2) 3 , 5 , 7. 3 times 5 (which is the second number in the sequence) is 15 and 5 times 3 (which is the first number in the sequence) is 15.

3) You do the distance divided by the speed, which is

200/70 = 3 hours and 26 minutes.

4) -5-2(3x-4)=22

First you expand the brackets (you multiply the numbers outside the brackets with the ones inside the brackets. E.g. -5 times 3 is equal to -15x and and -5 times -4 is equal to +20 because you “cancel out” the negative sign and so on.)

–> -15x + 20 – 6x + 8 = 22

Then you take all the “x” numbers to one side and the numbers to the other side. It’s better if you put the “x” numbers in the right side so u can get rid of the negative sign.

–> 20 + 8 – 22 = 15x + 6x

Then you just simplify

–> 6 = 21x

So

–> x = 21/6

Answer

–> x = 3.5

5) 4(7-2x)=-10x-2

First you expand the brackets (you multiply the numbers outside the brackets with the ones inside the brackets. E.g. 4 times 7 is equal to 28 and 4 times – 2x is equal to -8x so on..)

–> 28 – 8x = -10x – 2

This time you keep the “x” numbers in the left side sothat u wont get a negative number when u subtract 8 from 10 in the end. It’s better if u always try and keep “x” a positive number)

–> 10x – 8x = -28 – 2

Simplify

–> 2x = -30

So

–> x = -30/2

Answer

–> x = -15

6) The price of one pencil is $0.75 and the price of one pen is $1.50. If you try it out you’ll see that 10 times $0.75 is $5 and 5 times $1.50 is $7.50 again. If you add those two answers you get $15.

7) You just need to guess a little here.. I just kept guessing a few consecutive odd integers and found these 3.

–> 15, 17, 19.

Twice 15 is 30 plus 19 is 49!

Answer

–> 15, 17, 19.

Hope this helps!!! (you shouldn’t ask for help in the future though coz u’ll get nowhere…)

1) 2x+5=100

3) 200/70

5)

4(7-2x)=10x-2

28 -8x = 10x-2

28-2-8x = 10x

26 = 2x

13 = x

6) 2P = 1B & 15=10P (they only want the equations, they don’t want you to solve. it’s a trick question