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3 years ago

PLZZZZZ NEED HHELP!!!!!!

Mathematics

2 answers:

Andru [333]3 years ago

6 0

I think it's (x2-2x-2)(x)

weqwewe [10]3 years ago

5 0

X3 - 2x2 + 12x - 6 - 4x2 - 6x + 4
x3 - 6x2 + 6x - 2

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Please help!!!!!!!! this is worth 60 points!!!!!!

Alik [6]

Answer:

$y=1.25x+3.5$

Step-by-step explanation:

Let $y$ represent number of tickets and $x$ represent the total cost to purchase them.

Now,assuming the relation to be of the form:

$y=ax+b$ , where, $a$ and $b$ are constants.

Let us find $a$ and $b$ using the values from the table.

For, $x=7,y=12.25$ . So,

$12.25=7a+b\\or\ 7a+b=12.25------------1$

For, $x=10,y=16$ . So,

$16=10a+b\\or\ 10a+b=16------------2$

Subtract equation 1 from equation 2. This gives,

$10a+b-7a-b=16-12.25\\(10a-7a)+(b-b)=3.75\\3a=3.75\\a=\frac{3.75}{3}=1.25$

Now, plug in $a=1.25$ in equation 1 and solve for $b$

$7(1.25)+b=12.25\\8.75+b=12.25\\b=12.25-8.75=3.5$

Therefore, the relation between the number of tickets and total cost of purchase is given as:

$y=ax+b\\y=1.25x+3.5$

6 0

3 years ago

Which article headline indicates a correlation between two variables?

kotegsom [21]

Do you have a b c or d

4 0

3 years ago

Write the equation of a line with a slope of -1 and a y-intercept of -6

horrorfan [7]

The formula for an equation is y=mx+b. M is the slope and B is the y-intercept. Since the slope is -1 and the y-intercept is -6 the equation would be y=-1x-6

4 0

4 years ago

If a certain cannon is fired from a height of 8.8 meters above the ground, at a certain angle, the height of the cannonball ab

Dennis_Churaev [7]

Answer:

It would take approximately 6.50 second for the cannonball to strike the ground.

Step-by-step explanation:

Consider the provided function.

$h(t)=-4.9t^2+30.5t+8.8$

We need to find the time takes for the cannonball to strike the ground.

Substitute h(t) = 0 in above function.

$-4.9t^2+30.5t+8.8=0$

Multiply both sides by 10.

$-49t^2+305t+88=0$

For a quadratic equation of the form $ax^2+bx+c=0$ the solutions are: $x_{1,\:2}=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$

Substitute a = -49, b = 305 and c=88

$t=\frac{-305+\sqrt{305^2-4\left(-49\right)88}}{2\left(-49\right)}=-\frac{-305+\sqrt{110273}}{98}\\t = \frac{-305-\sqrt{305^2-4\left(-49\right)88}}{2\left(-49\right)}= \frac{305+\sqrt{110273}}{98}$

Ignore the negative value of t as time can't be a negative number.

Thus,

$t=\frac{305+\sqrt{110273}}{98}\approx6.50$

Hence, it would take approximately 6.50 second for the cannonball to strike the ground.

6 0

3 years ago

Two planes leave an airport at noon. If the eastbound plane flies at 560 mph and the westbound plane flies at 500 mph, at what t

o-na [289]

Your problem is an example of a distance problem, so you muct know the formula to find the distance. To find the distance we simply multiply the rate by the time, or as you'll see more often, d = r t. That means to calculate distance traveled you need rate and time.

Take note, planes are traveling in opposite direction, which means 2000 miles will be the sum of the distances that the two planes have traveled.

D (Plane 1) + D(Plane 2). = 2000

Let t = time in minutes

560t + 500t = 2000

Solve for t. Take it ftom here.

5 0

3 years ago