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3 years ago

HELP!! Please I need help with this question

Mathematics

1 answer:

lawyer [7]3 years ago

7 0

Z-4.5 = -1.5

Add 4.5 to each side:
z = -1.5 + 4.5z = 3

Cedric is correct because he used the inverse of subtraction and added 4.5.

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Qual o resultado da subtração dos dois polinômios abaixo? (2x2 + 4x) (–2x2 + x – 6)

Len [333]

Answer:

-4x^4-6x^3-8x^2-24x

Step-by-step explanation:

$\left(2x^2+4x\right)\left(-2x^2+x-6\right)\\$

distribuir parênteses

$=2x^2\left(-2x^2\right)+2x^2x+2x^2\left(-6\right)+4x\left(-2x^2\right)+4xx+4x\left(-6\right)$

Aplicar regras de menos mais ; $+\left(-a\right)=-a$

$=-2\times\:2x^2x^2+2x^2x-2\times\:6x^2-4\times\:2x^2x+4xx-4\times\:6x$

simplificar

$-2\times\:2x^2x^2+2x^2x-2\times\:6x^2-4\times\:2x^2x+4xx-4\times\:6x:\\\quad -4x^4-6x^3-8x^2-24x$

7 0

4 years ago

Need help, what is the answer???

IRISSAK [1]

Answer:

Step-by-step explanation:

3 0

3 years ago

Is this correct way to solve the problem?

Shkiper50 [21]

Answer:

10x=40

x=40/10

x=4

4 is the answers, not -4

Step-by-step explanation:

pls mark as brainliest

8 0

3 years ago

Choose one of the polygons that are similar to polygon A, and describe a sequence of transformations that take polygon A to the

skad [1K]

E is similar, a rotation and translation can take polygon A to polygon E. Step-by-step explanation: a rotation 90 degrees counter clockwise around point r and a translation 4 down and 9 right will take plygon A to E.
You visited this page on 3/12/21.

5 0

3 years ago

4. An English-speaking tourist visits a country in which 30% of the population speaks English. He needs to ask someone direction

12345 [234]

Answer:

a) 30%

b) 75.99%

Step-by-step explanation:

a) The probability that one random person will be able to speak English is equal to the percent of the population that speaks English. This is because, in the country, (number of favorable outcomes)/(number of total outcomes) = 30% = 0.3 = 3/10

b) The probability that at least one person speaks English is equal to 1 - (probability that none of them speak English). Of the 4 people, if N represents them not speaking English and Y represents them speaking English, here are a few possiblities:

NNNN

NYYY

NNYY

NNNY

YNNN

and so on. However, there is only one possibility where none of them speak English, and the opposite of "none" is "at least one". So, the probability thsat none of them speak English is P(A and B and C and D) = P(A)*P(B)*P(C)*P(D), where P(A) represents the probability that the first person doesn't speak English and so on. The probability that the first person doesn't speak English = 1 - (probability that the first person speaks English) = 1 - 30% = 0.7. Therefore, the probability that all of them don't speak English is 0.7^4 = 0.2401 and the probability that at least 1 of them speak English is 1- 0.2401 .= 0.7599 = 75.99%

4 0

2 years ago