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Yanka [14]
2 years ago
8

Four friends each fipped a coin different numbers of times.

Mathematics
1 answer:
Gelneren [198K]2 years ago
4 0

Answer:

Sarah

Step-by-step explanation:

Alice: 75%

Mary: 80%

Sarah: 85%

Ellen: 60%

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Will give brainliest. Explain in detail please!
Zina [86]

Answer:

p < -28

Step-by-step explanation:

This is a simple solve - all we have to do is treat it like a normal equation and solve for p.  This involves only one step - subtract 4 from both sides.  We now end up with p < -28.  And there you are!

8 0
2 years ago
Read 2 more answers
Require help with this question
user100 [1]
A) There are a number of ways to compute the determinant of a 3x3 matrix. Since k is on the bottom row, it is convenient to compute the cofactors of the numbers on the bottom row. Then the determinant is ...
  1×(2×-1 -3×1) -k×(3×-1 -2×1) +2×(3×3 -2×2) = 5 -5k

bi) Π₁ can be written using r = (x, y, z).
  Π₁ ⇒ 3x +2y +z = 4

bii) The cross product of the coefficients of λ and μ will give the normal to the plane. The dot-product of that with the constant vector will give the desired constant.
  Π₂ ⇒ ((1, 0, 2)×(1, -1, -1))•(x, y, z) = ((1, 0, 2)×(1, -1, -1))•(1, 2, 3)
  Π₂ ⇒ 2x +3y -z = 5

c) If the three planes form a sheath, the ranks of their coefficient matrix and that of the augmented matrix must be 2. That is, the determinant must be zero. The value of k that makes the determinant zero is found in part (a) to be -1.

A common approach to determining the rank of a matrix is to reduce it to row echelon form. Then the number of independent rows becomes obvious. (It is the number of non-zero rows.) This form for k=-1 is shown in the picture.

5 0
3 years ago
Which descriptions from the list below accurately describe the relationship
Pachacha [2.7K]

Answer:

B is the answer

Step-by-step explanation:

8 0
2 years ago
Question 3<br> (-4)² =<br> How can I solve this
slava [35]
(-4)^2
A negative base raised to an even power gives us a positive so
4^2
4x4=16
4 0
3 years ago
Read 2 more answers
Hello I need help on this math question ignore the circled answer just give me the correct answer thankyou :)
Anna71 [15]

Answer:

Option C is correct...hope this helps:)

3 0
1 year ago
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