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Vikentia [17]
4 years ago
7

Evaluate the determinant for the following matrix: [-5 1, 1 4]

Mathematics
2 answers:
MrRissso [65]4 years ago
4 0
The matrix given is \left[\begin{array}{ccc}-5&1\\1&4\end{array}\right]

To find determinant \left[\begin{array}{ccc}a&b\\c&d\end{array}\right] we do ad-bc

So, the determinant of the given matrix is
(-5)(4)-(1)(4) = -20 - 4 = -24
nalin [4]4 years ago
3 0

Answer: -24

Step-by-step explanation:

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Rewrite the difference of 8 and 9 as an addition problem. 9 + 8 9 + (-8) 8 + (-9) 8 – (-9)
Naily [24]

Answer:

9+(-8)

Step-by-step explanation:

8-(-9) is subtraction

9+8 would not give you a difference

8+(-9) would give you a negative number

so 9+(-8) is the right answer

6 0
4 years ago
2/3x+5=1 what is the solution to the equation shown?
Fudgin [204]

Answer:

x = - 6

Step-by-step explanation:

Given

\frac{2}{3} x + 5 = 1 ( subtract 5 from both sides )

\frac{2}{3} x = - 4

Multiply both sides by 3 to clear the fraction

2x = - 12 ( divide both sides by 2 )

x = - 6

7 0
4 years ago
Read 2 more answers
Rewrite the square-root expression as an imaginary number: sqrt of -64<br><br> is it 8i?
IceJOKER [234]
The answer is 8i.

i = √(-1)

√(-64) = √((-1) * 64)
           = √(-1) * √64
           = i * √8²
           = i * 8
           = 8i
6 0
4 years ago
Read 2 more answers
The radius of a circle is increased by 3 in., which increases the area by 100 in. Find the radius of the original circle. Round
Licemer1 [7]

Answer:

3.81 inches

Step-by-step explanation:

πr² + 100 = π(r+3)²

divide by π and simplify:

r² + (100/π) = r² + 6r + 9

100/π = r² + 6r + 9

31.8309886184 - 9 = r² +6r

r² = 6r - 22.8309886184

0 = 6r - 22.8309886184

22.8309886184 = 6r

divide by 6:

3.80516476973 ≈ 3.81 inches

6 0
3 years ago
Please and thank you for helping me!
Mashcka [7]

Answer:

148 R 0

Step-by-step explanation:

7 0
3 years ago
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