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Nezavi [6.7K]
3 years ago
6

HELP me pleaseeeee please

Mathematics
1 answer:
siniylev [52]3 years ago
6 0

Answer:

the answer is C (0, -9)

Step-by-step explanation:

to find y-intercept we need to keep the value x=0

in the given equation

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Can somebody please help me ?? :)
sashaice [31]

Answer:

first option

Step-by-step explanation:

Multiplying a complex number by its conjugate gives a real number and thus removes imaginary numbers in the denominator.

If z = a + bi then its conjugate is a - bi and their product

(a + bi)(a - bi) → where a and b are real

= a² + b² ← a real number

5 0
4 years ago
Sal is tiling his entryway. The floor plan is drawn on a unit grid. Each unit length represents 1 foot. Tile costs $1.05 per squ
jolli1 [7]

Sal will pay $77.78 to tile his entryway  

<h3><em><u>SOLUTION:</u></em></h3>

The image of the question is attached below.  

Given each unit length = 1 foot  

Tile cost per square feet = $1.  65

To find the area, split the floor shape into two shape.  

One is trapezoid and the other is parallelogram.  

Let's count the grid given.  

The parallels sides of trapezoid are 7 ft and 4 ft, height is 7 ft.  

The base and height of the parallelogram are 4 ft and 4 ft respectively.  

Area of the trapezoid =1/2 ×(sum or parallel  sides)× height

                                      =1/2× (7+4)×5

                                       =1/2×11×5

Area of the trapezoid = 27.5 sq.ft  

Area of the parallelogram = base × height  

                                       = 4 ft × 4 ft  

Area of the parallelogram = 16 sq. ft  

Total area = 27.5 sq. ft + 16 sq. ft  

              = 43.5 sq. ft  

Cost of area per sq. ft = $1.65  

Cost of area 43.5 sq. ft = 43. 5 × 1.65  

                                   = $71.775

                                   = $71.78  

Hence Sal will pay $71.78 to tile his entryway.

4 0
3 years ago
Solve 2(×+5) +3×=20 equation with variable on one side
jeyben [28]

Answer:

x=2

Step-by-step explanation:

2x+10+3x=20

5x=10

x=2

3 0
3 years ago
Read 2 more answers
An octagonal pyramid ... how many faces does it have, how many vertices and how many edges? A triangular prism ... how many face
viva [34]

1: 8 faces and 9 with the base 9 vertices and 16 edges

2: 3 faces and 5 with the bases 6 vertices and 9 edges

3: 3 faces and 4 with the base 4 vertices and 6 edges

Hope this can help you.

6 0
4 years ago
What is the student’s error?
amm1812

Answer:

The answer to the question is 10a√2a(b + 2)

Step-by-step explanation:

To know the student's error, let us calculate the perimeter from the the start.

Dimension of the rectangle is given below:

√(50a³b²) and √(200a³)

Perimeter of a rectangle = 2(L + B) = 2L + 2B

2√(50a³b²) + 2√(200a³)

2 x 5ab√2a + 2 x 10a√2a

10ab√2a + 20a√2a

Factorise

10a√2a (b + 2)

Therefore, the student made an error by adding 10ab√2a and 20a√2a together.

Note: we can not add 10ab√2a and 20a√2a together since b is missing in one of the expression.

Therefore, the answer to the question is 10a√2a(b + 2).

5 0
3 years ago
Read 2 more answers
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