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3 years ago

5

PLEASE HELP ME I HATE MATH.

1 answer:

dsp733 years ago

7 0

Answer:

BBBBBBBBBB

Step-by-step explanation:

1/4 mile per 22.5 seconds

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A store is advertising a 25% off sale. Mikale purchases a swimming pool for $225. What was the original price of the pool?

DIA [1.3K]

Answer:

B

Step-by-step explanation:

7 0

3 years ago

If f(x)=x squared-2x and g(x) = 6x+4 for which is a value of x does (f+g)(x) =0

ra1l [238]

Answer:

For $x = -2$

Step-by-step explanation:

Solving a quadratic equation:

Given a second order polynomial expressed by the following equation:

$ax^{2} + bx + c, a\neq0$ .

This polynomial has roots $x_{1}, x_{2}$ such that $ax^{2} + bx + c = a(x - x_{1})*(x - x_{2})$ , given by the following formulas:

$x_{1} = \frac{-b + \sqrt{\Delta}}{2*a}$

$x_{2} = \frac{-b - \sqrt{\Delta}}{2*a}$

$\Delta = b^{2} - 4ac$

In this question:

$f(x) = x^2 - 2x$

$g(x) = 6x + 4$

$f(x) + g(x) = (f+g)(x) = x^2 - 2x + 6x + 4 = x^2 + 4x + 4$

Which is a value of x does (f+g)(x) =0

$x^2 + 4x + 4$

Quadratic equation with $a = 1, b = 4, c = 4$

So

$\Delta = 4^{2} - 4*1*4 = 0$

$x_{1} = \frac{-4 + \sqrt{0}}{2} = -2$

$x_{2} = \frac{-4 - \sqrt{0}}{2} = -2$

For $x = -2$

7 0

3 years ago

Your answer should be a polynomial in standard form.<br> (6f-7)(8f-9)=

ASHA 777 [7]

Answer:

(6f+−7)(8f+−9)

=(6f)(8f)+(6f)(−9)+(−7)(8f)+(−7)(−9)

=48f2−54f−56f+63

=48f2−110f+63

Step-by-step explanation:

7 0

3 years ago

Consider the following function.f(x) = 16 − x2/3Find f(−64) and f(64).

malfutka [58]

Answer: $f(-64)=0$

$f64)=0$

Step-by-step explanation:

The given function : $f(x)=16-x^{2/3}$

When we substitute x= -64, we get

$f(x)=16-(-64)^{2/3}$

Since , $64=4\times4\times4=4^3$

So, $-64=-4\times-4\times-4=-4^3$

That means $f(-64)=16-(-64)^{2/3}=16-(-4^3)^{2/3}$

$=16-(-4)^2=16-(-4\times-4)=16-16=0$

i.e. $f(-64)=0$

Similarly, When we substitute x= 64, we get

$f(x)=16-(64)^{2/3}$

Since , $64=4\times4\times4=4^3$

That means $f(64)=16-(64)^{2/3}=16-(4^3)^{2/3}$

$=16-(4)^2=16-16=0$

i.e. $f64)=0$

3 0

4 years ago

Jay's mean score for four quizzes is 99. His scores for the first three quizzes are 88 , 55 , and 99. What is Jay's score

Katarina [22]

Answer: 154

Step-by-step explanation:

The mean is calculated by adding up all the numbers and dividing by the number of observations added up.

The above can therefore be expressed as:

(88 + 55 + 99 + x) / 4 = 99

242 + x = 99 * 4

242 + x = 396

x = 396 - 242

x = 154

6 0

3 years ago