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LenaWriter [7]
3 years ago
14

A baseball is thrown in the air from center field to home plate. The path of the baseball is represented by the equation p(x)=−7

x2+52x+99. How long will it take for the ball to get to home plate?
Tell me what steps went wrong as I solved this problem. Explain how to fix it.

Problem:

P(x) = -7x2 +52x+99

Step 1: -7x2 +52x+99 = 0

Step 2: a = -7 b = 52 c = 99





Step 3: −52±(52)2−4(−7)(99)√2(−7)


Step 4: −52±5476√14


Step 5:−52±7414


Step 6: x = 117 x = - 9

Answer: 117 seconds
Mathematics
1 answer:
goblinko [34]3 years ago
4 0

Answer:

steps 3 went wrong

Step-by-step explanation:

the quadratic is

(-b +/- √ ( b^2 - 4ac) )/2a

-52 + √( 2704 +2772) /-14

-52 +74) / -14 = -22/14 = -11/7

-52 -74 / -14 = -126/-14 = 9

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Based on a poll 68% of internet users are more careful about personal information when using a public Wifi hotspot. What is the
Stella [2.4K]

Answer:

.98951424

Step-by-step explanation:

You find "1 - P(No ONE is careful)"

This is equivalent to "1 - (.32^4)," which simplifies to "1 - .01048576," which is .98951424

4 0
3 years ago
Please help me please help me please help me
MissTica

Answer:

B.50

Step-by-step explanation:

The two angles form a right angle ( indicated by the little square )

Right angles have a measure of 90 degrees

Hence, x + 10 + 30 = 90

( Note that we just created an equation that we can use to solve for x )

We now solve for x using the equation we created

x + 10 + 30 = 90

Combine like terms

x + 40 = 90

Subtract 40 from both sides

x = 50

3 0
3 years ago
Can someone help me with geometry ​
Vinil7 [7]

whats the question then?

7 0
3 years ago
Read 2 more answers
About how many pounds of coffee will you need to make 600 medium cups of coffee?
Veronika [31]

Answer:

A. 10

Step-by-step explanation:

I found a website that explains that you need 8.3 grams of coffee to make one 5-fl oz cup of coffee.

To make 600 cups, you need 600 * 8.3 g = 4980 g

Now we convert 4980 g to lb.

1 lb = 454 g

4980 g * (1 lb)/(454 g) = 11 lb

The closest answer is A. 10

Answer: A. 10

6 0
3 years ago
How do i solve divide 5/8 by 50%
Ede4ka [16]
50% is \frac{50}{100}
We have two ways to do this, pick your favor:
either by fractions:
\frac{5}{8} ÷ \frac{1}{2}
(\frac{50}{100} =  \frac{1}{2}
Multiply by the reciprocal of \frac{1}{2} which is 2(flip it)

\frac{5}{8} × 2 = \frac{5}{4} = 1.25

Or change them to decimals:
\frac{5}{8} = 0.625
\frac{50}{100} = 0.5

0.625 ÷ 0.5

0.5 I 0.625
multiply by 10 to make it easier to divide(it still gives us the same answer)
0.5 × 10 = 5
0.625 × 10 = 6.25
     1.25
5 I 6.25
    -5
     12
    -10
       25
      -25
         0

0.625 ÷ 0.5 = 1.25

7 0
3 years ago
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