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timama [110]
2 years ago
13

With the equation 2/10=4/a-3 what does a equal?

Mathematics
1 answer:
shusha [124]2 years ago
5 0

Answer:

23

Step-by-step explanation:

Since 2/10 = 4/20, we know that a-3 = 20, so a = 20 + 3 = 23.

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A gardener wants to know if soaking seeds in water before planting them increases the proportion of seeds that germinate. To inv
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Answer:

d. I and III only

Step-by-step explanation:

I. The seeds should be randomly assigned to a treatment.

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Given :

Proportion 1 = P1 ;

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Sample assignment for both samples 1 and 2 into the different treatment groups should be randomized, that is a simple random sampling of subjects into the treatment and control group. The sample design for difference between two sample proportions should be independent.

Finally each of the two proportions P1 and P2 should record a minimum of 10 successes and 10 non - successful Occurrences.

3 0
2 years ago
(2x - 3y)(4x - y) can you help me
Mnenie [13.5K]

Answer:

<h2>(2x - 3y)(4x - y) = 8x² - 14xy + 3y²</h2>

Step-by-step explanation:

Use FOIL:  <em>(a + b)(c + d) = ac + ad + bc + bd</em>

(2x - 3y)(4x - y) = (2x)(4x) + (2x)(-y) + (-3y)(4x) + (-3y)(-y)

= 8x² - 2xy - 12xy + 3y²

<em>combine like terms</em>

= 8x² + (-2xy - 12xy) + 3y² = 8x² - 14xy + 3y²

3 0
3 years ago
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Complete the table for the given rule. Rule: y = x/2 - 1<br><br> X Y<br> 4 =<br> 6 =<br> 8 =
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\bf \begin{array}{|cc|ll} \cline{1-2} x&y\\ \cline{1-2} 4&\stackrel{\frac{4}{2}-1}{1}\\&\\ 6&\stackrel{\frac{6}{2}-1}{2}\\&\\ 8&\stackrel{\frac{8}{2}-1}{3}\\ &\\ \cline{1-2} \end{array}

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A desk has an are of 42 ft2 if the width is 3.5 feet writ an equation to represent the area
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Answer: 42=3.5x              :) .

4 0
3 years ago
What is the simplified expression for 4 power 4 multiplied by 4 power 3 over 4 power 5?
Rus_ich [418]
(4^4 * 4^3) / 4^5 = 

when multiplying exponents with the same base, add the exponents
(4^4 * 4^3 = 4^(4 + 3) = 4^7

now we have 4^7 / 4^5

when dividing exponents with the same base, u subtract the exponents.
4^7 / 4^5 = 4^(7-5) = 4^2 <===
4 0
3 years ago
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