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Korvikt [17]
2 years ago
11

The price of a laptop computer decreased from 475 to 275. What is the percent of decrease in price

Mathematics
1 answer:
anyanavicka [17]2 years ago
8 0
First find the difference in prices...

475 - 275 = 200 so the price went down 200 dollars. No we need to find what percentage of 475 is 200.

475 × x = 200
x = 200/475
x = .4211

Now convert to percentage by multiplying by 100 (move decimal 2 places to the right)

.4211 = 42.11%

It is a 42.11% price reduction.
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bearhunter [10]

Answer:

49/8 is the value of k

Step-by-step explanation:

We have the system

x = -2y^2 - 3y + 5

x=k

We want to find k such that the system intersects once.

If we substitute the second into the first giving us k=-2y^2-3y+5 we should see we have a quadratic equation in terms of variable y.

This equation has one solution when it's discriminant is 0.

Let's first rewrite the equation in standard form.

Subtracting k on both sides gives

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The discriminant can be found by evaluating

b^2-4ac.

Upon comparing 0=-2y^2-3y+5-k to 0=ax^2+bx+c, we see that

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3 years ago
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Step by step solution :Step  1  :            3 - a Simplify   —————             21  Equation at the end of step  1  :  (a - 3)   (3 - a)  ——————— ÷ ———————     7        21   Step  2  :            a - 3 Simplify   —————              7  Equation at the end of step  2  :  (a - 3)   (3 - a)  ——————— ÷ ———————     7        21   Step  3  :         a-3      3-a Divide  ———  by  ———          7       21 
 3.1    Dividing fractions 
To divide fractions, write the divison as multiplication by the reciprocal of the divisor :
a - 3     3 - a       a - 3        21  —————  ÷  —————   =   —————  •  ———————  7        21           7       (3 - a)
 3.2    Rewrite   (3-a)    as  (-1) •  (a-3) Canceling Out : 3.3    Cancel out  (a-3)  which now appears on both sides of the fraction line.
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Step-by-step explanation:

Given

Subtract the expression

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