Ask question

Ask question

All categories

olga nikolaevna [1]

3 years ago

15

A test has 20 questions. The test awards 3 points if the answer is correct and takes away 1 point if the answer is incorrect. A

student answered 5 questions incorrectly. How many points did the student lose?
Answers:
A. 15 Points.
B. -15 Points.
C. -5 Points.
D. 8 Points.

1 answer:

Svetradugi [14.3K]3 years ago

5 0

Answer:

C. -5

Step-by-step explanation:

20 x 3 = 60

5 x 1 = 5

60 - 5 = 55

You might be interested in

Can anyone help me with this?

Illusion [34]

Answer:

Step-by-step explanation:

5 0

3 years ago

Consider the given matrix. 1 −1 0 5 1 4 0 1 1 Find the eigenvalues. (Enter your answers as a comma-separated list.) λ = Find the

fomenos

Answer:

Step-by-step explanation:

We have to diagonalize the matrix

$\left[\begin{array}{ccc}1&-1&0\\5&1&4\\0&1&1\end{array}\right]$

we have to solve the expression

$|A-\lambda I|=0$

Thus, by applying the determinant we obtain the polynomial

$(1-\lambda )^3+5-4=0\\(1-\lambda )^3+1=0\\$

$-\lambda^3+3\lambda^2-4\lambda+2$

$\lambda_1=1\\\lambda_2=1-i\\\lambda_3=1+i\\$

and the eigenvector will be

$v_1=(-4,0,5)\\v_2=(-1,-i,-1)\\v_3=(-1,i,1)$

HOPE THIS HELPS!!

3 0

3 years ago

1 3/4 x 1 1/3 give your answer as a mixed number

WARRIOR [948]

Answer:

2 1/3

Step-by-step explanation:

1 3/4 is equivalent to 7/4

1 1/3 is equivalent to 4/3

7/ 4 x 4/3

reduce with greatest common factor so the two 4 are out (show a line crossing out the top and bottom 4 )

now you're left with 7 x 1/3 = 7/3

7/3 = 2 1/3

4 0

3 years ago

Read 2 more answers

A geometric secquence has: a3= 15 a6= 5/27; find common ratio

ss7ja [257]

Answer:

a=5 while other a is 0.03

8 0

3 years ago

Read 2 more answers

Which of the following could be the measurements of two complementary angles?

Phantasy [73]

The answer would be A, complementary angles must add up to 90 degrees

8 0

3 years ago

Read 2 more answers