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krok68 [10]
3 years ago
6

Answer to question 9

Mathematics
1 answer:
olganol [36]3 years ago
7 0
The answers i. 14 ii. 28 ii. 42
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Kinda want to cry right now.. Someone PLEASE help me.. I know there is someone out there smart enough.... 25 points and Brainlie
Svetlanka [38]

Answer:

a) Infinite solutions

b) No solutions

Step-by-step explanation:

First, know the following:

If the graphs intersect, there's only one solution.

If the graphs are parallel, there are no solutions.

If the graphs are the exact same line, there are infinite solutions.

For a):

Change the first equation into a linear one.

  • 2x+3y=6
  • 3y=-2x+6
  • y=-\frac{2}{3} x+2

Change the second equation into a linear one.

  • 4x+6y=12
  • 6y=-4x+12
  • y=-\frac{2}{3} x+2

Boom. You have two equations which are equal. As stated above, graphs on the exact same line have infinite solutions.

For b)

They are already in linear form so hurray.

y=\frac{1}{5} x+2\\y=\frac{1}{5} x+10\\

These lines are parallel since they have the SAME slope but a different y-intercept. As stated above, parallel lines have no solutions.

5 0
3 years ago
A car drives 195 miles in 3 hours and 15 minutes. what is the average speed of the car?
g100num [7]
1 mpm or 0.0166666666 repeating mph
5 0
3 years ago
In the equation y = -6x + 2, what is the value of slope?<br> 25 Points!!!!!!!
zepelin [54]

Answer:

-6

Step-by-step explanation:

In y = mx + c,

m is the slope

y = -6x + 2

m = -6

5 0
3 years ago
Read 2 more answers
One angle of an isosceles triangle measures 100°. Which other angles could be in that isosceles triangle? Choose all that apply.
Ivenika [448]

Answer:

40 degrees

Step-by-step explanation:

The sum of the angles is 180.

A 100 degree angle cannot be a base angle because then

the sum of the base angles would be 200 degrees.

The 100 must be the vertex angle.

Equation:

x + x + 100 = 180

2x = 80

x = 40 degrees.

Each of the base angles is 40 degrees.

5 0
3 years ago
Evaluate the expression a+4 when a=7
melamori03 [73]

Answer:

Answer 7+4

Step-by-step explanation:

Add the 7 into a spot

4 0
3 years ago
Read 2 more answers
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