Mathematics, 28.07.2019 04:33 Maya629277

Solve all the questions or at least one .

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X = apples and y = oranges
3x + 2y = 9.93...multiply by 2
2x + 3y = 9.82...multiply by -3

6x + 4y = 19.86 (result of multiplying by 2
-6x - 9y = - 29.46 (result of multiplying by -3)
add
-5y = - 9.6
y = -9.6 / -5
y = 1.92 < cost per kg for oranges

2x + 3y = 9.82
2x + 3(1.92) = 9.82
2x + 5.76 = 9.82
2x = 9.82 - 5.76
2x = 4.06
x = 4.06/2
x = 2.03 <== cost per kg per apples

P = 2(L + W)
P = 30
L = 2W

30 = 2(2W + W)
30 = 2(3W)
30 = 6W
30/6 = W
5 = W <=== width is 5 cm

L = 2W
L = 2(5)
L = 10 <== length is 10 cm

x = first number and y = second number
4x + 3y = 15multiply by 2
3x - 2y = 7...multiply by 3

8x + 6y = 30 (result of multiplying by 2)
9x - 6y = 21 (result of multiplying by 3)
add
17x = 51
x = 51/17
x = 3 <=== first number

3x - 2y = 7
3(3) - 2y = 7
9 - 2y = 7
-2y = 7 - 9
-2y = -2
y = -2/-2
y = 1 <=== second number

x = sons age and y = fathers age
2x + y = 95
x + y = 70...multiply by -1

2x + y = 95
-x - y = -70 (result of multiplying by -1)
add
x = 25 <== sons age

2x + y = 95
2(25) + y = 95
50 + y = 95
y = 95 - 50
y = 45 <=== fathers age

sorry but I dont know the last one...never was good at those kinds of problems

Answer from: Quest

Ais the correct answer

Answer from: Quest

when rotating a figure 180 degrees, imagine that you are able to take the figure and turn it clockwise or counterclockwise around a center point. to rotate a figure 180 degrees, you will need to apply the rule (x, y) → (-x, -y). start by using a coordinate grid with coordinates for each vertex of the figure. the center point of the coordinate grid is located at (0, 0), which is what you will rotate the figure around. write down the original coordinates of the shape you are going to rotate. then, apply the rule. for example, coordinate (1, 2) becomes (-1, -2). another example would be, coordinate (-4, -2) becoming (4, 2). after you change each original coordinate to the rotated coordinate, you will draw your new figure.

step-by-step explanation:

Identify the transformation that maps the figure with center (7, 1) onto itself. a) rotate 180° cloc

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