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3 years ago

Solve the system by adding. Drag and drop numbers into the coordinates to complete the ordered pair.

Mathematics

2 answers:

Mademuasel [1]3 years ago

8 0

Answer:

(-3,5)

Step-by-step explanation:

4x + 3y = 3

x − 3y = −18

Solve by addition/Elimination

x = -3

y = 5

So,

The solution of the system is (-3,5).

HELPPP PLZZ (I got you)

Ace

jeka943 years ago

6 0

Answer: x = 4 , y = 6

Step-by-step explanation:

4 x = 3 y − 2 , 18 = 3 x + y

Solve for y

in the second equation.

Tap for more steps...

4 x = 3 y − 2 y = 18 − 3 x

Replace all occurrences of

y in 4 x = 3 y − 2

with

18 − 3 x . 4 x = 3 ( 18 − 3 x ) − 2 y = 18 − 3 x

Simplify

3 ( 18 − 3 x ) − 2

Tap for more steps...

4 x = − 9 x+ 52 y = 18 − 3 x

Move all terms in

4 x = − 9 x + 52

to the left side and simplify.

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13 x − 52 = 0 y = 18 − 3 x

Solve for x

in the first equation.

Tap for more steps...

x = 4 y = 18 − 3 x

Replace all occurrences of

x in y = 18 − 3 x

with 4 . x = 4 y = 18 − 3 ⋅ 4

Simplify

18− 3 ⋅ 4

Tap for more steps...

x = 4 y = 6

The solution to the system of equations can be represented as a point.

( 4 , 6 )

The result can be shown in multiple forms.

Point Form:

( 4 , 6 )

Equation Form:

x = 4 , y = 6

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3 0

3 years ago

1.) Use the quadratic formula to solve the equation. If necessary, round to the nearest hundredth .x squared minus 21 x equals n

Andrew [12]

Part 1
We are given $x^2-21x=-4x$ . This can be rewritten as $x^2-18x=0$ .
Therefore, a=1, b=-18, c=0.
Using the quadratic formula
$x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}=\frac{-\left(-18\right)\pm \sqrt{\left(-18\right)^2-4\left(1\right)\left(0\right)}}{2\left(1\right)}$
$x=\frac{18\pm 18}{2}$

The values of x are
$x_1=\frac{18-18}{2}=0$
$x_2=\frac{18+18}{2}=18$

Part 2
Since the values of y change drastically for every equal interval of x, the function cannot be linear. Therefore, the kind of function that best suits the given pairs is a quadratic function.

Part 3.
The first equation is $y=x^2+2$ .
The second equation is $y=3x+20$ .

We have
$x^2+2=3x+20$
$x^2-3x-18=0$
Factoring, we have
$\left(x-6\right)\left(x+3\right)=0$
Equating both factors to zero.
$x_1-6=0\rightarrow x_1=6$
$x_2+3=0\rightarrow x_2=-3$

When the value of x is 6, the value of y is
$y=3\left(6\right)+20=38$

When the value of x is -3, the value of y is
$y=3\left(-3\right)+20=11$

Therefore, the solutions are (6,38) or (-3,11)

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3 years ago

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ki77a [65]

Your answer would be D. 225%. 9/4 equals to 2.25 which multiplied but a 100 to make the percentage equals 225%.

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3 years ago

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vredina [299]

Answer:

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