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Sophie [7]
4 years ago
12

Solve2x^2 + 3x = 5 by factoring

Mathematics
2 answers:
diamong [38]4 years ago
8 0
Downloaded Photomath it’s going to help you a lot, and teaches you step by step, also it’s free try it
hodyreva [135]4 years ago
4 0

Answer:

x = -5/2

x = 1

Step-by-step explanation:

2x² + 3x = 5

2x² + 3x - 5 = 0

(2x + 5)(x - 1) = 0

2x + 5 = 0

2x = -5

x = -5/2

x - 1 = 0

x = 1

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4 years ago
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From 1997 - 2001 the number n (in millions) of black-and-white TV S sold in the U.S. Can be modeled by n = 26.8 * (0.85) ^ t whe
Alexandra [31]

Question

a) What is the decay factor?

b) What is the percent decrease?

c) Estimate the number of black and white TV's  sold in 1999.

Answer:

a. Decay factor = 0.85

b. Percent decrease = 15%

c. 19.363  million TVs were sold

Step-by-step explanation:

Given

n = 26.8(0.85)^t

Solving (a): The decay factor

An exponential function has the form

y = ab^x

Where b is:

b = decay\ factor\ or\ growth\ factor

By comparison:

b = 0.85

Solving (b): Percentage decrease:

Percentage decrease P is calculated as follows:

P = 1 - b

Substitute 0.85 for b

P = 1 - 0.85

P = 0.15

Convert to percentage

P = 0.15*100\%

P = 15\%

Solving (c): TVs sold in 1999

First, we need to determine the value of t for 1999

In 1997, t= 0

In 1998, t= 1

In 1999, t= 2

So, we substitute 2 for t in: n = 26.8(0.85)^t

n = 26.8(0.85)^2

n = 26.8*0.7225

n = 19.363

4 0
3 years ago
This table reflects the result of a survey conducted in a town to find out the number of cars of a particular color.
inysia [295]

the range that would be the most appropriate to represent the numerical data on the vertical axis is B. 20 to 100.

<h3>what range would be most appropriate?</h3>

the table is not included but the range of 20 to 100 is most appropriate for the number of cars in town with a particular color.

this is because towns would normally have between hundreds and thousands of cars which means that cars of a particular color would be between 20 and 100 at least.

find out more on bar graph ranges at brainly.com/question/25196929.

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6 0
2 years ago
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faltersainse [42]

Answer:

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Step-by-step explanation:

If 2y is NOT negative

2(4)-1=i

8-1=i

i=7

If 2y IS negative

-2(4)-1=i

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8 0
3 years ago
3 (4x - 2) - 30 = -6 (6 - 2x) - 20
irga5000 [103]

Answer:

B.

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4 years ago
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