MATHEMATICS HIGH SCHOOL

If two lines intersect and form 4 right angles, then ___________.a. the lines are parallel
b. the lines are perpendicular
c. the angles are complementary
d. the lines are not coplanar

Answers

Answer 1
Answer: the answer is b. Perpendicular.
The lines look like this:

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At Joe's Pizzeria, small pizzas cost $7.50, and large pizzas cost$11.00. One day between 3:00 PM and 9:00 PM, Joe sold 100 pizzasand took in $848. How many more small pizzas than large pizzas didJoe sell during that 6-hour period?(A) 28(B) 44(C) 56(D) 72
What value of m will make 4x-7y=5 and 9x+my=3 parallel?
An photo studio is going to display a portrait in their lobby. The portrait is being reproduced from a photo with dimensions 6 inches by 3 inches. If the dimensions of the portrait in the lobby are 20 times the dimensions of the original photo, determine the area of the portrait in square feet.a. 7,200 ft2b. 50 ftc. 300 ftd. 200 ft

Help with writing equations.
The pictures below have the questions I need help with.

Answers


I'm sure you know how to find the slope of a line if you know 2 points
on it ...  The slope is ...

       (difference in y-values) / (difference in x-values) .

Right ?

OK.  Each line in these tables is a point on the graph of the table.
Pick two points from the table, and you can get the slope of the line
from them.

The first table (Plan-A) has these points in it:

1 . . . . . $20.15
2 . . . . . $20.30
3 . . . . . $20.45
4 . . . . . $20.60

You want to find the equation of the line with these 4 points on it.
That means you need to find the slope and the intercept of the line.
Take any two points straight from the table.  I'll use the first two:

1 . . . . . $20.15
2 . . . . . $20.30

There you have two points on the line:  (1, 20.15) and (2, 20.30) .
The slope is  (difference in 'y') / (difference in 'x').

Difference in 'y' = (20.30 - 20.15) = 0.15
Difference in 'x' = (2 - 1) = 1

Slope of the line =  (0.15) / 1  =  0.15
(What that really means is 15 cents per minute on Plan-A.)

Now you know that the equation of the line is [ y = 0.15x + intercept ].

Can you think of a way to find the intercept ?
Remember ... every point in the table is on the line.
So why not just take one of these points in the table, put it into the part of the equation that you already have, and watch the intercept fall out ?
You could use any point at all from the table.
I'll use the 3rd one.

                                                         y = 0.15x + intercept

                                                  20.45 = 0.15(3) + intercept

                                                  20.45 = 0.45 + intercept

Subtract 0.45 from each side:    20.00 = intercept

The equation of the graph for Plan-A is    Charge = 0.15(minutes) + $20.00
===============================

Plan-B:

First two points:

Difference in y-values = (8.00 - 6.50) = 1.50
Difference in x-values = (10 - 5) = 5

Slope of the line = (1.50) / (5) = .30                (30 cents per minute)
Intercept = 5.00

Charge = 0.3(minutes) + $5.00
======================================

Plan-C:

Slope = 4.50 / 10  =  0.45
Intercept = zero
=================================

Plan-D:

Slope = (16.50 - 11.00) / (30 - 20) = 5.5/10 = 0.55
Intercept = zero

In each plan, the intercept is the cost just to sign up, before you use
the phone, and then the slope is the cost for each minute of talking on it.

Screen measures 30 cm wide n 22 cm high what is the diagonal measure of the screen

Answers

I think you'd use the pythagoran theorem for this (a squared + b squared = c squared). So 30 squared plus 22 squared equals the diagonal measure squared. This is 900 + 484 = c squared. That's 1384. The square root of that is 37.

Write an equation
Eight times the sum of m and 7 is 21

Answers

Answer:

the equation would be 8(m+7)=21
8 ( m + 7 ) = 2 1
your welcome ! <3

Use synthetic division to find the quotient and remainder (x^3-5x^2+3x-1) divide by (x+1)

Answers

Answer:

The answer to your question is:

              1x² - 6x + 8 - 9 / (x³ - 5x² + 2x -1)

Step-by-step explanation:

Divide  x³ - 5x² + 2x -1 by x + 1

               1        -5        +2       -1            -1

                        -1          +6      -8                                              

               1        -6        +8       -9

               1x²    - 6x     + 8      - 9 / (x³ - 5x² + 2x -1)

             

If i have 2 lemons and i give 1 away. how many do i have now?

Answers

1 lemon?

.....................................

Explain why 1.19 is the greatest amount of money it is possible to have without being able to make change for a dollar

Answers

Hello,

There are only 2 solutions for $1.19

In cents:
119=1*25+9*10+0*5+4*1
119=3*25+4*10+0*5+4*1

Thus
120=119+1=(1*25+9*10+0*5+4*1) +1 =1*25+9*10+0*5+5*1
but 1*25+7*10+0*5+5*1=100

120=119+1=(3*25+4*10+0*5+4*1)+1=3*25+4*10+0*5+5*1
but 3*25+2*10+0*5+5*1=100

So there are no solution for $1.20
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