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baherus [9]
3 years ago
11

Help, please! Struggling!

Mathematics
1 answer:
MArishka [77]3 years ago
6 0

Answer:

65

Step-by-step explanation:

(4-7i)(4+7i) =16 + 28i-28i -49i^2 ➡16 - 49i^2

16 + 49 = 65

the fault here is i^2= -1 and -1 multiplied by -49 is +49 not -49

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What is the equation in slope-intercept form that passes through the points (-4, 47) and (2, -16)?
Whitepunk [10]

Answer:

y = 10.5x - 37

General Formulas and Concepts:

<u>Pre-Algebra</u>

  • Order of Operations: BPEMDAS

<u>Algebra I</u>

Equality Properties

Slope Formula: m=\frac{y_2-y_1}{x_2-x_1}

Slope-Intercept Form: y = mx + b

  • m - slope
  • b - y-intercept

Step-by-step explanation:

<u>Step 1: Define</u>

Point (-4, 47)

Point (2, -16)

<u>Step 2: Find slope </u><em><u>m</u></em>

  1. Substitute:                    m=\frac{-16-47}{2+4}
  2. Subtract/Add:               m=\frac{63}{6}
  3. Simplify:                        m=\frac{21}{2}

<u>Step 3: Find y-intercept </u><em><u>b</u></em>

  1. Define:                    y = 21/2x + b
  2. Substitute:              -16 = 21/2(2) + b
  3. Multiply:                  -16 = 21 + b
  4. Isolate <em>b</em>:                 -37 = b
  5. Rewrite:                   b = -37

<u>Step 4: Write linear equation</u>

<em>Combine all parts.</em>

y = 21/2x - 37

y = 10.5x - 37

And we have our final answer!

5 0
3 years ago
At the clothing store, 1/8 of the clothes are shirts. Of the shirts 1/4 are green. What fraction of the clothing in the store ar
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Answer:

The fraction the clothing in the store are green shirts is 1/32

Step-by-step explanation:

∵ 1/8 of the clothes are shirts

∵ 1/4 of the shirts are green

∴ The fraction of green shirts are 1/8 × 1/4 = 1/32

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3 years ago
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valentina_108 [34]

Area  1 = 6 x 3 = 18

Area 2 = 12 x 6 = 72

Ratio = 18 : 72

Ratio = 1 : 4

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Answer:

I.4

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Which is the correct formula to calculate the volume of a cone?
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Answer:

Step-by-step explanation:

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