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DerKrebs [107]
3 years ago
12

Select the correct answer.

Mathematics
1 answer:
Andre45 [30]3 years ago
6 0

Answer:

x = 12

Is the answer

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How to factor 25x^2 - 81= 0
dalvyx [7]
Your question is a difference of squares. both terms that need to be factored are squared. to solve take the square root of each put into two terms one of addition and one of subtraction.

anwser= (5x-9)(5x+9)

the reason this works is because when you foil you get
25x²-45x+45x-81 
the middle terms cancel revealing
25x²-81
4 0
3 years ago
1. How many parts have the same color? 2. Identify the colors that occupies the first three largest part.
Jlenok [28]

9514 1404 393

Answer:

  1. no parts have the same color (0)
  2. yellow, blue, red
  3. percentages can be written in several forms: fraction, decimal, for example. The sectors can also be identified by their angle measures.
  4. see attached

Step-by-step explanation:

1. The seven different sectors have seven different colors. No parts have the same color.

2. The attached table lists the sectors in decreasing order of size. The largest three are yellow, blue, red.

3. Percentages can be written a number of ways. They can be written as decimal numbers, or as fractions. In a pie chart, the sectors can also be given an angle measure.

4. Fraction equivalents of the percentages are shown in the attached.

5. Reduce fraction equivalents of the percentages are shown in the attached.

4 0
3 years ago
Evaluate f(x)= 1.8 X 2^x for x=6 <br><br> A: 115.2<br><br> B: 2176.78<br><br> C: 21.6
attashe74 [19]
By substitution
f(6) = 1.8×2^(6)
= 1.8×64
= 115.2
3 0
3 years ago
Read 2 more answers
BRIANLIST ANSWER!! Please help on this one question ( if you’re good at this) thanks :))
ivann1987 [24]

Answer:

Step-by-step explanation:

(21²+10²)½ = 23.25= 23.3

5 0
3 years ago
On the exam, Rebecca successfully created 20 out of 25 vases.
juin [17]

\text{Hello there! :]}

\large\boxed{125 \text { vases}}

\text{To solve, find the proportion of successes from the total:}\\\\20 / 25 = 4 / 5\\\\\text{Set up a proportion to find the # of vases necessary to complete 100 successfully:}\\\\\frac{20}{25}  = \frac{100}{x} \\\\\text{Cross multiply to solve:}\\\\20 * x = 100 * 25\\\\20x = 2500\\\\\text{Divide both sides by 20:}\\\\x = 125 \text{ vases}

7 0
3 years ago
Read 2 more answers
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