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3241004551 [841]
3 years ago
11

A store decreases the price of an item from 120 to 90. what is the percent decrease

Mathematics
1 answer:
vampirchik [111]3 years ago
8 0

There is a 25% decrease because the decrease is 30, which is 25% of 120.

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Answer:

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Step-by-step explanation:

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3 years ago
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Do you agree with the statement that " cubic functions must have at least 1 x-intercept but not more than 3, whereas quadratic f
vladimir2022 [97]

Answer:

Yes, I agree

Step-by-step explanation:

For the cubic function

A cubic function is represented as:

f(x)=ax^3+bx^2+cx+d

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For 3 x intercepts

y = x^3 - x

Equate y to 0

x^3 - x = 0

Expand

x(x^2 - 1) = 0

Express x^2 - 1 as difference of two squares

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

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For 2 x intercepts

y = x^3 - x

y  =(x-5)^2)(x+7)

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Expand

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For 1 x intercept

y = x^3

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x^3 = 0

Take cube roots of both sides

x = 0

It has been shown above that a cubic function may have 1, 2 or 3.

So, I agree to the statement

For the quadratic function

A quadratic function will not have any x intercept when the function can not be factorized;

E.g.

y = x^2 + x + 17

<em>The above function has no x intercept.</em>

A quadratic function will have at least 1 x intercept when the function can be factorized;

E.g.

y = x^2- 6x + 9

Equate y to 0

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Hence, I agree to both statement

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shepuryov [24]
2 and 7 r the answer

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Answer:

C

Step-by-step explanation:

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r/2 ≤ 3

Multiply both sides by 2

r/2 × 2 ≤ 3 × 2

r ≤ 6

This implies that possible value of r is equal to 6 or less than 6.

Graphing this on a number line, the line with a shaded circle, indicating that 6 is included, starts at 6 and points to the left.

This indicates that value of r ranges from 6 and below.

The graph is C.

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Theo wants to cover the top of a small table with square tiles. The table is 12 square tiles long and 8 square tiles wide. How m
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Answer:

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