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zaharov [31]
3 years ago
10

Which statements are true? Select all that apply.

Mathematics
1 answer:
ohaa [14]3 years ago
5 0

Answer:

Two of these statements are true.

The function equals x^2 over the interval −∞ < x ≤ 0.

The function equals √x over the interval 0 ≤ x < ∞.

Step-by-step explanation:

If we look at the parent function of x^{2} we see that x^{2} function looks like a U shaped graph and in your graph we see it is the same as your graph from the interval (-∞,0).

If we look at the parent function of \sqrt{x}  we see that the

\sqrt{x} function looks like your graph from the interval (0,∞).

Suggestion:

I suggest memorizing every graph of parent functions that is introduced to you in math. This can help you visually with many problems in mathematics, and help you conceptualize material better. I also suggest looking up the definition of every word that may be unfamiliar to you like "interval" and "parent function". This will help you understand more advanced math notations and vocabulary in the future.

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If 30 is increased by 20%, what is the new amount?
Burka [1]

Answer:

The new amount is 36

Step-by-step explanation:

we know that

100%+20%=120%

Let

x-----> the new amount

The number 30 represent the 100%

so

by proportion

30/100%=x/120%

x=120*30/100=36

8 0
3 years ago
Create an expression equivalent to 2 (3x =1) 3x+4 using the least number of terms
Mariana [72]

Answer:

18x^2 + 18x -8

Step-by-step explanation:

To use the least number of terms, simplify the expression. To simplify, distribute into the parenthesis and combine like terms.

2(3x-1)(3x+4) = 2(9x^2-3x+12x-4) = 2(9x^2+9x-4) = 18x^2 + 18x -8

6 0
3 years ago
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olchik [2.2K]

Answer:

1.) yes

2.) no

Step-by-step explanation:

1.) Yes

3x - 2y = 1

3(5) - 2(7) = 1

15 - 14 = 1

1 = 1

2.) No

2x + 8y = 26

2(-3) + 8(-4) = 26

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3 0
3 years ago
Read 2 more answers
3cis(5pi/4) in polar form
madreJ [45]
Rectangular form:
z = -2.1213203-2.1213203i

Angle notation (phasor):
z = 3 ∠ -135°

Polar form:
z = 3 × (cos (-135°) + i sin (-135°))

Exponential form:
z = 3 × ei (-0.75) = 3 × ei (-3π/4)

Polar coordinates:
r = |z| = 3 ... magnitude (modulus, absolute value)
θ = arg z = -2.3561945 rad = -135° = -0.75π = -3π/4 rad ... angle (argument or phase)

Cartesian coordinates:
Cartesian form of imaginary number: z = -2.1213203-2.1213203i
Real part: x = Re z = -2.121
Imaginary part: y = Im z = -2.12132034
8 0
3 years ago
B Find the class that contains the median. <br><br><br><br> c Find the modal class.
Alex_Xolod [135]

Answer:

can you add a paper or more info to answer

Step-by-step explanation:

5 0
3 years ago
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