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Andre45 [30]
2 years ago
12

To which set of numbers does the number sqr rt-16 belong? Select all that apply

Mathematics
1 answer:
Sever21 [200]2 years ago
3 0

Answer:

The square root of -16 is an imaginary number and a complex number. Sqrt(-16)=4i. We use the i to indicate that the number is imaginary since there is no number that can be multiplied by itself to get a negative number (a negative times a negative is a positive, and a positive times a positive is also a positive). So the use of i tells you immediately that it's an imaginary number. You can tell the number is complex because it has both a real and an imaginary part and could be written in the form a+bi, where a is a real number and bi is an imaginary number. In this specific case, the real part (a) is 0 and the imaginary part (bi) is 4i.

Step-by-step explanation:

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rectangle DOIT has vertices at D(-20,3) O(20,3) I(20,-6) T(-20,-6) what is the area of rectangle DOIT
AnnZ [28]

Answer:

360 sq. units

Step-by-step explanation:

area of DOIT = (20+20) × (3+6)

= 40×9 = 360 sq. units

7 0
2 years ago
Find the area of the figure
VLD [36.1K]

Answer:

132 cm²

Step-by-step explanation:

Consider the shape as a trapezoid with a rectangle added on top.

The area of the trapezoid is (7+19)/2 × 8 =104

The area of the rectangle is 7×4 = 28

Add the two areas: 104+28= 132

OR consider the shape as a tall rectangle with the two triangles added to the sides.

The area of the rectangle is 7(4+8) = 84

The area of the triangles is 8(19-7)/2= 48

[Each triangle is 24 cm²]

Add those areas

84+48=132

Same result: 132 cm²

4 0
2 years ago
Which expression are equivalent to 2x+4
Ksivusya [100]

Answer:

2(x+2)

Step-by-step explanation:

Factor out the 2.

4 0
3 years ago
I’ve been stuck on this for 3 days today is the last day please help me guys
OleMash [197]

y = x^2 - 2x - 3

Factored Form: y = (x - 3)(x + 1)

X-Intercepts: (3, 0) and (-1, 0)

Axis of Symmetry: x = 1

Vertex: (1, -4)

Domain: All Real Numbers (or negative infinity to infinity)

Range: y > -4

Hope this helps!

7 0
2 years ago
If f(x)=16x- 30 and g(x)= 14x-6, for which value of x does (f-g)(x)=0?
Georgia [21]

Answer:

x=12

Step-by-step explanation:

16x-30-(14x-6)=2x-24=0. add 24 on both sides to get 2x=24. divide by 2 on both sides to get x=12

7 0
2 years ago
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