Question

Can someone plz help me!!! 5-7?!

Answer 1

#5: d=22, #6:
`m=4\frac1{10}`, #7:
`2\frac3{11}=z`

Explanation:

#5:

`2\cdot (4\cdot5-3^2)=2\cdot (4\cdot5-3\cdot3)=2\cdot (20-9)=2\cdot11=22`

#6:

`5\frac25-1\frac3{10}=5\frac4{10}-1\frac3{10}=4\frac1{10}`

#7:

`(40-15)/(5+6)=(25)/(11)=2\frac3{11}`

Answer 2

5.
`d = 22`

6.
`m = 4(1)/(10)`

7.
`z = 2(3)/(11)`

Explanation:

5.
`d = 2 (4` ·
`5 - 3^2)`

Solving the terms inside the brackets first:

`d = 2 (20 - 9)`

`d = 2 (11)`

`d = 22`

6.
`m = 5(2)/(5) - 1(3)/(10)`

`m = (27)/(5) - (13)/(10)`

By taking LCM:

`m = (54 - 13)/(10)`

`m = (41)/(10)`

`m = 4(1)/(10)`

7.
`(40-15)/(5+6) = z`

Taking the denominator to the other side of the equation and multiplying it there:

`40 - 15 = z (5 + 6)`

`25 = 5z + 6z`

`11z = 25`

`z = (25)/(11)`

`z = 2(3)/(11)`