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saul85 [17]
3 years ago
5

Help me with question 32

Mathematics
2 answers:
Kipish [7]3 years ago
8 0
The answer is H i am possibly sure it is
4vir4ik [10]3 years ago
4 0
Line 1 has slope of 1 and y-intercept at 4
line 1 equation in y = mx + b form: y = x + 4

line 2 has slope of -1/2 and y-intercept of 1
you can calculate this using slope formula or count rise/run to get to next point:
like line 2 has points (-2, 2) and (0,1)

so slope = (1 - 2)/(0 - (-2) ) = -1/2

line 2 has y=mx+b form of y = -1/2x + 1

try to convert all the systems into y=mx+b form and see if they get our equations for lines 1 and 2:

line 1: y = x + 4
line 2: y = -1/2x + 1

for system F

4x + 2y = -18
2x - 2y = 9

if we try changing 4x + 2y = -18 to isolate y:

4x + 2y = -18
2y = -4x - 18
y = -4/2x - 18/2
y = -2x - 9

this choice is wrong since none of our slopes are 2

try system G:
2x + 4y = 6
-2x + 2y = 4

if we try changing 2x + 4y = 6 to isolate y

2x + 4y = 6
4y = -2x + 6
y = -2/4x + 6/4
y = -1/2x + 3/2

the graphs don't have y-intercept at 3/2 so this is wrong

try system H:
2x + 4y = 4
-2x + 2y = 8

if we try converting 2x + 4y = 4 we get

2x + 4y = 4
4y = -2x + 4
y = -2/4 x + 4/4
y = -1/2x + 1

This matches with line 2: y = -1/2x + 1 so try converting the other equation in this system to see if this is the right answer

-2x + 2y = 8
2y = 2x + 8
y = 2/2x + 8/2
y = x + 4

So H is the answer
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After solving for both variables, you find that each bus can hold 59 students and each van can hold 18 students.

Step-by-step explanation:

You can find the amount of students each vehicle can carry by representing the two scenarios in equations.

You are trying to find how many students will fit in each bus or van, so the two variables used will be "b" to represent how many students can fit in a bus and "v" to represent how many students can fit in a van.

High school A used 1 van and 6 buses, so there will be 1"v" and 6"b" for 372 students.

High school B used 4 vans and 12 buses, so there will be 4"v" and 12"b" for 780 students.

Now, represent these in equations:

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We can use substitution to solve this system:

v + 6b = 372 can be rewritten as v = 372 - 6b after subtracting 6b from both sides. You can then substitute this new value of "v" into the other equation to solve for "b":

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After solving for b, you can then substitute the new value of b into the other equation to find the value of v:

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