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snow_lady [41]
3 years ago
12

Find if f(x) = 2x - 1 and g(x) = x + 2.

Mathematics
1 answer:
Readme [11.4K]3 years ago
7 0

2x+3 is the answer.................................................................

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Is xy = 1 a function
Mandarinka [93]
Yes it is a function

7 0
3 years ago
Read 2 more answers
if the equation x^2 +(k+2)x+2k=0 has equal roots,then the value of k is .....a.2 b.-2 c 1/2 d.none ​
blsea [12.9K]

Answer:

k=2

Problem:

if the equation x^2 +(k+2)x+2k=0 has equal roots,then the value of k is ..

Step-by-step explanation:

Since the coefficient of x^2 is 1, we can use this identity to aid us: x^2+bx+(b/2)^2=(x+b/2)^2.

So we want the following:

[(k+2)/2]^2=2k

Apply the power on the left:

(k+2)^2/4=2k

Multiply both sides by 4:

(k+2)^2=8k

Expand left side:

k^2+4k+4=8k *I used identity (x+c)^2=x^2+2xc+c^2

Subtract 8k on both sides:

k^2-4k+4=0

Factor using the identity mentioned a couple lines above:

(k-2)^2=0

Since zero squared is zero, we want k-2=0.

Adding both sides by 2 gives k=2.

8 0
3 years ago
A stack of cards is numbered 1 to 21. Kelly pulls one card from the stack. What is the best approximation for the probability th
ASHA 777 [7]
The correct answer is 48%

There are 10 even numbers from 1 to 21.

That makes the probability of an even number 10 out 21.

10 / 21 x 100 = 48%
8 0
3 years ago
Observe the graph below. The scale factor used to dilate ABC was...
Lera25 [3.4K]

Answer:

3

Step-by-step explanation:

AB = 1 unit

A'B' = 3 units

The scale of dilation = A'B'/AB

Therefore:

scale of dilation = 3 units / 1 unit = 3

This means that ABC was dilated or enlarged in size by multiplying every of its segment by 3. In essence, A'B'C' is 3 times the size of ABC.

7 0
2 years ago
Write an integer for the following<br> situations.<br> Sam swims 45 feet below sea level.
sveticcg [70]

The integer that represents this -45.

3 0
1 year ago
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