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Which expression is equivalent to 9(b – 7)?
Correct answer(s):
- 9b - 63
Select all expressions equivalent to 8a + 5a.
Correct answer(s):
- 13a
- (8+5)a
Which expression is equivalent to 7t + 63?
Correct answer(s):
- 7(t + 9)
Which expression is equivalent to 6(r + 1)?
Correct answer(s):
- 6r + 6
Which expression is equivalent to 5(q – 7)?
Correct answer(s):
- 5q - 35
Which expression is equivalent to 3n + 39?
Correct answer(s):
- 3(n + 13)
Which expression is equivalent to 2(m + 1)?
Correct answer(s):
- 2m + 2
Which expression is equivalent to 9(b – 7)?
Correct answer(s):
- 9b - 63
Select all expressions equivalent to 8a + 5a.
Correct answer(s):
- 13a
- (8+5)a
Decide whether the matrix [[-3, 2], [0, -1]] is invertible.
Correct answer(s):
- invertible
Find the determinant of the matrix [[3, 5], [-4, -1]].
Correct answer(s):
- 17
Decide whether the matrix [[2, -5], [-1, -4]] is invertible.
Correct answer(s):
- invertible
Decide whether the matrix [[2, -4], [2, 0]] is invertible.
Correct answer(s):
- invertible
Find the determinant of the matrix [[-4, -5], [-2, 3]].
Correct answer(s):
- -22
Decide whether the matrix [[4, 2], [0, 1]] is invertible.
Correct answer(s):
- invertible
Decide whether the matrix [[-4, 0], [-5, 5]] is invertible.
Correct answer(s):
- invertible
Find the determinant of the matrix [[2, 4], [-2, -4]].
Correct answer(s):
- 0
Decide whether the matrix [[2, 3], [-5, 4]] is invertible.
Correct answer(s):
- invertible
Decide whether the matrix [[-1, -2], [0, 3]] is invertible.
Correct answer(s):
- invertible
Find the determinant of the matrix [[-1, -2], [-2, 5]].
Correct answer(s):
- -9