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3 years ago

Find the difference (3-2x+2x^2)-(4x-5+3x^2)

Mathematics

1 answer:

attashe74 [19]3 years ago

3 0

5x^2+2x-2 if that is a help tell me what I have to find

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Determine whether the quantitative variable is discrete or continuous. Number of lightning strikes in a city in one yearnumber o

charle [14.2K]

solution:

The variable is discrete because it is countable.

The number5 of lightning strikes in a city in one year is countable value.

So, it is discrete

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3 years ago

Allen is buying a video that originally cost $49.He has a 10%-off coupon and will have to pay a 6% sales which expression will c

Gekata [30.6K]

Answer:

$46.746

Step-by-step explanation:

Allen is buying a video that originally cost = $ 49

Discount coupon = 10%

Sales tax= 6%

Hence, the price of video after discount coupon and sales tax= $ 49 × $\frac{100-10}{100}$ × $\frac{100+6}{100}$

Hence, the price of video after discount coupon and sales tax= $ 49 × $\frac{90}{100}$ × $\frac{106}{100}$

Price of video after discount coupon and sales tax= $ 49 × 0.9× 1.06

price of video after discount coupon and sales tax= $46.746

Hence, the correct answer is $46.746

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3 years ago

The heights of two similar parallelograms are 16 inches and 20 inches. Their

Fittoniya [83]

Answer: $x=\dfrac{25}{21}$

Step-by-step explanation:

Area of parallelogram = Base x height

If two parallelograms are similar, then their corresponding sides are proportional.

That means, $\dfrac{\text{Area of first parallleogram}}{\text{Area of second parallleogram}}=\dfrac{\text{height of first parallelogram}}{\text{height of second parallelogram}}$

$\Rightarrow \dfrac{3x+5}{9x}=\dfrac{16}{20}\Rightarrow \dfrac{3x+5}{9x}=\dfrac{4}{5}\\\\\Rightarrow 5(3x+5)=4(9x)\\\\\Rightarrow\ 15x+25 = 36x\\\\\Rightarrow\ 36x-15x=25\\\\\Rightarrow\ 21x = 25\\\\\Rightarrow\ x=\dfrac{25}{21}$

Hence, $x=\dfrac{25}{21}$

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2 years ago

What are the equations of lines m and q? Please

Karo-lina-s [1.5K]

Answer:

Step-by-step explanation:

3 0

3 years ago

3X + 2 = 17 how do I show my work for this?

SCORPION-xisa [38]

Answer:

x = 5

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

Multiplication Property of Equality
Division Property of Equality
Addition Property of Equality
Subtraction Property of Equality

Step-by-step explanation:

Step 1: Define

Identify

3x + 2 = 17

Step 2: Solve for x

[Subtraction Property of Equality] Subtract 2 on both sides: 3x = 15
[Division Property of Equality] Divide 3 on both sides: x = 5

8 0

2 years ago

Read 2 more answers