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3 years ago

Answer my math question I asked so many times I lost most of points by

Mathematics

1 answer:

Volgvan3 years ago

7 0

What kind of math is it ?

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Fine the x and y int of the line -10x-6y=120

vlabodo [156]

Y int = -20

X int = -12

5 0

3 years ago

Carly needs $149 to buy a skateboard. She already has $52. She earns money washing cars for $20 a car.

Blababa [14]

Answer:

$149 - skateboard price

$52 - carly's money

$20 × 5 cars = $100

$100 + $52 = $152

$152 - $149 = $3 left

5 0

3 years ago

In a carnival game, a person wagers $2 on the roll of two dice. if the total of the two dice is 2, 3, 4, 5, or 6 then the pe

Olin [163]

Answer: a loss of 4 cents

<u>Step-by-step explanation:</u>

The probability of rolling a sum of 2, 3, 4, 5, or 6 is $\dfrac{15}{36}$ which earns $2.00

The probability of rolling a sum of 28, 9, 10, 11, or 12 is $\dfrac{15}{36}$ which loses $2.00

The probability of rolling a sum of 7 is $\dfrac{6}{36}$ which loses $0.25

$\bigg(\dfrac{15}{36}\times \$2.00\bigg)+\bigg(\dfrac{15}{36}\times -\$2.00\bigg)+\bigg(\dfrac{6}{36}\times -\$0.25\bigg)=\boxed{-\$0.04}$

6 0

4 years ago

On what intervals is the graph of f(x)=x^3-2x^2+5x+1 increasing?

amid [387]

$f(x)=x^3-2x^2+5x+1\\ f'(x)=3x^2-4x+5\\
3x^2-4x+5=0\\\Delta=(-4)^2-4\cdot3\cdot5=16-60=-44$
$\Delta0 \Rightarrow$ the graph of the parabola is above the x-axis, so the derivative is always positive and therefore the initial function is increasing in its whole domain.

$f(x)=0.5x^2-6\\
f'(x)=x$
The function is decreasing when its first derivative is negative. The first derivative of this function is negative for $x$ so for $x\in(-\infty,0)$ the function is decreasing.

$f(x)=\dfrac{x+1}{x-1}\qquad(x\not=1)\\
f'(x)=\dfrac{x-1-(x+1)}{(x-1)^2}=-\dfrac{2}{(x-1)^2}$
The function is increasing when its first derivative is positive. The first derivative of this function is always negative therefore this function is never increasing.

3 0

4 years ago

Write an expression that represent the following. Add the sum by 5. Next, add 15 to that product,then triple the results.

Irina-Kira [14]

5+15=20
20x3=60

I'm probably wrong, but thats how I understood the question.

5 0

4 years ago