8th Grade Algebra: Answer Check

Find the length of the 3rd side of each right triangle.

1. 8^2+15^2=c^2 Answer: c=17

2. 5^2+b^2=13^2 Answer: b=12

3. 9^2+13^2=c^2 Answer: c~15.81

Simplify. Assume that all variables are nonnegative.

{ this means square root

4. {12 Answer: 2{3

5. 2{75 Answer: 10{3

6. -3{72 Answer: -18{2

7. {200 Answer: 10{2

8. {3x^2 Answer: 3x

9. {3{18 Answer: 3{6

10. {5{10 Answer: 5{2

11. {15{6 Answer: 3{10

12. {3{27 Answer: 9

13. {18{14x Answer: 6{7x

14. {12{18 Answer: 6{6

15. {2/{5 Answer: {10/5

16. {75/{15 Answer: {5

17. 2/{2 Answer: {2

18. {9/{100 Answer: 3/10

19. -{49/{100 Answer: -7/10

20. {27/{75 Answer 3/5

If I get any of these wrong, can someone please show me how to them correctly ?

  1. 0
asked by Joy
  1. good job, I agree with all of them

    posted by Reiny
  2. 1,2,3,4,5,6,7 are ok.
    8. sqrt (3x^2) = x*sqrt(3) Check that.
    9,10,11 ok.
    sqrt(3)*sqrt(27) = sqrt 3*sqrt(3*9)
    9*sqrt(9) = 9*3= 27. Check that.

    check 15. I think you just wrote it wrong. I get 1/5*sqrt(10). Check that.
    The others look ok.

    posted by DrBob222
  3. I goofed on 12. It's ok.

    posted by DrBob222
  4. Thank you both!

    posted by Joy
  5. I agree with DrBob

    I should have checked them a bit less superficially.

    posted by Reiny

Respond to this Question

First Name

Your Response

Similar Questions

  1. Algebra

    The perimeter of an equilateral triangle is 7 in. more than the perimeter of a square. The side of the triangle is 5 in. longer than the side of the square. Find the length of each side of the triangle. (Note: An equilateral
  2. math

    One leg of a right triangle is one less than twice the other. The area of the triangle is 18 square feet. What is the length of the 3rd side of the triangle? Solve by factoring. A= 1/2 (b)(h) 18= 1/2 (x)(2x-1)
  3. math

    i have trouble finding the answer to this and how to srt. there is a square and i havbe to find the area. HOweever inside the square is a triangle. the base of the triangle is 3 and the leg is 7. no height is given. plz help. Is

    Could somebody help me I don't understand any of this. Could someone show me or tell me how to work the problems? 1. Find the length of the hypotenuse of a right triangle with the legs of 9cm and 12cm A.8 B.21 C.15 D.225 2.The
  5. Algebra

    b=2, c+ sqrt of 13. Trying to find the length of the 3rd side. It is a right triangle with A on top, 2 on the right side and the sqrt of 13 on the left.
  6. algebra

    A triangle has a perimeter of 161 miles. The length of each of the two shorter sides of the triangle is two thirds the length of the longest side. Find the length of each side of the triangle.
  7. Trig

    The lengths of segments PQ and PR are 8 inches and 5 inches, respectively, and they make a 60-degree angle at P. (a) Find the area of triangle PQR. (b) Find the length of the projection of segment PQ onto segment PR. (c) Find the
  8. Algebra 1

    1) Find the possible values of a, if the distance between the points is 5, and the coordinates are (1, 1) and (4, a). I don't know how to solve this one. 2) in a right triangle the length of the hypotenuse is 14 and the length b
  9. algibra1

    One side of the triangle is twice as long as the second side. The remaining side is 4cm greater than the second side. The perimeter of the triangle is 24cm.Find the length of each side of the triangle.
  10. A Geometry ?

    Given that two sides of a triangle are 20 and 66. Find the range of possible measures for the third side, s. a. 20

More Similar Questions