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skad [1K]
3 years ago
11

PLS HELP. I dont understand math

Mathematics
1 answer:
Anton [14]3 years ago
4 0

Answer:

a) 2 + 1 = 3

   4 + 2 = 6

   6 + 3 = 9

b) Yes

c) Yes, since you are adding b to two b, which results in 3b

Step-by-step explanation:

Hope that helps!

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A ball is thrown downward from a cliff. Its position at time t seconds is given by the formula s(t) = 16t2 + 32t, where s is in
Rom4ik [11]

Answer:

It takes 2.8 seconds for the ball to fall 215 ft.

Step-by-step explanation:

We are given a position function s(t) where s stands for the number of feet the ball has fallen, so we have to replace s with the given value of 215 ft and solve for the time t.

Setting up the equation.

The motion equation is given by

s(t) =16t^2+32t

We can replace there s = 215 ft to get

215=16t^2+32t

Solving for the time t.

From the previous equation we can move all terms in one side to get

16t^2+32t-215=0

At this point we can solve for t using quadratic formula.

t = \cfrac{-b\pm \sqrt{b^2-4ac}}{2a}

where a, b and c are the coefficients of the quadratic equation

at^2+bt+c=0

So we get

a=16\\b=32\\c=-215

Replacing on the quadratic formula we get

t = \cfrac{-32\pm \sqrt{32^2-4(16)(-215)}}{2(16)}

Using a calculator we get

t=-4.8 , t = 2.8

Physically speaking the only result that makes sense is to move forward in time that give us t = 2.8 seconds.

We can conclude that it takes 2.8 seconds for the ball to fall 215 ft.

3 0
3 years ago
Answer this please i don't really understand it so help me please lol.
expeople1 [14]

Answer:

11

Step-by-step explanation:

Step 1:

( 9 - 3 ) + 20 ÷ 4   Equation

Step 2:

6 + 20 ÷ 4     Subtract

Step 3:

6 + 5   Divide

Answer:

11    Add

<u>PEMDAS:</u>

<u>1. Parenthesis</u>

<u>2. Exponents</u>

<u>3. Multiplication</u>

<u>4. Division</u>

<u>5. Addition</u>

<u>6. Subtraction</u>

<u />

Hope This Helps :)

<u />

8 0
3 years ago
Read 2 more answers
Determine the domain of the function.<br><br> f(x)=4/x^2
harkovskaia [24]
Since x can be any value as long as the denominator equals 0 (it doesn't matter if it's positive or negative), we have to figure out when x^2=0, which is when x=0. Therefore, the domain is (-inf, 0) U (0, inf) 
3 0
3 years ago
In a section of a baseball stadium, there are 11 seats in the first row. There are 15 seats in the second row, 19 seats in the t
jok3333 [9.3K]

Answer:

A

Step-by-step explanation:

3 0
3 years ago
Help plz!!!!!!!!!!!!!!!!!!!!!!!!
melisa1 [442]
I got the last answer.

Y = 2x - 2


4 0
3 years ago
Read 2 more answers
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