1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Arturiano [62]
2 years ago
13

Cramers rulehurry up plzzz​

Mathematics
1 answer:
olya-2409 [2.1K]2 years ago
6 0

Answer:

Answers provided below

Step-by-step explanation:

From the simultaneous linear equation, we have the coefficient matrix as;

(3 4 5)

(2 -1 8)

(5 -2 7)

The x-matrix is Dx is given by;

(18 4 5)

(13 -1 8)

(20 -2 7)

Similarly, the y-matrix Dy is given by;

(3 18 5)

(2 13 8)

(5 -20 7)

Also,the z-matrix Dz is given by;

(3 4 18)

(2 -1 13)

(5 -2 -20)

Determinant of the coefficient matrix from online determinant calculator is;

D = 136

Determinant of the x-matrix from online determinant calculator is; Dx = 92

Determinant of the y-matrix from online determinant calculator is; Dy = 696

Determinant of the z-matrix from online determinant calculator is; Dz = 576

From crammers rule;

x = Dx/D = 92/136

y = Dy/D = 696/136

z = Dz/D = 576/136

You might be interested in
Write 3.25x 10 4 as an ordainsry number
Alik [6]

Answer:

3.25×10⁴

..................

4 0
3 years ago
Read 2 more answers
Assume $20,000 is deposited into a savings account. Bedford Bank offers an annual rate of 1% simple interest for five years. Sli
lozanna [386]
Using a savings interest calculator, I found that either way your savings grow by exactly $1,020.20, so they share the same interest.
7 0
3 years ago
F(x) = <img src="https://tex.z-dn.net/?f=%5Csqrt%7Bx%2B7%7D%20-%5Csqrt%7Bx%5E2%2B2x-15%7D" id="TexFormula1" title="\sqrt{x+7} -\
elena-s [515]

Answer:

x >= -7  ................(1a)

x >= 3   ...............(2a1)

Step-by-step explanation:

f(x) =  \sqrt{x+7}-\sqrt{x^2+2x-15}  .............(0)

find the domain.

To find the (real) domain, we need to ensure that each term remains a real number.

which means the following conditions must be met

x+7 >= 0  .....................(1)

AND

x^2+2x-15 >= 0 ..........(2)

To satisfy (1),  x >= -7  .....................(1a) by transposition of (1)

To satisfy (2), we need first to find the roots of (2)

factor (2)

(x+5)(x-3) >= 0

This implis

(x+5) >= 0 AND (x-3) >= 0.....................(2a)

OR

(x+5) <= 0 AND (x-3) <= 0 ...................(2b)

(2a) is satisfied with x >= 3   ...............(2a1)

(2b) is satisfied with x <= -5 ................(2b1)

Combine the conditions (1a), (2a1), and (2b1),

x >= -7  ................(1a)

AND

(

x >= 3   ...............(2a1)

OR

x <= -5 ................(2b1)

)

which expands to

(1a) and (2a1)   OR  (1a) and (2b1)

( x >= -7 and x >= 3 )  OR ( x >= -7 and x <= -5 )

Simplifying, we have

x >= 3  OR ( -7 <= x <= -5 )

Referring to attached figure, the domain is indicated in dark (purple), the red-brown and white regions satisfiy only one of the two conditions.

3 0
3 years ago
Read 2 more answers
The perimeter of an isosceles triangle less than 20 inches. If the base is 5 inches, what is the maximum length of each of the l
ser-zykov [4K]

Answer:

7.5 inches

Step-by-step explanation:

take the 5 away from the 20, you have 15 inches left. Isosceles triangles have two equal sides; 15 divided into two equally is 7.5

4 0
2 years ago
Anybody down to help?
vova2212 [387]

Answer:

A to D E to B C to F F to 216

This ez

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Other questions:
  • Calculate the quotient and remainder of –1 divided by 3.
    13·1 answer
  • I need help figuring out how 3(3) + 18 divided by 3(3) = 27
    5·1 answer
  • Mr. and Mrs. Jones plan on retiring on 70 percent of their pre-retirement earnings. If they earned $47,000 the last year before
    8·2 answers
  • The length and width of a rectangular room are measured to be 3.955±0.005m. Calculate the area of the room and its uncertainty i
    8·1 answer
  • The base of f(x)=2^x is
    14·1 answer
  • Find the surface area of the pyramid below. You do not need to include units. 8 cm 5 cm
    6·2 answers
  • Pls hurry I need an instant answer ASAP! Thank you
    9·1 answer
  • Triangle TUV is dilated by a scale factor of 5 to form triangle T'U'V'. Side VT
    5·2 answers
  • A-AAS<br> B-ASA<br> C-HL<br> D-SAS<br> E-SSS<br> F-Not congruent
    11·1 answer
  • What's 5.1 x 10^0 in standard notation? plz I meed it for my math class ​
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!