All categories

3 years ago

Sarina throws a ball up into the air, and it falls on the ground nearby. The ball's

Mathematics

2 answers:

Anuta_ua [19.1K]3 years ago

8 0

Answer:

Option C.

Step-by-step explanation:

It is given that the ball's height, in feet, is modeled by the function

$f(x)=-x^2-x+3$

where, x represents time in seconds.

We need to find the height of the ball when Sarina throws it. It means, we need to find the initial height of the ball.

Substitute x=0 in the given function, to find the initial height.

$f(0)=-(0)^2-(0)+3$

$f(0)=0+0+3$

$f(0)=3$

The height of the ball is 3 feet when Sarina throws it.

Therefore, the correct option is C.

konstantin123 [22]3 years ago

3 0

Answer:

C C) 3 feet

Step-by-step explanation:

You might be interested in

Rewrite the system of linear equations as a matrix equation AX = B.

iren2701 [21]

Answer:

$\left[\begin{array}{ccc}1&2&5\\1&1&1\\4&6&5\end{array}\right]*\left[\begin{array}{ccc}x1\\x2\\x3\end{array}\right]=\left[\begin{array}{ccc}5\\6\\7\end{array}\right]$

Step-by-step explanation:

Let's find the answer.

Because we have 3 equations and 3 variables (x1, x2, x3) a 3x3 matrix (A) can be constructed by using their respectively coefficients.

Equations:

Eq. 1 : x1 + 2x2 + 5x3 = 5

Eq. 2 : x1 + x2 + x3 = 6

E1. 3 : 4x1 + 6x2 + 5x3 = 7

Coefficients for x1 ; x2 ; x3

From eq. 1 : 1 ; 2 ; 5

From eq. 2 : 1 ; 1 ; 1

From eq. 3 : 4 ; 6 ; 5

So matrix A is:

$\left[\begin{array}{ccc}1&2&5\\1&1&1\\4&6&5\end{array}\right]$

And the vector of vriables (X) is:

$\left[\begin{array}{ccc}x1\\x2\\x3\end{array}\right]$

Now we can find the resulting vector (B) using the 'resulting values' from each equation:

$\left[\begin{array}{ccc}5\\6\\7\end{array}\right]$

In conclusion, AX=B is:

$\left[\begin{array}{ccc}1&2&5\\1&1&1\\4&6&5\end{array}\right]*\left[\begin{array}{ccc}x1\\x2\\x3\end{array}\right]=\left[\begin{array}{ccc}5\\6\\7\end{array}\right]$

7 0

4 years ago

in a company, 80% of the workers are men. If 1,020 people work for the company who arent men, how many workers are there in all

DIA [1.3K]

Answer:

26,000 workers all together

6 0

3 years ago

He mixes 8 cups of water with glue if he wants to make a double batch how many quarts of water does he need how much water is th

Olegator [25]

Answer: 1 gallon

8 cups * 2=16 cups

16 cups= 4 quarts

4 quarts= 1 gallon

6 0

3 years ago

Richard simplified an expression in three steps, as shown:

soldi70 [24.7K]

Answer:

Step 2 because Richard multiply the powers of same base in denominator instead adding powers of same base.

Step-by-step explanation:

We are given that Richard simplified an expression in threes steps

We have to find the incorrect step in simplification of Richard

Step 1: all the exponent are multiplied by 3

$\frac{x^{-4}y^2}{yx^2\cdot x^2y^{-4}}^{3}=\frac{x^{-12}y^6}{y^3x^6\cdot x^6y^{-12}}$

Step 2:The exponents in the denominator are multiplied

$\frac{x^{-12}y^6}{y^3x^6\cdot x^6 y^{-12}}=\frac{x^{-12}y^6}{x^{12}y^{-9}}$

Step 3:The exponents of the same base are subtracted during division

$\frac{x^{-12}y^6}{x^{12}y^{-9}}=x^{-12-12}y^{6+9}$

$=x^{-24}y^{15}$

Richard makes mistake in step 2 when we multiply then power of same base should be added but Richard multiply the powers of same base in denominator.

4 0

4 years ago

So this one really confuses me, it may be easy for you guys though. So, a magical square 3x3 with 8 numbers 1/4 - 2 going by fra

ddd [48]

Answer:

Another is that I tried to divide my number equally so they add up to my number. ... You can find this number by using a simple math formula, where n = the number ... Actually, all 3x3 Magic Squares have an identical structure. ... 3x3 Magic Square 2 7 6 9 5 1 4 3 8 There are three types of magic squares: 1) ...

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers