MATHEMATICS HIGH SCHOOL

What is the square root of -1?

Answers

Answer 1
Answer:

Answer:

The square root of -1 is i
Answer 2
Answer:

Your question is "what is the square root of i", the answer is just i

i represents an imaginary number, in other words a term for non real numbers

Answer:

i

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Which graphs represent functions?

Answers

Answer:

A. Only graph B and D

Step-by-step explanation:

Hi, to answer this question we have to analyze the options given:

A function has only one output value (y) for each input value.(x)

In other words, If we draw a vertical line (anywhere on the graph) that intersects the graph in two points or more, then the graph does not represent a function because that x value has more than one output(y).

So, the correct option is:

A. Only graph B and D

I need help with 8-35 and 8-36

Answers

Answer:

8 - 35

a. 350 unit²

b. 81.23  unit²

c. 41.57 unit²

8 - 36

Beth should buy 3 bags of fertilizer

Step-by-step explanation:

8 - 35

a. The figure consists of 9 isosceles triangles of side lengths 11 and vertex angle = 360/9 = 40°

Hence base angles = (180 - 40)/2 = 70°

Therefore, the base of the triangles = sin(40) × 11/sin(70) = 7.52

Hence area of figure = 9 × 0.5 × 7.52 × √(11² - (7.52/2)²) =349.99 ≈ 350 unit²

b. Area of a decagon

We note that the vertex angle = 36°

∴ Half the base = tan(18) × 5 = 1.62

Area = 10 × 1.62 × 5 = 81.23  unit²

c. The area of a hexagon = s^2 * (3√(3) )/(2)

s = 4 therefore, the area = 4^2 * (3√(3) )/(2) = 41.57 \, unit^2

8 - 36

Area, A of a regular pentagon = A = a^2 * (1)/(4) \sqrt{5(5 + 2√(5) )}

a = 15 ft., therefore, A = 15^2 * (1)/(4) \sqrt{5(5 + 2√(5) )} = 387.11 ft.²

Therefore, since a bag of fertilizer can fertilize 150 ft.², the number of bags of fertilizer that will fertilize 387.11 ft.² will be 387.11/150 = 2.58 bags

Therefore, since 2 bags of fertilizers will not be enough, Beth should buy 3 bags of fertilizer.

One brother eats 3/5and the other brother eat 3/10 of the cereal how much more does the other brother eat

Answers

In this question there are information's of immense importance and that can go a long way in helping to solve the given question. It is given that one brother eats 3/5 of the cereal and the other brother eats 3/10 of the cereal. The answer that needs to be found is that the amount of cereal the other brother eats more.
The amount of cereal eaten more by the other brother = (3/5) - (3/10)
                                                                                       = ( 6 - 3)/ 10
                                                                                       = 3/10
So the other brother does not eat more, but the first brother has eaten 3/10 more than the other brother.
well 3/5 is equal to 6/10
then you would subtract 6/10-3/10=3/10

If (x − 2)^2=49, then x could be ?

Answers

(x - 2)^2=49\n \n x^2-4x +4 -49=0\n \nx^2-4x -45 = 0\n \n\Delta = b^(2)-4ac = (-4)^(2)-4*1* (-45)= 16+180=196 \n \nx_(1)=(-b-√(\Delta ))/(2a) =(4-√(196))/(2)=(4-14)/(2)=(-10)/(2)=-5 \n \nx_(2)=(-b+√(\Delta ))/(2a) =(4+√(196))/(2)=(4+14)/(2)=(18)/(2)=9 \n \nAnswer : \ x=-5 \ or \ x= 9
(x-2)(x-2) 
x^2   -2x   -2x  +4    =49  (-49 from both sides)
X^2-4x-45
(x+5)(x-9)
x=-5, x=9 

How do you find the fisrt quartile

Answers

The first quartile (Q1) is defined as the middle number between the smallest number and the median of the data set. The second quartile is the median of the data. The third quartile (Q3) is the middle value between the median and the highest value of the data set.

Answer:

Find the median of the first half of the data

Step-by-step explanation:

I need math help ....

Answers

number one is B I believe
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