I hate doing housework My parents and I are going on holiday tomorrow My parents and I are going ( )( )tomorrow Mom, don't forget to feed the goldfish Mom,don not( )( )( )the goldfish I like washing the car, but I don't like walking I like( )the car,but I don not like to( )for a walk

I hate doing housework My parents and I are going on holiday tomorrow My parents and I are going ( )( )tomorrow Mom, don't forget to feed the goldfish Mom,don not( )( )( )the goldfish I like washing the car, but I don't like walking I like( )the car,but I don not like to( )for a walk


to vocation
forget to feed
washing go



Thank you very much____ me ____ Thank you very much for helping me with the housework


for helping; with



The two trains a and B start from a and B at the same time and run in opposite directions. After 1.5 hours, they meet at 18 kilometers away from the midpoint. It is known that the speed of train a is 1.2 times that of train B. how many kilometers did the two trains travel when they met?


18 × 2 △ 1.5 △ 1.2-1 = 24 △ 0.2, = 120 (km). 120 × 1.2 = 144 (km). 120 × 1.5 = 180 (km). 144 × 1.5 = 216 (km)



Ask for a question about inequality in grade one of senior high school
If two angles a and B satisfy - π / 2


-π/2



The distance between station a and station B is 360 km. The bus and truck start from station a and drive to station B at the same time. The bus runs 60 km per hour and the truck 40 km per hour. When the bus arrives at station B, it immediately returns to station a at the same speed and meets the truck. How many hours have it taken from the departure to the meeting?


360 △ 60 = 6 (hours), (360-40 × 6) △ 40 + 60 + 6, = (360-240) △ 100 + 6, = 120 △ 100 + 6, = 1.2 + 6, = 7.2 (hours); a: it takes 7.2 hours from departure to meeting



A problem of space geometry in Senior High School
P is a point outside the plane ABC. If PA = Pb = PC, ∠ APB = BPC = CPA = 60 degrees, then the cosine value of dihedral angle p-ab-c is


PA = Pb = PC, ∠ APB = BPC = CPA = 60 degree triangle, PAB, PAC, PBC are equilateral triangles passing through P respectively, C is ab vertical line, perpendicular foot is h angle, PAC is plane angle of dihedral angle, PAC is equilateral triangle angle, PAC = 60 degree cosine = 1 / 3



It will take 15 days for team a to build a road, 12 days for team B to build it alone, six days for team a to build it first, and the rest will be jointly built by team a and team B. how many days will it take for team a and team B to build it together?


(1-115 × 6) / (115 + 112) = (1-25) / (320 = 35 × 203 = 4 days) a: it will take four days for team a and team B to work together



Given that a + B = 3, the square of a multiplied by B + a multiplied by the square of B = - 30, find the value of the square of a + B


a²b+ab²=ab(a+b)=-30
ab=-30/(a+b)=-10
(a+b)²=3²
a²+2ab+b²=9
a²+b²=9-2ab=9+20=29



The distance between a and B is 546 km. The second class car starts from two places at the same time, leaves relatively, and meets in three hours. It is known that the speed of car a is three times that of car B, and car a runs every hour
How many kilometers? (Continued)


546/3=182
182/4=45.5
45.5X3=136.5
The speed of car a is 136.5



As shown in the figure, point F is the midpoint of CD, and AF ⊥ CD, BC = ed, ∠ BCD = EDC. (1) verification: ab = AE; (2) connecting be, please point out the relationship between be and AF, be and CD. (just write the conclusion, do not need to prove)


(1) It is proved that: connecting AC and ad, ∵ point F is the middle point of CD, and AF ⊥ CD, ≌ △ ABC ≌ △ AED. ∥ AB = AE. (2) AF ⊥ be; be ∥ CD