close
標題:
中一maths 急急急急 急急急急急 !!!!!
Simplife each of the following algebraic expressions(a) 6a+3-2(b) 2m+3n-3-5nSolve the following equations(a) 5(3h-8)+2=7(b) 3(7-2k)+4=-11(c) e/4+6=e(d) 八份三f+3=八份七f-5Caeman's mother is now 41 years old . 5 years ago , she was 4 times as Carmen.How old is Carman... 顯示更多 Simplife each of the following algebraic expressions (a) 6a+3-2 (b) 2m+3n-3-5n Solve the following equations (a) 5(3h-8)+2=7 (b) 3(7-2k)+4=-11 (c) e/4+6=e (d) 八份三f+3=八份七f-5 Caeman's mother is now 41 years old . 5 years ago , she was 4 times as Carmen.How old is Carman now?(方程) Use index notation to write 90 as a product of prime factors .(要steps)
最佳解答:
(a) 6a+3-2 = 6a + ( 3 - 2 ) = 6a + 1 (b) 2m+3n-3-5n = 2m + ( 3n - 5n ) - 3 = 2m + ( -2n ) - 3 = 2m - 2n - 3 Solve the following equations (a) 5(3h-8)+2=7 15h - 40 + 2 = 7 15h - 38 = 7 15h - 38 + 38 = 7 + 38 15h = 45 15h ÷ 15 = 45 ÷ 15 h = 3 (b) 3(7-2k)+4=-11 21 - 6k + 4 = -11 25 - 6k = -11 25 - 6k - 25 = -11 - 25 -6k = -36 6k = 36 6k ÷ 6 = 36 ÷ 6 k = 6 (c) e/4+6=e e ÷ 4 + 6 = e 4 ( e ÷ 4 + 6 ) = 4e e + 24 = 4e e + 24 - e = 4e - e 24 = 3e 24 ÷ 3 = 3e ÷ 3 8 = e e = 8 (d) 八份三f+3=八份七f-5 有兩 Case , Case 1 : ( 3 ÷ 8 ) × ( f + 3 ) = ( 7 ÷ 8 ) × ( f - 5 ) 8 ( 3 ÷ 8 ) × ( f + 3 ) = 8 ( 7 ÷ 8 ) × ( f - 5 ) 3 ( f + 3 ) = 8 ( f - 5 ) 3f + 9 = 8f - 40 3f + 9 - 3f = 8f - 40 - 3f 9 = 5f - 40 9 + 40 = 5f - 40 + 40 49 = 5f 49 ÷ 5 = 5f ÷ 5 9.8 = f f = 9.8 Case 2 : ( 3 ÷ 8 ) f + 3 = ( 7 ÷ 8 ) f - 5 8 [ ( 3 ÷ 8 ) f + 3 ] = 8 [ ( 7 ÷ 8 ) f - 5 ] 3f + 24 = 7f - 40 3f + 24 - 3f = 7f - 40 - 3f 24 = 4f - 40 24 + 40 = 4f - 40 + 40 64 = 4f 64 ÷ 4 = 4f ÷ 4 16 = f f = 16 Carman's mother is now 41 years old . 5 years ago , she was 4 times as Carmen.How old is Carman now?(方程) Let Carman is x years old now 4 ( x - 5 ) = 41 - 5 4x - 20 = 36 4x - 20 + 20 = 36 + 20 4x = 56 4x ÷ 4 = 56 ÷ 4 x = 13 Carman is 13 years old now . Use index notation to write 90 as a product of prime factors .(要steps) 90 = 2 × 45 = 2 × 5 × 9 = 2 × 5 × 3 × 3 = 2 × 5 × 3^2 = 2 × 3^2 × 5
其他解答:
(a) 6a+3-2 =6a+(3-2) =6a+1 (b) 2m+3n-3-5n =2m+3n-5n-3 =2m-2n-3 (a)5(3h-8)+2=7 15h-40+2=7 15h=45 h=3 write these first, answer later|||||(a) 6a+3-2 = 6a + 1 (b) 2m+3n-3-5n = 2m - 2n - 3 Solve the following equations (a) 5(3h-8)+2=7 15h - 40 + 2 = 7 15h = 45 h = 3 (b) 3(7-2k)+4=-11 21 - 6k + 4 = -11 6k = 36 k = 6 (c) e/4+6=e 3e/4 = 6 3e = 24 e = 8 (d) 八份三f+3=八份七f-5 3f/8 + 3 = 7f/8 - 5 4f/8 = 8 f/2 = 8 f = 16 Caeman's mother is now 41 years old . 5 years ago , she was 4 times as Carmen.How old is Carman now?(方程) Carmen's age = (41-5)/4 + 5 = 9 + 5 = 14 Use index notation to write 90 as a product of prime factors .(要steps) 90 = 2 x 3 x 3 x 5 = 2 x 3^2 x 5
中一maths 急急急急 急急急急急 !!!!!
此文章來自奇摩知識+如有不便請留言告知
發問:Simplife each of the following algebraic expressions(a) 6a+3-2(b) 2m+3n-3-5nSolve the following equations(a) 5(3h-8)+2=7(b) 3(7-2k)+4=-11(c) e/4+6=e(d) 八份三f+3=八份七f-5Caeman's mother is now 41 years old . 5 years ago , she was 4 times as Carmen.How old is Carman... 顯示更多 Simplife each of the following algebraic expressions (a) 6a+3-2 (b) 2m+3n-3-5n Solve the following equations (a) 5(3h-8)+2=7 (b) 3(7-2k)+4=-11 (c) e/4+6=e (d) 八份三f+3=八份七f-5 Caeman's mother is now 41 years old . 5 years ago , she was 4 times as Carmen.How old is Carman now?(方程) Use index notation to write 90 as a product of prime factors .(要steps)
最佳解答:
(a) 6a+3-2 = 6a + ( 3 - 2 ) = 6a + 1 (b) 2m+3n-3-5n = 2m + ( 3n - 5n ) - 3 = 2m + ( -2n ) - 3 = 2m - 2n - 3 Solve the following equations (a) 5(3h-8)+2=7 15h - 40 + 2 = 7 15h - 38 = 7 15h - 38 + 38 = 7 + 38 15h = 45 15h ÷ 15 = 45 ÷ 15 h = 3 (b) 3(7-2k)+4=-11 21 - 6k + 4 = -11 25 - 6k = -11 25 - 6k - 25 = -11 - 25 -6k = -36 6k = 36 6k ÷ 6 = 36 ÷ 6 k = 6 (c) e/4+6=e e ÷ 4 + 6 = e 4 ( e ÷ 4 + 6 ) = 4e e + 24 = 4e e + 24 - e = 4e - e 24 = 3e 24 ÷ 3 = 3e ÷ 3 8 = e e = 8 (d) 八份三f+3=八份七f-5 有兩 Case , Case 1 : ( 3 ÷ 8 ) × ( f + 3 ) = ( 7 ÷ 8 ) × ( f - 5 ) 8 ( 3 ÷ 8 ) × ( f + 3 ) = 8 ( 7 ÷ 8 ) × ( f - 5 ) 3 ( f + 3 ) = 8 ( f - 5 ) 3f + 9 = 8f - 40 3f + 9 - 3f = 8f - 40 - 3f 9 = 5f - 40 9 + 40 = 5f - 40 + 40 49 = 5f 49 ÷ 5 = 5f ÷ 5 9.8 = f f = 9.8 Case 2 : ( 3 ÷ 8 ) f + 3 = ( 7 ÷ 8 ) f - 5 8 [ ( 3 ÷ 8 ) f + 3 ] = 8 [ ( 7 ÷ 8 ) f - 5 ] 3f + 24 = 7f - 40 3f + 24 - 3f = 7f - 40 - 3f 24 = 4f - 40 24 + 40 = 4f - 40 + 40 64 = 4f 64 ÷ 4 = 4f ÷ 4 16 = f f = 16 Carman's mother is now 41 years old . 5 years ago , she was 4 times as Carmen.How old is Carman now?(方程) Let Carman is x years old now 4 ( x - 5 ) = 41 - 5 4x - 20 = 36 4x - 20 + 20 = 36 + 20 4x = 56 4x ÷ 4 = 56 ÷ 4 x = 13 Carman is 13 years old now . Use index notation to write 90 as a product of prime factors .(要steps) 90 = 2 × 45 = 2 × 5 × 9 = 2 × 5 × 3 × 3 = 2 × 5 × 3^2 = 2 × 3^2 × 5
其他解答:
(a) 6a+3-2 =6a+(3-2) =6a+1 (b) 2m+3n-3-5n =2m+3n-5n-3 =2m-2n-3 (a)5(3h-8)+2=7 15h-40+2=7 15h=45 h=3 write these first, answer later|||||(a) 6a+3-2 = 6a + 1 (b) 2m+3n-3-5n = 2m - 2n - 3 Solve the following equations (a) 5(3h-8)+2=7 15h - 40 + 2 = 7 15h = 45 h = 3 (b) 3(7-2k)+4=-11 21 - 6k + 4 = -11 6k = 36 k = 6 (c) e/4+6=e 3e/4 = 6 3e = 24 e = 8 (d) 八份三f+3=八份七f-5 3f/8 + 3 = 7f/8 - 5 4f/8 = 8 f/2 = 8 f = 16 Caeman's mother is now 41 years old . 5 years ago , she was 4 times as Carmen.How old is Carman now?(方程) Carmen's age = (41-5)/4 + 5 = 9 + 5 = 14 Use index notation to write 90 as a product of prime factors .(要steps) 90 = 2 x 3 x 3 x 5 = 2 x 3^2 x 5
文章標籤
全站熱搜
留言列表
