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Nina [5.8K]
3 years ago
5

Match the range of the function f(x) = x2 + 2x − 1 to its domain. Tiles 2 -2 3 -3 Pairs 2 14 7 -1

Mathematics
1 answer:
viva [34]3 years ago
5 0
The domain is without restriction so x=(-oo, +oo)

The range has a minimum because this is a second order equation with a constant positive acceleration.

The minimum can be seen easiest by putting the equation into vertex form

y=x^2+2x-1

y+1=x^2+2x

y+1+1=x^2+2x+1

y+2=(x+1)^2

y=(x+1)^2-2  so the vertex is at the point (-1, -2), and this is the absolute minimum value for y or the range.  As x approaches positive or negative infinity, y approaches positive infinity:

y=range=[-2, +oo)
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In a right triangle, one of the legs is 5 cm smaller than the hypotenuse, and the other leg is 10 cm smaller than the hypotenuse
nata0808 [166]

Answer:

25 cm.

Step-by-step explanation:

If the hypotenuse is  x cm long the 2 legs are  x-5 and x-10 cm long.

So by the Pythagoras theorem:

x^2 = (x - 5)^2 + (x - 10)^2

x^2 = x^2 - 10x + 25 + x^2 - 20x + 100

x^2 - 30x + 125 = 0

(x - 5)(x - 25) = 0

x = 5, 25

We can discard x = 5 because that would make the lengths of the legs negative so the hypotenuse = 25 cm long.

3 0
3 years ago
HELP ! MARKING BRAINLEST TO WORK THIS OUT
natulia [17]

Answer:

16% = 73.6

Step-by-step explanation:

If 1% is = 4.6 then 16% is

1* 16 % = 4.6 * 16

16% = 73.6

8 0
3 years ago
How to do this question plz answer me step by ​
Jet001 [13]

Answer:

481.92

Step-by-step explanation:

First find the increase

466.98 * 3.2%

466.98 * .032

14.94336

Add this to the original amount

466.98+14.94336

481.92336

Round to 2 decimal places

481.92

7 0
3 years ago
b. If each square has a side length of 61 cm, write an expression for the surface area and another for the volume of the figure
Blababa [14]

Answer:

6*(61^2) and 61^3

Step-by-step explanation:

If the squares have a side length of 61 (assuming this is a cube) our surface area is 6*(61^2) because each side is a square and there are six sides.

As for the volume, we have 61^3.

Hope this was helpful.

~cloud

8 0
3 years ago
3. The sum of a number of 2 digits and of the number formed by reversing the digits is 110, and the difference of the digits is
VladimirAG [237]

Answer:

Anahdbd8enduemahehnwkh2vehnsnbvcjuygvvnic

Hinde ko po talaga alam

Step-by-step explanation:

Bcbvcujrirjrhjd26yehfnx

Sorry po talaga

4 0
3 years ago
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