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tekilochka [14]
3 years ago
9

Brian’s grandmother offered to give him a gift of 50% of the amount of money he saved in one year. His grandmother gave him $60.

How much did he save?
Mathematics
1 answer:
Mice21 [21]3 years ago
7 0

Answer:

$120

Step-by-step explanation:

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Solve x and y 3x-4y=18,9x-2y=12
Rudiy27

Answer:

3x-4y=18

1xy=18

xy=18 ans

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In a pack of skittles, 27% are red what percentage are not red?
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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

A cubic function may have 1, 2 or 3 x intercepts. This is shown below

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

<em>x = 0 or 1 or -1</em>

For 2 x intercepts

y = x^3 - x

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

Equate y to 0

(x-5)^2(x+7) = 0

Expand

(x-5)(x-5)(x+7) = 0

<em>x= 5 or x = -7</em>

For 1 x intercept

y = x^3

Equate y to 0

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

x^2- 6x + 9 = 0

Expand

x^2 - 3x - 3x + 9 = 0

(x - 3)(x-3) = 0

x = 3

We've shown that a quadratic may have no x intercept, and it may also have x intercept(s)

Hence, I agree to both statement

3 0
3 years ago
Question 3
nalin [4]

Answer:

idk

Step-by-step explanation:

i+d+k= idk

6 0
3 years ago
find the size of each sample needed to estimate the difference between the proportions of boys and girls under 10 years old who
Alex Ar [27]

Answer:

sample

Step-by-step explanation:

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