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fiasKO [112]
1 year ago
11

HELPPPPPP HELPPPPP PLEASE!!!!!!

Mathematics
1 answer:
blondinia [14]1 year ago
6 0

Answer:

D

Step-by-step explanation:

x squared add up to 9x^2 and 5-5=0 so it has to be D

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A ball is thrown in the air from a ledge. Its height in feet is represented by f(x) = –16(x2 – 5x – 6), where x is the number of
Oduvanchick [21]

The ball takes 6 seconds to reach the ground.

<u><em>Explanation</em></u>

Height of the ball after x seconds is represented by....

f(x)= -16(x^2 -5x-6)

The height of the ball is 0 feet when it hits the ground. So, for finding the number of second the ball takes to reach the ground, <u>we will just plug f(x)=0 into the above equation and then solve for x.</u>

Thus...

0=-16(x^2-5x-6)\\ \\ x^2-5x-6=0\\ \\ (x-6)(x+1)=0

Using zero-product property....

x-6=0\\ x=6

and

x+1=0\\ x=-1 (Negative value is ignored as time can't be negative)

So, the ball takes 6 seconds to reach the ground.

4 0
3 years ago
Read 2 more answers
59.2g of sugar is needed to make 8 cakes. How much sugar is needed for 11 cakes?
Eva8 [605]

Answer:

81.4

Step-by-step explanation:

59.2g is for 8, so to find the price per, 59.2/8=7.4. 7.4*11=81.4

3 0
2 years ago
Read 2 more answers
A principle of $2000 is placed ina saving account at 3% APR compounded annually. How much is in the account after one year, two
Kisachek [45]

Answer:

1 year:  $2060

2 years: $2121.80

3 years: $2185.45

Step-by-step explanation:

Compound interest formula is A = P(1 + \frac{r}{n}^{nt) where A is the final amount, P is the initial principal balance, r is the interest rate, n is the number of times interest applied per time period, and t is the number of time periods elapsed. In our case, P would be equal to 2000 dollars, r would be equal to 0.03, for 3 percent, and our n value would just be one, so the final equation is:

2000(1.03)^t

First, let's evaluate t for 1, as in one year.

2000 * 1.03^1 = 2000 x 1.03 = 2060

Two years: 2000 * 1.03 squared = 2121.80

Three years: 2000 * 1.03^3 = 2185.45!

Hope this helps!

8 0
2 years ago
After distributing the terms (3x - 7) (2x + 5), you get a new expression of the form
jeka57 [31]
First multiply (3x-7) and (2x+5)
i already did the multiplication so i am writing the answer
(3x-7)(2x+5)
6x^2+x-35

a is 6
b is 1
c is -35

if you want me to share how i did the multiplication then do let me know
6 0
1 year ago
I need help on letter b!
Likurg_2 [28]

40 of the toys weren't dolls. The reason why is 5/8 times 64 is equal to 40.

7 0
3 years ago
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