All categories

3 years ago

3x - 5y = 4, -2x + 6y = 18 (system of equations)

Mathematics

2 answers:

Jet001 [13]3 years ago

8 0

Answer:

Step-by-step explanation:

-5y=4-3x

y=(4/-5)-(3/-5x)

2x+6y=18

6y=18-2x

y=18/6-(2/6x)

y=y

(4/-5)-(3/-5x)=18/6-(2/6x)

0.93x=3.8

x=3.8/0.93

x=4.09

sub 4.09 for the 3x-5y=4

which will give you y=1.65

sub 4.09 for -2x+6y=18

which will give you y=4.36

jok3333 [9.3K]3 years ago

3 0

Answer:

(x, y) = (57/4, 31/4)

Step-by-step explanation:

-2x + 6y = 18

-2x = 18 - 6y

x = -9 + 3y

3(-9 + 3y) - 5y = 4

-27 + 9y - 5y = 4

4y = 31

y = 31/4

x = -9 + 3(31/4) = 57/4

You might be interested in

mina [271]

Answer:

Step-by-step explanation:

A. 2 meters to centimeters

1 m = 100 cm

$2 m = 2 \times 100 \\2 m = 200 cm = 2 \times 10^2$

B)108 centimeters to meters

100 cm =1 m

$1 cm = \frac{1}{100} m \\108 cm = \frac{108}{100}=108 \times 10^{-2} m$

C)2.49 meters to centimeters

1 m = 100 cm

$2.49 m = 2.49 \times 100 = \frac{249}{100} \times 100 = 249 cm$

D)50 centimeters to meters

100 cm = 1m

$1 cm = \frac{1}{100} m \\50 cm = \frac{50}{100}= 5 \times 10^{-1} m$

E)6.3 meters to centimeters

1 m = 100 cm

$6.3 m = 6.3 \times 100=\frac{63}{10} \times 100 = 630 cm$

F)7 centimeters to meters

100 cm = 1 m

$1 cm = \frac{1}{100} m\\\\7 cm = \frac{7}{100} = 7 \times 10^{-2} m$

a)4 meters to millimeters

1 m = 1000 mm

$4 m = 4000 = 4 \times 10^3 mm$

b)1.7 meters to millimeters

1 m = 1000 mm

$1.7 m = 1.7 \times 1000= \frac{17}{10} \times 1000=17 \times 10^2 mm$

3 0

3 years ago

A student can pitch a fast ball at 65 miles per hour. Convert this

AnnyKZ [126]

Answer:

31.77 yd/sec

Step-by-step explanation:

<u>Conversions:</u>

1 mile = 1760 yards
1 hour = 3600 seconds

<u>Given:</u>

$\sf 65\:miles\:per\:hour=65\:miles/hour=\dfrac{65\:miles}{hour}$

Therefore, to convert 65 mph to yards per second:

$\implies \sf \dfrac{65\:miles}{hour}=\dfrac{65 \times 1760\:yards}{3600\:seconds}=31.777...\:yd/s$

6 0

1 year ago

Read 2 more answers

Suppose that market demand for a good is q = 480 - 2p. the marginal cost is mc = 2q.

Lynna [10]

Answer:

1 is the most of all uruhrhrhrhdhhfv gdhgrjduyrbbcfdjhccbfmhf

5 0

2 years ago

I need help cause I got a b- in math

anygoal [31]

Answer:

2a plus 3/4b

Step-by-step explanation:

First distribute the fractions.

Second communitate variable a.

Third communitate variable b.

Finally simplify.

8 0

3 years ago

The surface area of a rectangular prism

Alexxandr [17]

Rectangular prism and cuboid are same

5 0

2 years ago