All categories

3 years ago

How many solutions does the system of equations have y=5x+7 and 3y-15x=18

Mathematics

2 answers:

spayn [35]3 years ago

6 0

Hello there.

How many solutions does the system of equations have y=5x+7 and 3y-15x=18

B two

Digiron [165]3 years ago

3 0

Answer:

the answer to the problem is d.

You might be interested in

X squared+ y squared = 2 y = 2x squared – 3 Which of the following describes the system?

cluponka [151]

Answer:

$x=-1,1,-\sqrt{\frac{7}{4} },\sqrt{\frac{7}{4}}$ and $y=-1,\frac{1}{2}$

The ordered pair solutions are $(-\sqrt{\frac{7}{4}},0.5)$ , $(\sqrt{\frac{7}{4}},0.5)$ , $(-1,-1)$ , and $(1,-1)$ .

Step-by-step explanation:

I'm assuming the system is $\left \{ {x^2+y^2=2} \atop {y=2x^2-3}} \right.$ :

$x^2+y^2=2$

$x^2+(2x^2-3)^2=2$

$x^2+(4x^4-12x^2+9)=2$

$x^2+4x^4-12x^2+9=2$

$4x^4-11x^2+9=2$

$4x^4-11x^2+7=0$

$x^4-11x^2+28=0$

$(x^2-7)(x^2-4)=0$

$(4x^2-7)(x^2-1)=0$

$4x^2-7=0$

$4x^2=7$

$x^2=\frac{7}{4}$

$x=\pm\sqrt{\frac{7}{4}}$

$x^2-1=0$

$x^2=1$

$x=\pm1$

$y=2x^2-3$

$y=2(\pm\sqrt{\frac{7}{4}})^2-3$

$y=2({\frac{7}{4}})-3$

$y=\frac{7}{2}-3$

$y=\frac{1}{2}$

$y=2x^2-3$

$y=2(\pm1)^2-3$

$y=2(1)-3$

$y=2-3$

$y=-1$

Therefore, $x=-1,1,-\sqrt{\frac{7}{4} },\sqrt{\frac{7}{4}}$ and $y=-1,\frac{1}{2}$

The ordered pair solutions are $(-\sqrt{\frac{7}{4}},0.5)$ , $(\sqrt{\frac{7}{4}},0.5)$ , $(-1,-1)$ , and $(1,-1)$ .

4 0

2 years ago

Translate this sentence into an equation.

motikmotik

Answer:

g = 61.

Step-by-step explanation:

g + 9 = 70 Subtract 9 from both sides of the equation:

g + 9 - 9 = 70 - 9

g = 61.

4 0

3 years ago

a country's population in 1991 was 48 million in 2002 it was 51 million estimate the population in 2008 using the expotential gr

Dvinal [7]

one approach first write the formula substitute what you are given to find the rate you have the initial amount and the amount after a specified time do you see that it changed by (51 -48) millions in a period of (1997-1990) years using this rate with the new time (2017-1997) years and the new initial amount 51 million plug into the formula to find the new amount. Round your answer to the nearest million. the amount is calculated in millions. use the nearest whole number.

8 0

3 years ago

M/9+2/3=7/3 Solve for m.

Aleks04 [339]

M/9+2/3=7/3
M/9 =7/3 - 2/3
M/9 = 5/3
M = 5/3 x 9
M = 15

3 0

3 years ago

50 POINTS IF YOU ANSWER CORRECTLY!

melisa1 [442]

Answer:

Problem 4: Option C, 32

Problem 5: You need to have the 2 and the x combine. Make the table 2x than 16.

Problem 6: x = 17

Problem 7: She drew a 2, x and an 16. Instead you must have 2x and 16. 2x + 16 = 50

Step-by-step explanation:

Problem 4

2 + x + 16 = 50

x + 18 - 18 = 50 - 18

x = 32

Answer: Option C, 32

Problem 5

You need to have the 2 and the x combine. Make the table 2x than 16.

Answer: You need to have the 2 and the x combine. Make the table 2x than 16.

Problem 6

2x + 16 - 16 = 50 - 16

2x / 2 = 34 / 2

x = 17

Answer: x = 17

Problem 7

She drew a 2, x and an 16. Instead you must have 2x and 16. 2x + 16 = 50

Answer: She drew a 2, x and an 16. Instead you must have 2x and 16. 2x + 16 = 50

4 0

3 years ago

Read 2 more answers