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Phantasy [73]
3 years ago
5

Cheryl wants to find the number of hours seventh-graders do homework each week. There are 297 girls and boys in seventh grade. W

hich is the best way for Cheryl to get a representative sample without spending too much time?
Mathematics
1 answer:
Nadusha1986 [10]3 years ago
6 0

Answer:

The best way is for Cheryl to take a survey of a group of seventh graders and average that answer

Step-by-step explanation:

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2x4=8 3x4=12 cups fruit juice
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What is the solution set for this inequality?
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Answer:

x < 56

Step-by-step explanation:

- x + 40 > -16

-x + 40 - 40 > -16 -40

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-x / -1 > -56 / -1

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4 0
2 years ago
How do i solve this equation<br> -4p+9=-5
gregori [183]

Answer:

p = 7/2

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

Equality Properties

  • Multiplication Property of Equality
  • Division Property of Equality
  • Addition Property of Equality
  • Subtract Property of Equality

Step-by-step explanation:

<u>Step 1: Define</u>

-4p + 9 = -5

<u>Step 2: Solve for </u><em><u>p</u></em>

  1. Subtract 9 on both sides:                     -4p = -14
  2. Divide -4 on both sides:                       p = 7/2

<u>Step 3: Check</u>

<em>Plug in p into the original equation to verify it's a solution.</em>

  1. Substitute in <em>p</em>:                    -4(7/2) + 9 = -5
  2. Multiply:                               -14 + 9 = -5
  3. Add:                                     -5 = -5

Here we see that -5 does indeed equal -5.

∴ p = 7/2 is the solution to the equation.

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3 years ago
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ra1l [238]
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2 years ago
What is the equation of the line that passes through the point (3,2) and has a slope of 2/3 ​
Sladkaya [172]

Answer:

y= ⅔x +1

Step-by-step explanation:

(3,2) = (x_1,y_1) \\  m =  \frac{2}{3}

Substitute values into point slope form

y -y_1 = m(x - x_1) \\ y - 2 =  \frac{2}{3} (x - 3) \\ y - 2 =  \frac{2}{3} x - 1 \\

y =  \frac{2}{3} x - 1 + 2 \\ y =  \frac{2}{3} x + 1

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3 years ago
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