All categories

3 years ago

Use substitution or elimination to solve each system of equations y=3x X+y=4

Mathematics

2 answers:

Flauer [41]3 years ago

5 0

Answer:

(1, 3 )

Step-by-step explanation:

Given the 2 equations

y = 3x → (1)

x + y = 4 → (2)

Substitute y = 3x into (2)

x + 3x = 4, that is

4x = 4 ( divide both sides by 4 )

x = 1

Substitute x = 1 into (1) for corresponding value of y

y = 3 × 1 = 3

Solution is (1, 3 )

Sholpan [36]3 years ago

3 0

Answer:

x = 1 & y = 3

Step-by-step explanation:

y = 3x -----(1)

x + y = 4 -------(2)

sub(1)into(2)

x + 3x = 4

4x = 4

x = 1

sub x=1 into(1)

y = 3(1)

y = 3

You might be interested in

P[20,7)R(-4,-9)0(20,-9)S(-4,-24)What is the total length of the path from P to S?a.47 unitsb.55 unitsc.65 unitsd.73 units

rosijanka [135]

Given

The coordinates of the points on the path are:

P(20,7), R(-4,-9), O(20, -9), S(-4, -24)

The total length of the path from P to S is:

$=\text{ \mid PR\mid}+|RO|\text{ +}|OS|$

The distance d between two points can be found using the formula:

$d\text{ = }\sqrt{(x_2-x_1)^2\text{ +}(y_2\text{ -y}_1)^2\text{ }}$

The distance between P and R:

$\begin{gathered} |PR|\text{ = }\sqrt{(-4-20)^2\text{ +}(-9\text{ -7\rparen}^2} \\ =\text{ 28.84 units} \end{gathered}$

The distance between R and O:

$\begin{gathered} |RO|\text{ = }\sqrt{(20-(-4))^2\text{ + \lparen-9-\lparen-9\rparen\rparen}^2} \\ =\text{ 24 units} \end{gathered}$

The distance between O and S:

$undefined$

8 0

1 year ago

Bring the fraction: 8/3xy^ 2 to a denominator of 15x^2y^2

yaroslaw [1]

Answer:

40x/(15x²y²)

Step-by-step explanation:

8/(3xy²) Multiply by 5/5

= 40/(15xy²) Multiply by x/x

= 40x/(15x²y²)

8 0

3 years ago

The equation of line r is y = -12 1 2 x - 4. If line s runs perpendicular to line r and passes through (4, -3), what would be th

N76 [4]

Can you please retype the equation for line r? I don’t understand

3 0

3 years ago

Read 2 more answers

Rebecca collected data from a random sample of 1200 homeowners in her state asking whether or not they use electric heat. Based

larisa [96]

Hi,

The answer is c. The sample is biased.

This is because the sample is taken on a single state, an Rebecca reports a statistic about the nation. Her data contains information only of her state. If she lives in a very cold state, there is probably more homeowners using electric heat than in a hot state.

6 0

4 years ago

When do we use inequalities?

Softa [21]

Answer: In math but if u mean “irl” they use it in business like how much is in there inventory (stock) and the price stock they can make to get an profit and etc.

Step-by-step explanation:

7 0

3 years ago