algebra

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sooo confusing... 6. (¼ + 7/8)(9/13)

A81/13
B17/104
C81/104
D17/29
E17/13
F17/25

7. [6(2+1) -6(1+1)] / [6(4-2) - 22 ]

A3/2
B3/4
C3/5
D3
E1/3
F2/3

8. -3(y – 5) - (-2y + 1)

A-y +14
B5y - 4
C-5y + 14
D-13y
E-5y -6
F-y – 4

For problems 9 – 15 let a = 2, b = -4, c = 7, and d = -3.

9. Evaluate (ac + b)/a

A3
B28
C-7
D5
E11
F7

10. Evaluate b3/a + c2

A55
B81
C-18
D17
E8
F-4

11. Evaluate bc/a2 + d

A4
B-28
C3
D25
E-10
F-7/2

12. Evaluate b – a(cd + b) + a

A506
B2
C-44
D48
E-90
F52

13. Evaluate c + d[(ac + b)/(d-a)] + c

A-20
B36
C12
D52
E20
F-12

14. Evaluate (a + b)(c – d)

A-20
B36
C-12
D20
E8
F-8

15. (b + d) – (a – c)

A-12
B-5
C2
D6
E5
F-2

16. The area of a rectangle may be determined by using the formula A = lw, where "A" stands for area, "l" stands for the length of the rectangle, and "w" stands for the width of the rectangle. If the length of the rectangle is 3 cm and the width of the rectangle is 5 cm, what is the area?

A2 square cm
B5/3 square cm
C8 square cm
D15 square cm
E16 square cm
F30 square cm

17. The perimeter of a rectangle may be determined by using the formula P = 2(l + w), where "P" stands for the perimeter, "l" stands for the length of the rectangle, and "w" stands for the width of the rectangle. What is the perimeter of a rectangle with the same dimensions as the rectangle in problem 16?

A15 cm
B12 cm
C11 cm
D13 cm
E16 cm
F30 cm

18. The surface area of a rectangular prism may be determined by using the formula S = 2(lw + lh + wh), where "S" stands for surface area, "l" stands for the length of the prism, w" stands for the width of the prism, and "h" stands for the height of the prism. If the length of the prism is 2 cm, the width is 4 cm, and the height is 5 cm, what is the surface area of the prism?

A76 square cm
B270 square cm
C140 square cm
D38 square cm
E200 square cm
F50 square cm

19. The area of a triangle may be determined by using the formula A = (1/2)bh, where "A" stands for area, "b" stands for the length of the base of the triangle, and "h" stands for the height of the triangle. If the base of the triangle measures 7 cm and the height of the triangle measures 4 cm, what is the area of the triangle?

A64 square cm
B14 square cm
C28 square cm
D6 square cm
E11/2 square cm
F56 square cm

20. The area of a trapezoid may be determined by using the formula A = (h/2)(a+b), where "A" stands for area, "h" stands for the height of the trapezoid, and "a" and "b" stand for the lengths of the bases of the trapezoid. If the height of the trapezoid is12 cm, a = 2 cm and b = 4 cm, what is the area of the trapezoid?

A16 square cm
B14 square cm
C24 square cm
D9 square cm
E72 square cm
F36 square cm

  • algebra -

    We do not do your work for you. Once you have answered your questions, we will be happy to give you feedback on your work. Although it might require more time and effort, you will learn more if you do your own work. Isn't that why you go to school?

  • algebra -

    i don't go to school. i have no teachers to show me how to do it. i cant ask questions. online high school.and i wasn't wanting answers i was wanting someone to explain them to me.

  • algebra -

    In my experience, when a student wants explanation, he/she asks for explanation. If the student wants someone to give answers, only the assignment is posted with no specific questions directly from the student.

    If all you do is post your entire assignment, not much will happen since no one here will do your work for you. But if you are specific about what you don't understand about the assignment or exactly what help you need, someone might be able to assist you.

    Be sure to post exactly what kind of HELP you need.

  • algebra -

    If you want explanations, you do not post many questions of the same category, because that gives the impression that you just need the answers.

    I will work out the first one for you.

    6. (¼ + 7/8)(9/13)

    There is an implied multiplication sign between the two sets of parentheses.

    Inside of the first set of parentheses, you will need to find the common denominator and add the fractions:
    (¼ + 7/8)
    =(2/8+7/8)
    =9/8

    Now multiply the two together to get:
    (9/8)*(9/13)
    =(9*9)/(8*13)
    =81/104

    Now you should be able to work on the other problems, and post your answers for checking if you wish.

  • algebra -

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  • algebra -

    copy an past skillz!! lol

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    A dentist causes the bit of a high-speed drill to accelerate from an angular speed of 1.50 x 104 rad/s to an angular speed of 3.76 x 104 rad/s. In the process, the bit turns through 3.13 x 104 rad. Assuming a constant angular acceleration, …
  7. Science

    Express in scientific notation. Make sure your answer has the same number of significant figures as the starting value. 61,103 = _____ 6.11 x 104 6.1103 x 104 6 x 104
  8. int.science gtg in 8 min.

    How much heat is contained in 100 kg of water at 60.0 °C?
  9. physics

    An airplane of mass 1.30 104 kg is moving at 52.0 m/s. The pilot then increases the engine's thrust to 7.00 104 N. The resistive force exerted by air on the airplane has a magnitude of 3.00 104 N.
  10. Pre-Algebra

    Suppose you roll two number cubes and pick a letter of the alphabet at random. Find the probability you roll 2 even numbers and pick one of the vowels a, e, i, o, or u. A. 7/104 B. 5/104 C. 1/6 D. 1/104

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