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3 years ago

9

Each of the 25 students in mr. McDonald's class at class sold 16 raffle tickets if each ticket cost $15 how much money did McDer

mott mr. McDonald's students raise

1 answer:

lozanna [386]3 years ago

6 0

I'm pretty sure its 6000 but I might be wrong.

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Somebody please help!!!

Mama L [17]

(3x^2+9x-6) - (2x^3-4x^2+6x-4)
Short Answer
2x^3+7x^2+3x-2

Step by Step
1.)2x^3 doesn’t subtract from anything because there are no other trinomials

2.)3x^2 - (-)4x^2 = 7x^2 because a double negative cancels out and you end up adding them

3.)9x-6x=3x

4.)-6 - (-)4 = -2 because double negatives cancel out into addition

8 0

2 years ago

Which expression is equivalent to 3(x - 5) + 2

pogonyaev

Answer:

3x-13 I believe

Step-by-step explanation:

You multiply the 3 to the x and the 5. This would equal 3x-15+2

You would then add the -15 and the 2. This would be the answer 3x-13

Sorry if it is wrong

8 0

3 years ago

Please please helpppp.

padilas [110]

There are 3 ways of solving a simultaneous problem, substitution method, elimination method and Gauss-Jordan method. I'm gonna use the substitution method since it's easier and i think it would suit your level more.

First let's try solving for y since it's easier to start with.

Firstly we have to find an equation for x:

$x-2y=2\\x-2y+2y=2+2y\\x=2+2y$

Great, now we can use the substitution method to find the value of y using the first equation:

$2x+3y=11\\2(2+2y)+3y=11\\4+4y+3y=11\\7y=7\\y=1$

Now we know that y=1 we can solve the first equation we made:

$x=2+2y\\x=2+2(1)\\x=4$

And the answer is $x=4 , y= 1\\(4,1)$

Double check:

$2x+3y=11\\2(4)+3(1)=11\\8+3=11\\11=11\\\\x-2y=2\\(4)-2(1)=2\\2=2$

And that's our final answer! (4,1)

7 0

3 years ago

In a hypothetical study, researchers found that the average donut sold by Krispy Kreme contains 260 calories, with a standard de

VladimirAG [237]

Answer:

Option C) 0.57

Step-by-step explanation:

We are given the following in the question:

Average, $\mu_0$ = 260 calories

Standard deviation, $\sigma$ = 35 calories

$\mu_1$ = 240 calories.

We have to find the Cohen's d effective size.

Formula:

$d = \bigg|\dfrac{\mu_1 - \mu_0}{\sigma}\bigg|\\\\d = \bigg|\dfrac{240-260}{35}\bigg|\\\\d = 0.57$

Thus, the Cohen's d effective size is 0.57

Thus, the answer is

Option C) 0.57

4 0

3 years ago

Mama L [17]

Answer:

x =−8

Step-by-step explanation:

7 0

2 years ago

Read 2 more answers