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26.02.2021 11:05 •  Математика

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1. Which of the proposed equations are equivalent?
A. - 2x=-20
B.(x-4)(x+ 4)=0
B. 3(x+8)=12
g. x-4=6
A) A, B, and D
B) Ai B
(C) BiV
(D) AiG
2. From the image data, select the ones that have the axis of symmetry:
A)
C)
D)
E)
3. Draw the KM vector. Write down the beginning and end of the vector.
4. The boat for 2 hours on the lake and for 3 hours against the current of the river sails the same distance as
for 3.4 hours along the river. Find the boat's own speed if
the river flow speed is 3 km/h.
5. Solve the equation: 4\x|+5|x|-3=2|x|+11
6. Reduce the inequality to the form or kxs b:
7x + 2 5x +4
7. Mark the points (-7;-3), N (4;55, K (-6;6), and (7;-3) on the coordinate plane.
1) Draw straight MN and KR.
2) Find the coordinates of the intersection point of the lines MN and KR.
3) Find the coordinates of the intersection point of the line MN with the abscissa axis.
4) Find the coordinates of the intersection point of the straight line KR with the ordinate axis.
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1. Какие из предложенных уравнений являются равносильными? A. -2x=-20 Б.(х-4)(х+ 4)=0 B. 3(x+8)=12 Г. х - 4=6 A) А, В и Г B) Аи В C) БиВ D) АиГ