buy 2 pens.

=========================================================

Explanation:

x = cost of one pencil

y = cost of one pen

4x = cost of 4 pencils

3y = cost of 3 pens

4x+3y = cost of 4 pencils and 3 pens

100 - (4x+3y) = amount Daniel has left = 7 dollars

100-(4x+3y) = 7 is one equation we can form

Another equation we can form is x = y+3 because "each pencil costs $3 more than each pen".

Let's plug that into the first equation and solve for y.

100-(4x+3y) = 7

100-(4(y+3)+3y) = 7

100 - (4y+12+3y) = 7

100 - (7y+12) = 7

100 - 7y - 12 = 7

-7y + 88 = 7

-7y = 7-88

-7y = -81

y = -81/(-7)

y = 11.57 is the cost of one pen

2y = 2*11.57 = 23.14 is the cost of two pens.

Since this is less than $25, this means he has enough to buy two pens. This assumes that we either ignore tax, or the tax is already included in the listed prices.

5 0
2 years ago
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