All categories

2 years ago

Use the matrix to solve the system of equations 5x-4y=28 7x+5y=18

Mathematics

1 answer:

KatRina [158]2 years ago

3 0

Okay so I wont be able to show the row here but I will try my best.

7(5x-4y=28) = 35x-28y=196

-5(7x+5y=18) = -35x-25y=-90

= -53y=106

= y=-2

5x-4(-2) =28

5x+8=28

5x=20

x=4

You might be interested in

PLEASE HELP THESE ARE MY ONLY POINT ;-; PLEASE

Zolol [24]

Answer:

a) max 12000 , min 0

b) no solution

c) pricing based on profit

Step-by-step explanation:

a) look at the parabola

b) there is more than one x (0)

c) the y intercepts represent his profit based on how much he priced the items at

3 0

2 years ago

Pls helpppppp this stuff makes no sense

yulyashka [42]

Answer:

x = 5

Step-by-step explanation:

a || b and a line intersecting them is their transversal.

$\therefore m\angle 1=m\angle 5\\(corresponding \:\angle 's) \\\\\therefore 60 - 2x = 70 - 4x\\\\\therefore 4x - 2x = 70 - 60\\\\\therefore 2x = 10\\\\\therefore x =\frac{10}{2} \\\\\huge \orange {\boxed {\therefore x = 5}}$

4 0

2 years ago

If the exchange rate when converting US Dollars to ZA rands is $1=R17

NikAS [45]

Answer:

200 US DOLLARS

Step-by-step explanation:

Given; $1=R17

To find: How much is Zar3400 in US DOLLARS

$1=R17

R3400=3400/17 US DOLLARS

=200 US DOLLARS

Hope my answer is right thank you.

5 0

1 year ago

Please help answer ASAP

sweet-ann [11.9K]

0.77875...

which, I'm assuming, they want you to round to the nearest hundredth? So, .78?...

6 0

2 years ago

Read 2 more answers

What is 7 devided by 215 and the reminder of it

miss Akunina [59]

30 with the remainder of 714

6 0

2 years ago