There are 142 coins in a container with a total value of $20.50. If all of the coins are either quarters (x) or nickels (y), which system of equations would you use to determine how many of each type of coin are in the container? No work is needed. Immersive Reader (1 Point)

x + y = 20.50 and .25x + .05y = 142

x + y = 20.50 and .25x + .5y = 142

x + y = 142 and .25x + .5y = 20.50

x + y = 142 and .25x + .05y = 20.50

There were 200 eighth grade students who attended the Disney field trip. Some students rode in vans (v) which hold 5 students each. Some students rode in buses (b) which hold 30 students each. Each vehicle was completely full, and there were 10 total vehicles. Which is the system of equations used to calculate the number of vans and buses? No work is needed. Immersive Reader
(1 Point)

v + b = 10 and 5v + 30b = 200

v + b = 10 and 5v - 30b = 200

v + b = 200 and 5v + 30b = 10

v + b = 200 and 5v + 30b = 200

answer: 59

step-by-step explanation:

to have more of what you want like money

step-by-step explanation:

save it by not spending on unnecessary stuff and have more

a.   we have two

lines:   y = 4-x   and  

y = 8-x^-1

given two simultaneous equations that are both to be

true, then the solution is the points where the lines cross. the intersection is

where the two equations are equal. therefore the solution that works for both

equations is when

4-x = 8-x^-1

this is where the two lines will cross and that is the

common point that satisfies both equations.

b.   4-x = 8-x^-1

  x           4-x       8-x^-1

-3           7        

8.33

-2           6         8.5

-1           5         9

  0           4        

-

  1           3        

7

  2           2        

7.5

  3           1         7.67

the table shows that none of the x values from -3 to 3 is

the solution because in no case does

4-x = 8-x^-1

to find the solution we need to rearrange the equation to

find for x:

4-x = 8-x^-1

multiply both sides with x:

4x-x^2 = 8x-1

x^2+4x-1=0

x= -4.236, 0.236

therefore there are two points that satisfies the

equation.

find y:  

x=-4.236

y = 4-x   = 4 – (-4.236)

= 8.236

y = 8-x^-1 =   .236)^-1

= 8.236

x=0.236

  y = 4-x   = 4 – (0.236) = 3.764

y = 8-x^-1 =   8-(0.236)^-1

= 3.764

thus the two lines cross at 2 points:

(-4.236, 8.236) & (0.236, 3.764)

c.   to solve

graphically the equation 4-x = 8-x^-1

we would graph both lines: y = 4-x   and   y

= 8-x^-1

the point on the graph where the lines cross is the

solution to the system of equations.

just graph the points on part b on a cartesian coordinate

system and extend the two lines.   the

solution is, as stated, the point where the two lines cross on the graph.

step-by-step explanation:

mark brainliest!

hello umm i don't understand your question can you explain it more pls

step-by-step explanation: