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mina [271]
3 years ago
10

PLEASE HELP URGENT!! I DONT UNDERSTAND THIS AT ALL

Mathematics
1 answer:
vodka [1.7K]3 years ago
8 0

Answer:

1. parallel

2. no

Step-by-step explanation:

1. The lines are parallel as they have the same slope and are at different points. Parallel lines means that the 2 lines don't ever meet. It's not the same line because they have different y-intercepts, meaning they are at different points on the graph. They're not intersecting cause like I said, they have the same slope, so they are going up and at the same angle, no way they're going to intersect. And it's not perpendicular as perpendicular lines also require the lines to intersect, which they do not.

2. Plug in (4, 1) into the equation

3x + 2y = 10

3(4) + 2(-1) = 10

12 - 2 = 10

10 = 10, so yeas for this one, now do the other

-2x + y = -7

-2(4) + (-1) = -7

-8 -1 = -7

-9 ≠ -7, so no

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If P=2L+2W, solve for W.
vodka [1.7K]

Answer:

W = (P-2L)/2

Step-by-step explanation:

Isolate W

P = 2L + 2W

subtract 2L from each side

P - 2L = 2W

divide each side by 2

(P-2L)/2 = W

3 0
3 years ago
$100 for 10 hours Rick $80 for 9 hours Steve $75 for 8 hours Andy $60 for 5 hours Meg wants to take tennis lessons. In the chart
Sergio [31]

Answer:

$80 for 9 hours

Step-by-step explanation:

whichever instructor it is that does it for $80 for 9 hours.

I can't tell which rates belong to which instructor and Mark's name isn't listed by any rates......

but the $80 for 9 hours is the best deal per hour

5 0
3 years ago
The school that Scott goes to is selling tickets to a fall musical. On the first day of ticket sales the school sold 12 adult ti
harina [27]

Answer:

The price of one adult ticket = $13

The price of one student ticket = $4

Step-by-step explanation:

Let the price of 1 adult ticket = x

Let the price of 1 student ticket = y

On the first day of ticket sales the school sold 12 adult tickets and 10 student tickets for a total of $196.

12 × x + 10 × y = $196

12x + 10y = 196....... Equation 1

The school took in $59 on the second day by selling 3 adult tickets and 5 student tickets

3 × x + 5 × y = $59

3x + 5y = 59.......... Equation 2

Using Elimination method

We eliminate y, by Multiplying equation 1 by 5 and Equation 2 by 10

12x + 10y = 196....... Equation 1 × 5

3x + 5y = 59.......... Equation 2 × 10

60x + 50y = 980....... Equation 3

30x + 50y = 590......... Equation 4

Subtract Equation 4 from Equation 3

30x = 390

x = 390/30

x = $13

Therefore, the price of one adult ticket = $13

Remember: x = $13

3x + 5y = 59.......... Equation 2

Substitute

3(13) + 5y = 59

39 + 5y = 59

5y = 59 - 39

5y = 20

y = 20/5

y = $4

Therefore, the price of one student ticket = $4

8 0
3 years ago
Class 10R sat a test The mean mark for the class was 70% there are 30 students in class 10R, 20 of whom are boys the mean mark f
alexgriva [62]

Answer:

86

Step-by-step explanation:

Given that there are 30 students in class 10R and the mean marks for the entire class was 70%. Therefore, total mark of class = 70 x 30 = 2100

Given that there are 20 boys in the class and the mean marks for the boys was 62 %. Therefore, total mark of boys = 62 x 20 = 1240

To calculate the mean mark for the girls we need to find the total number of girl and total mark of girls. total number of girl = 30 - 20 (boys) = 10 total mark of girls = total mark of class -  total mark of boys = 2100 - 1240 = 860 mean mark for girls = 860 / 10 = 86

7 0
4 years ago
Find the solution of the system of equations<br> shown on the graph.
Ivan

Answer:

(-4, 3)

Step-by-step explanation:

From the graph, it looks like the two lines intersect at pint (-4, 3).

5 0
3 years ago
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