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andrew11 [14]
2 years ago
10

2.5 L for 16 hours = __________ mL/hr Round to tenths

Mathematics
1 answer:
Llana [10]2 years ago
4 0
To be honest I think it’s 48 round the three
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3 years ago
The scatter plot shows the average heights of children up to age 5.
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Answer:

(a) y = 4.5x  + 22 -- The equation

(b) 31 inches

Step-by-step explanation:

Given

See attachment

Solving (a): The equation of the trend line.

We start  by calculating the slope (m)

m = \frac{y_2 - y_1}{x_2 - x_1}

Where

(x_1,y_1) = (0,22)

(x_2,y_2) = (4,40)

So, we have:

m = \frac{40 - 22}{4 - 0}

m = \frac{18}{4}

m = 4.5

The equation is then calculated using:

y = m(x-x_1)+y_1

Where:

(x_1,y_1) = (0,22)

m = 4.5

y = 4.5(x - 0) + 22

Open bracket

y = 4.5x - 0 + 22

y = 4.5x  + 22

(b) The height of a 2 year old.

To do this, we substitute 2 for x in y = 4.5x  + 22

y = 4.5 * 2 + 22

y = 9+ 22

y = 31

The prediction is 31 inches

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3 years ago
72 = 9x what's the value of x<br> Please help, thank you
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Solve the System of Equations -4x + 9y = 14 12x - 10y = - 8
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Answer:

(1, 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

<u>Algebra I</u>

  • Solving systems of equations using substitution/elimination

Step-by-step explanation:

<u>Step 1: Define Systems</u>

-4x + 9y = 14

12x - 10y = -8

<u>Step 2: Rewrite Systems</u>

-4x + 9y = 14

  1. Multiply everything by 3:                    -12x + 27y = 42

<u>Step 3: Redefine Systems</u>

-12x + 27y = 42

12x - 10y = -8

<u>Step 4: Solve for </u><em><u>y</u></em>

<em>Elimination</em>

  1. Combine 2 equations:                    17y = 34
  2. Divide 26 on both sides:                y = 2

<u>Step 5: Solve for </u><em><u>x</u></em>

  1. Define equation:                    12x - 10y = -8
  2. Substitute in <em>y</em>:                       12x - 10(2) = -8
  3. Multiply:                                  12x - 20 = -8
  4. Isolate <em>x</em> term:                        12x = 12
  5. Isolate <em>x</em>:                                 x = 1
6 0
3 years ago
Read 2 more answers
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