So AB=4x=4.
2.180-∠ a = 7/3 ∠ a+10 so ∠ A = 127.5.
3. The bottom area is 9, so the side length is 3cm. The side length is 3×4×2+4×4=40.
4._ _ A _ B _ _
1, 4 times
2. One third
3, half
5. Because (a+8) 2+| b–7 | = 0,
Although (a+8) 2 and | b–7 | are nonnegative,
So a+8=0 and b-7=0 get a=-8 and b=7.
So (a+b )2oo2+(a+b) 2oo3=0.
6.- 1/2+(- 1/3)=-5/6
The reciprocal is -6/5.
The square is 36/25.
Multiply it by the square of 5, that is, 25 gets 36.
So the answer is 36.
7. Suppose the distance to work is X kilometers, then
1/ 10x÷5+(9/ 10x- 1)÷25+ 1÷5 = x÷5-2
The solution is x= 15.
So the distance to work is 15 km.
8. Suppose you hit X three-pointers and Y two-pointers, then
x+y= 14-3
3x+2y=28-3
The solution is x=3 and y=8.
So I hit three threes and eight twos.
9. If the free weight is xkg and the excess baggage fee is Y yuan /kg, then
3x+0.5÷y+ 1.5÷y+2.5÷y = 120
x+9.5÷y= 120
X=25，y=0. 1。
Xiaojie's luggage weight is 25+0.5÷0. 1=30kg.
Xiaoming's luggage weighs 25+ 1.5÷0. 1=40kg.
Xiaoli's luggage weighs 25+2.5÷0. 1=50kg.
10. No solution
Are you sure this is the problem? Is it 2/3 instead of 3/2? I guess there is no solution to this problem.
? Ax+5=(7x-3) 2/ 100。 Are you sure? I still have no solution after calculating. . . A and x are impossible.
Both are positive integers.
"What does something look like" means what does something look like.
oppositely
The ocean "Pacific Ocean" is the Pacific Ocean.
The heaviest and heaviest
You can know that the stone can't be found on that island, but it will be found.
Look for it on other islands.
Four. C C A A C