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3 years ago

Qual o valor numérico do polinômio 3x+2y para x=3 e y=1?

1 answer:

n200080 [17]3 years ago

6 0

El valor numérico sería 11. Si reemplaza x con 3, 3x3 = 9. Si reemplaza y con 2, sería 2x1 = 2. 9 + 2 = 11. (I’m sorry my Spanish is not that good)

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10 points someone help me please!?

Soloha48 [4]

Answer:

$\large\boxed{b=\sqrt{95}}$

Step-by-step explanation:

Use the Pyhagorean theorem:

$leg^2+leg^2=hypotenuse^2$

We have

$leg=b,\ leg=7,\ hypotenuse=12$

Substitute:

$b^2+7^2=12^2$

$b^2+49=144$ subtract 49 from both sides

$b^2=95\to b=\sqrt{95}$

7 0

3 years ago

Gina has an meeting in 45 min. She is driving at a rate of 30 mi/h. If she is 24 mi away, will she arrive on time? If not, how e

dsp73

Gina will be late because she's still missing 1.5 miles

7 0

3 years ago

Given the function f(x) = -2c+cx-x^2, and f^-1(5) = -1, find c

AnnZ [28]

Answer:

$c=-2$

Step-by-step explanation:

We are given the function:

$f(x) = -2c + cx - x^2$

And that:

$\displaystyle f^{-1} (5) = -1$

And we want to determine the value of c.

Recall that by definition of inverse functions:

$\displaystyle \text{If } f(a) = b, \text{ then } f^{-1}(b) = a$

So, since f⁻¹(5) = -1, then f(-1) = 5.

Substitute:

$f(-1) = 5 = -2c + c(-1) - (-1)^2$

Simplify:

$5 = -2c - c - (1)$

Combine like terms:

$6 = -3c$

And divide. Hence:

$c = -2$

In conclusion, the value of c is -2.

8 0

3 years ago

Ben is 4 times as old as Ishaan. 6 years ago, Ben was 6 times as old as Ishaan

Svetlanka [38]

Answer:

The correct answer is - Ben is 8.

Since Ben is 4 times older than Ishaan, but also we know the fact that Ben is 6 years older than Ishaan, that leaves us with only one number as the possible solution, the number 8.

In order to get to the result we should find a number that multiplied by four and summed up with six, gives the same result.

4 x 2 = 8

2 + 6 = 8

Knowing now that the age of Ben is 8, we can also conclude that the number used for multiplying and summing, 2, is the number that represents the age of Ishaan.

Step-by-step explanation:

4 0

3 years ago

Pleaseee helpp meeee

monitta

Answer:

Step-by-step explanation:

2(5)+4(5)-9-7

10+20-16

6 0

3 years ago