MATHEMATICS HIGH SCHOOL

The golfer hits the golf ball. The quadratic y=-8*x^2 +48*x gives the time x seconds when the golf ball is at height 0 feet. In total, how long is the golf ball in the air?

Answers

Answer 1
Answer: y=-8\cdot x^2 +48\cdot x =-8x(x-6)\n \n-8x(x-6)=0\ \ \ \Leftrightarrow\ \ \ -8x=0\ \ \ \vee\ \ \ x-6=0\n \n.\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ x=0\ \ \ \ \ \ \ \ \ \ \ \ \ \ x=6\n \n Ans.\ the\ golf\ ball\ is\ in\ the\ air\ 6\ seconds.

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Subtract. Write your answer in simplest form. 2/3 -3/8

In a random sample of 75 individuals, 52 people said they prefer coffee to tea. 99.7% of the population mean is between 84/80/74 % and 64/58/54%. (Choose the option closest to your answer.)

Answers

Using a 1-sample z-interval for the population proportion with confidence level 0.997, the sample probability is 0.69 with margin of error of 0.16, so between 0.69+0.16=0.85 of the population and 0.69-0.16=0.53 of the population prefers coffee.  84% and 54% are the correct answers.

The correct answers are

84 and 54

:)

Which products result in a perfect square trinomial? Check all that apply.A=(–x + 9)(–x – 9)
B=(xy + x)(xy + x)
C=(2x – 3)(–3 + 2x)
D=(16 – x2)(x2 – 16)
E=(4y2 + 25)(25 + 4y2)

Answers

The correct answers are:

B=(xy + x)(xy + x) ; C=(2x – 3)(–3 + 2x) ; and E=(4y² + 25)(25 + 4y²)

Explanation:

In order to have a perfect square trinomial, we must multiply two binomials that are exactly the same.  For (xy+x)(xy+x), are multiplying two identical binomials.

For (2x-3)(-3+2x), we are multiplying two binomials that are the same but written in a different order.  The same is true of (4y² + 25)(25 + 4y²).

Answer:

A and E and C

Step-by-step explanation:

A perfect square trinomial can be written as the square of a binomial.

Which statement is true about a line and a point

Answers

A point is a location and a line has points on it.
well a point is a location and a line has many points located on it, I hope that answered your question or is close to one of the choices

Solve for p:2(p+1)=5(3p+7)

Please help!! I got to the last part of the equation and now I'm lost.

Answers

Isolate the variable by dividing each side by factors that don't contain the variable.

Exact Form:

p = −33/13

Decimal Form:

p = −2.¯538461 (terminating)

Mixed Number Form:

p = −2/7/13

Solve the equations
9x+2=3x-10

3(x-2)=-2(x+3)

Answers

 9x + 2 = 3x - 10
-3x        -3x        
 6x + 2 = -10
        -2     -2
       6x = -12
        6       6
         x = -2

3(x - 2) = -2(x + 3)
3(x) - 3(2) = -2(x) - 2(3)
3x - 6 = -2x - 6
+2x      +2x       
5x - 6 = -6
     +6    +6
      5x = 0
       5     5
       x = 0

Your bank balance is $102.35 and you've just made purchases for $20, $33.33, and $52.80. You then make deposits of $25 and $24.75. What's your new balance?

Answers

Answer:

The new balance is $45.97 .

Step-by-step explanation:

As given

Your bank balance is $102.35 and you've just made purchases for $20, $33.33, and $52.80.

Bank balance after the purchase = $102.35 - $20 -$33.33 - $52.80

                                                       = $102.35 - $ 106.13

                                                       = - $3.78

As given

You then make deposits of $25 and $24.75.

Total deposit money = $25 + $24.75

                                  = $49.75

Thus

New balance = Bank balance after the purchase + Total deposit money

                      = - $3.78 + $49.75

                      = $ 45.97

Therefore the new balance is $45.97 .
$102.35 - $20 = $82.35
$82.35 - $33.33 = $49.02
$49.02 - $52.80 = $-3.78
$-3.78 + $25 = $21.22
$21.22 + $24.74 = $45.97
so $45.97 is your answer
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