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2 years ago

By what percent will the product of two numbers decrease if one of them is decreased by 20% and the other is decreased by 50%?

Mathematics

1 answer:

Furkat [3]2 years ago

8 0

Answer:

(x - .20)(x - .50)

$x^{2}$ = (.20)(.50)

$x^{2}$ = 0.1

x = $\sqrt{ .1$

x = .32

the product of two numbers decrease by 32%

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A family built a house in a beach resort area. In 1990, the house was 430 ft from the water. With erosion, the house was 400 ft

neonofarm [45]

We develop an equation for the given situation by first writing the general equation for lines,

y = mx + b

Substituting to this given the values given above,

(1990) 430 = b

(2000) 400 = m(10) + 430

The value of m from the equation in 2000 is -3. Thus, the equation of that relates the variables is,

y = -3x + 430

8 0

2 years ago

Fran reads 54 pages per hour Darnell reads 60 pages per hour if they both read for 2.5 hours how many more pages will Darnell Re

spin [16.1K]

Hey You! Here's How To Solve This Question:

STEP 1:

60 × 2.5 = 150

STEP 2:

54 × 2.5 = 135

STEP 3:

150 - 135 = 15

So, Darnell read 15 more pages than Fran.

I Really Hope My Answer Helped You!

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2 years ago

Given y = x + 1 Calculate y if x = 3. y is a natural number

kompoz [17]

Answer:

y = 4

Step-by-step explanation:

If 3 is x than you can substitute x for 3. y = 3 + 1. Then when you add y = 4

7 0

2 years ago

Read 2 more answers

A hypothetical square grows so that the length of its diagonals are increasing at a rate of 8m/min. How fast is the area of the

ad-work [718]

Answer: The area of the square is increasing at a rate of 90.4 m2/min (square meters/minute)

Step-by-step explanation: Please see the attachments below

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2 years ago

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1. Match the polynomial identity to the correct answer.

Katen [24]

Answer:

$a: (a-b)(a+b);b: (a-b)(a^{2}+ab+b^{2}); c: (a^{2} +2ab+b^{2}); d: (a+b)(a^{2}- ab+b^{2})$

Step-by-step explanation:

Given the expressions all that is required is to expand them (using the distributive property) to see which answers they match up to:

For a: $(a-b)(a+b)=a^{2} +ab-ab-b^{2} =a^{2}-b^2$

For b: $(a-b)(a^2+ab+b^2)=a^3+a^2b+ab^2-a^2b-ab^2-b^3=a^3-b^3$

For c calculate the square of a sum: $(a+b)^2=a^2+ab+ab+b^2$

(add like terms) c: $a^2+2ab+b^2$

For d: $(a+b)(a^2-ab+b^2)=a^3-a^2b+ab^2+a^2b-ab^2+b^3$ $=a^3+b^3$

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2 years ago