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2 years ago

PLEASE HELP

1 answer:

3 0

Answer: A Yes, because the balls are randomly selected, the distances of the new ball can be compared to the distances of the original ball.

B Yes, because the original ball type is included in this experiment, the distances the different balls travel can be accurately compared.

Step-by-step explanation:

C No, because a placebo ball was not used, a comparison cannot be made to determine if the new ball travels significantly farther.

D No, because all of the new type of balls are not hit first, the distances they travel cannot be compared to the distances of the original ball.

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A toy store retailer charges $26.88 for a board game. He marks up his goods by 25% before selling them. What was the cost of the

Semenov [28]

Answer:

21.50

Step-by-step explanation:

Let C = cost before markup

1.25 C = 26.88

C = 26.88/1.25 = 21.50

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2 years ago

you are a school photographer taking individual and class pictures for 2 classes of 21 students each on average each individual

uysha [10]

Answer: Approximately 146 minutes (or if you need the simplified version the answer is 2 hours and 26 minutes). Step-by-step explanation: Step 1. Two classes of 21 students. To calculate that you would multiply 21 by 2. 21*2=42 Step 2. So now we know you need 42 individual pictures. If they each take 3 minutes to take you need to multiply 42 by 3. 42*3=126. So now you know it’ll take 126 minutes to take all the individual pictures. Step 3. Now, there are 2 classes of people and it takes 10 minutes to take each class picture. So do calculate that you need to multiply 10 by 2. 10*2=20. So it’ll take 20 minutes to take both class pictures. Step 4. Now we know it’ll take 126 minutes to take all the individual photos and 20 minutes to take the class photos. Now to calculate the total amount of time it’ll take to take all the photos you need to add 20 to 126. 126+20=146. So, it’ll take 146 minutes to take all the photos. Step 5. (You can skip this step if no simplification is needed in your problem) So, we all know there is 60 minutes in an hour so we’ll divide 146 by 60. 146/60=2.43. So, now we know it’ll take 2.43 hours to take all the photos. 2.43 hours is 2 hours and 26 minutes. I hope this helps!

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3 years ago

If f(x) = 3x+5 and g(x) = -2x^2-5x+3 fins (f+g)(x)

Pani-rosa [81]

Answer:

f(x) + g(x) = -2x^2 - 2x + 8

Step-by-step explanation:

Given: f(x) = 3x+5 and g(x) = -2x^2-5x+3

Find f(x) + g(x)

f(x) + g(x) = 3x + 5 + (-2x^2 - 5x + 3)

f(x) + g(x) = 5 + -2x^2 - 2x + 3

f(x) + g(x) = -2x^2 - 2x + 8

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3 years ago

Read 2 more answers

You fit a trendline of y = 2x 1 to your data. what would the residual be for a data point measured as y = 3.5 for an x value of

nata0808 [166]

For a data point measured as y = 3.5 for an x value of x = 1.2, the residual would be 0.1

For given question,

we have been given an equation 2x + 1 that represents an equation for a trendline to the data.

General formula with residual is y = 2x + 1 + r, where r is a residual.

We need to find the residual for a data point measured as y = 3.5 for an x value of x = 1.2

We substitute given values of x and y in the residual equation

y = 2x + 1 + r

For y = 3.5 and x = 1.2,

⇒ 3.5 = 2(1.2) + 1 + r

⇒ 3.5 = 2.4 + 1 + r

⇒ r = 3.5 - 3.4

⇒ r = 0.1

Therefore, for a data point measured as y = 3.5 for an x value of x = 1.2, the residual would be 0.1

Learn more about the residual here:

brainly.com/question/10228420

#SPJ4

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2 years ago

Quadratic Functions in Standard Form

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Answer:

You just need to put the given value of x-input in function f(x)=2x²+6x-8 to get y-output

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3 years ago