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deff fn [24]
3 years ago
9

I need help ASAP and giving brainlist

Mathematics
2 answers:
IgorLugansk [536]3 years ago
6 0

Answer:

-8, -10, -2

Step-by-step explanation:

Nuetrik [128]3 years ago
4 0

Answer:

-8, -10, -2 are your answers

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A ball is thrown into the air from a height of 9cm above the ground, and its height is given by S=128+32t-16t^2, where t is the
OverLord2011 [107]
-16t² + 32t + 128 = 0
-16t² + 64t - 32t + 128 = 0
-16t(t - 4) - 32(t - 4)
(-16t - 32)(t - 4) = 0
-16t -32 = 0      t - 4 = 0
-16t = 32          t = 4
t = -2

t = -2 and t = 4 are the values that makes S = 0.
Yes, because if you apply either of  these values alone, S will be 0.
6 0
3 years ago
What is the area of a desktop that is 2 1/2 feet by 5 feet?
Elden [556K]

The area of the desktop is 12. 5 feet square

<h3>How to determine the area</h3>

The formula for area of a rectangle;

Area = length × width

Length = 2. 5 feet

Width = 5 feet

Area = 2. 5 × 5

Area = 12. 5 feet square

Thus, the area of the desktop is 12. 5 feet square

Learn more about area of a rectangle here:

brainly.com/question/14137384

#SPJ1

3 0
1 year ago
Which of the following is the graph of y = 0.25csC(x+1)+1?
REY [17]
The graph should look like this

4 0
3 years ago
Read 2 more answers
3. Which of the following equations is equivalent to the equation shown below? x^2 + 4x + 15 = 0
stiv31 [10]

We need to expand the answer choices and see which one matches the equation

x^2+4x+15=0

Remember the algebraic rules:

(a\pm b)^2=a^2\pm2ab+b^2

Now, if we expand choice D, we should get this. Let's expand:

\begin{gathered} (x+2)^2=-11 \\ x^2+2(1)(2)+(2)^2=-11 \\ x^2+4x+4=-11 \\ x^2+4x+4+11=0 \\ x^2+4x+15=0 \end{gathered}

5 0
10 months ago
Wendy took a trip from one city to another, a distance of 500 mi. She traveled part of the way by bus, which arrived at the trai
Fynjy0 [20]

<u>Answer- </u>Wendy spent 3 hours on the train

<u>Solution-</u>

The distance between the cities= 500 mi.

She traveled part of the way by bus, and other part by train.

The bus averaged 40 mph, and the train averaged 120 mph.

The entire trip took 6.5 hours.

let d = distance traveled by train

the total distance was given as 500 mi ,

therefore, distance traveled by bus  = (500-d) mi

time = distance/speed

⇒ train traveling time + bus traveling time = 6.5 hrs

⇒ \frac{d}{120} +\frac{500-d}{40} = 6.5

⇒ d + 3(500-d) = 120(6.5)

⇒ d + 1500 - 3d = 780

⇒ 2d = 720

⇒ d = 360  mi

so d = 360 mi by train

⇒ 360/120 = 3 hrs on the train

8 0
3 years ago
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