subject
Mathematics, 05.05.2021 17:20 ykluhredd

Sadie is 3 years older than Kareem, and Kareem is twice as old as Nadra. The sum of their ages is 33. A student used the steps below to find each person’s age.

Step 1 Write an equation, letting x represent Kareem’s age:
(x + 3) + x + 2 x = 33
Step 2 Solve the equation:
(x + 3) + x + 2 x = 33. 3 + 4 x = 33. 4 x = 30. x = 7 and one-half.
Step 3 Sadie is 10 and one-half, Kareem is 7 and one-half, and Nadra is 3 and three-fourths.

Which corrects the student’s first error?
In Step 1, the student should have used One-half x to represent Nadra’s age, and written the equation (x + 3) + x + one-half x = 33.
In Step 2, the student should have added 3 on both sides of the equation to find a solution of x = 9.
In Step 3, the solution represents Sadie’s age. Therefore, Sadie is 7 and one-half, Kareem is 4 and one-half, and Nadra is 2 and one-fourth.
In Step 3, Nadra’s age is the difference between 33 and Sadie’s and Kareem’s ages, so Nadra is 15.

ansver
Answers: 1

Another question on Mathematics

question
Mathematics, 21.06.2019 19:00
The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels
Answers: 2
question
Mathematics, 21.06.2019 22:30
5, 6, 10 question: a. determine whether the side lengths form a triangle. (explain your reasoning) b. if it is a triangle, determine whether it is a right, acute, or obtuse triangle. (show your work)
Answers: 1
question
Mathematics, 22.06.2019 01:00
Francis is getting new carpet tiles in his living room and den. his living room and den are connected. he needs to figure out how much carpet he needs and the cost involved. if each tile costs $2.00 per sq ft, how much would it cost to have new tile put in the den? a) $24 b) $36 c) $48 d) $54 plz awnser soon
Answers: 3
question
Mathematics, 22.06.2019 02:00
The base of a pyramid is a square with 5 lines of 5cm the slant height of each lateral face of the pyramid is 6 cm what is the surface area of the pyramid
Answers: 3
You know the right answer?
Sadie is 3 years older than Kareem, and Kareem is twice as old as Nadra. The sum of their ages is 33...
Questions
question
Physics, 25.03.2021 21:00
question
Mathematics, 25.03.2021 21:00
Questions on the website: 13722360