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QveST [7]
4 years ago
15

Using substitution or elimination 9x+3y=-7 y=-3x+4

Mathematics
2 answers:
-Dominant- [34]4 years ago
7 0

Answer:

No solution

Step-by-step explanation:

If we substitute the y into the equation, we get 9x+3(-3x+4)=-7

If we distribute the 3, we get 9x-9x+12=-7

This then cancels out both 9x's and we are left with 12=-7, making it no solution.

lozanna [386]4 years ago
3 0

Answer:

No solution

Step-by-step explanation:

Plug in y=-3x+4 into 9x+3y=-7

9x+3(-3x+4)=-7 Distribute the 3

9x - 9x + 12 =-7 Combine like terms

12 =-7 This statement isn't true. Therefore this is system of has no solution. The lines do not intersect.

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the total number of cupcakes carmen can bake depends on the amount of time she spends baking. Carmen can back 84 cupcakes in 1.6
Leto [7]
84 cupcakes    
----------       =  divide top and bottom by 1.6=  52.5 cupcakes/1 hour  
1.6 hours

so if she can bake 52.5 cupcakes in 1 hours,
multiply by 2 to get 105 cupcakes in 2 hours.
7 0
4 years ago
rob wants to buy a piglet that normally cost $200 it is on sale for currently $58 . what is the percentage discount
Paladinen [302]

Answer:

71%

Step-by-step explanation:

Firstly, 200 - 58 = 142

Next, 142 / 200 = 0.71

0.71 x 100 = 71%

3 0
3 years ago
What is the equation of a line that is paralle to 2x+3y=3 and passes through the point (3,-4)​
Bad White [126]

ANSWER

y =  -  \frac{2}{3}x - 2

EXPLANATION

The given line is

2x+3y=3

Solve for y,

y =  -  \frac{2}{3} x + 1

The slope of this line is

m =  -  \frac{2}{3}

The line that is parallel to this line also has slope,

m =  -  \frac{2}{3}

Since the line passes through (3,-4),

We can use the slope intercept formula,

y-y_1=m(x-x_1)

We substitute the slope and the point to obtain,

y + 4 = -   \frac{2}{3}(x - 3)

y =  -  \frac{2}{3} x + 2 - 4

y =  -  \frac{2}{3}x - 2

8 0
4 years ago
Read 2 more answers
Find the perimeter of the shape below:
Elden [556K]

Answer:

13.4 units

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Casey boards a Ferris wheel at the 3-o'clock position and rides the Ferris wheel for multiple revolutions. The Ferris wheel rota
DochEvi [55]

Solution :

It is given that :

Casey boarded a Ferry wheel at position of 3 'o' clock.

The angular speed of the Ferry wheel = 5.6 radians per minute

The radius of the Ferry wheel = 50 feet

The height of the center wheel of the Ferry from the ground = 55 feet

Let the number of minutes be = t

a). The expression of the varying number of radians θ is given by :

After t minutes,  θ = angle swept

                           θ = 5.6 t radians

b). Finding the height from the center of the wheel.

We know that : y = r sin θ

Given r = 50 feet

So, y = 50 sin (5.6 t) feet

Therefore, the height above the ground can be found by :

h = y + 55 (from ground)

h = 50 sin (5.6 t) + 55   feet

5 0
3 years ago
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