Jordan said 60% of 150 people is 80 people. His work is shown below. Is his answer correct? Explain why or why not.60% of 150 = 10% + 50% = 5 + 75 = 80

Sample response

Step-by-step explanation:

No, his answer is not correct. Jordan incorrectly found that 10% of 150 is 5. 10% of 150 is 150 ÷ 10 = 15. 50% of 150 is 75. 10% + 50% = 15 + 75 = 90. The correct answer is 90 people.

14.29%

step-by-step explanation:

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -