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Maru [420]
3 years ago
7

Lillian wants to buy a digital camera for $143.00. She baby-sits for $2.75 an hour. So far she has worked a total of 30 hours. H

ow many more hours does she need to work to have enough to buy the camera?
Mathematics
1 answer:
pshichka [43]3 years ago
4 0
Twenty-two hours I believe..
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Consider the line 7x+9y=5
alisha [4.7K]

Answer:

The slope of a line parallel to this line will be: -7/9

The slope of the perpendicular line will be:

\frac{-1}{\frac{-7}{9}}=\frac{9}{7}

Step-by-step explanation:

We know the slope-intercept form

y=mx+b

Here,

  • m is the slope
  • b is the y-intercept

Given the equation

7x+9y=5

simplifying to write in the lope-intercept form

y=-\frac{7}{9}x+\frac{5}{9}

Thus, the slope of the line is: -7/9

The slope of a line parallel to the line:

We have already determined that the slope of the line is: -7/9

  • We know that the parallel lines have the same slope.

Thus, the slope of a line parallel to this line will be: -7/9

The slope of a line perpendicular to the line:

We have already determined that the slope of the line is: -7/9

As we know that the slope of the perpendicular line is basically the negative reciprocal of the slope of the line.

Thus,  the slope of the perpendicular line will be:

\frac{-1}{\frac{-7}{9}}=\frac{9}{7}

4 0
3 years ago
Erry has taken a random sample of students and determined the number of electives that each student in his sample took last year
Cerrena [4.2K]
The mean should be about the same, because the sample is random
6 0
3 years ago
Read 2 more answers
Which graph represents the solution for the equation 1/6x=-2x+5
Varvara68 [4.7K]
More information please.
8 0
3 years ago
100 POINTSbrainlest to the person who get it right
Zina [86]

Answer:

[1] x² - 4/2x - 4

  • 3² - 4/2 × 3 - 4 = 9 - 4/2
  • 5/2

[2] 4 - 3x/2x + 4

  • 4 - 3 × 2/2 × 2 + 4 = 2/8
  • 1/4

[3] x²/2x² - 2

  • 0²/2 × 0² - 2
  • 0

[4] x² + 5/5 - x

  • - 2² + 5/5 + 2 = 4 + 5/7
  • 9/7

[5] - x³/x² - 4

  • - 1³/-1² - 4 = - 1/1 - 4
  • 1/3

[6] x + 3/x³ - 1

  • - 3 + 3/- 3³ - 1 = 0/- 27 - 1
  • 0

[7] 5 - x²/3x²

  • 5 - (- 4)²/3 × - 4² = 5 - 16/3 × 16
  • - 11/48

[8] - 2x + 6/2x³ - 3

  • - 2 × - 2 + 6/2 × - 2³ - 3
  • 10/- 19

[9] 4x²/- 3x² + 1

  • 4 × 1²/- 3 × 1² + 1 = 4/- 2
  • - 2

[10] 4x - 1/6x + 1

  • 4 × 3 - 1/6 × 3 + 1
  • 11/19

[11] x² - 1/x² + 1

  • 1² - 1/1² + 1 = 0/2
  • 0
8 0
3 years ago
Read 2 more answers
A model spaceship costs $15.99 before tax. The tax on the model spaceship is 8%.
Vlad1618 [11]
15.99×8/100=1.28$ this is the tax
to get the total cost 15.99+1.28= 17.27$
7 0
3 years ago
Read 2 more answers
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