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ella [17]
3 years ago
6

Please help me!!!!!!!!!!i need to finish by tonight!!

Mathematics
1 answer:
Viktor [21]3 years ago
4 0
Number 3.
opens up
vertex (1,2)
idk maybe because it is on the right side. its positive

number 4.
opens up as well
Vertex (-2,0)
no because it is negative and on the left. Idk just a guess for this one
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Bob bought a boat for $20.00 and sold it at a loss of $8.00. What was the selling price?
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The distance d of a particle moving in a straight line is given by d(t) = 2t3 + 5t – 2, where t is given in seconds and d is mea
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Answer:

(C)6t^2+5

Step-by-step explanation:

Given the distance, d(t) of a particle moving in a straight line at any time t is:

d(t) = 2t^3 + 5t - 2, $ where t is given in seconds and d is measured in meters.

To find an expression for the instantaneous velocity v(t) of the particle at any given point in time, we take the derivative of d(t).

v(t)=\dfrac{d}{dt}\\\\v(t) =\dfrac{d}{dt}(2t^3 + 5t - 2) =3(2)t^{3-1}+5t^{1-1}\\\\v(t)=6t^2+5

The correct option is C.

6 0
3 years ago
Michael sells 136 newspapers each week. If there are 52 weeks in a year, how many newspapers does Michael sell in a year?
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Answer:

7,072

Step-by-step explanation:

136 times 52 = 7,072

6 0
3 years ago
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Francesca is looking at an airplane. She measures the angle at which she is looking up and finds it to be 55 degrees. If the air
lions [1.4K]
<h2>Answer:</h2>

Option: B is the correct answer.

                    B. 36,623 feet

<h2>Step-by-step explanation:</h2>

The angle of elevation is: 55 degree

We model this problem by taking a right angled triangle such that the side opposite to the 55 degree is of length 30000 feet.

Now let us consider x denote the distance of the plane from Francesa.

i.e. x denote the hypotenuse of the right angled triangle.

Hence, in right angled triangle i.e. ΔABC we have:

\sin 55=\dfrac{30000}{x}\\\\i.e.\\\\x=\dfrac{30000}{\sin 55}\\\\i.e.\\\\x=\dfrac{30000}{0.81915}\\\\\\i.e.\\\\\\x=36623.2376\ feet

Round to the nearest feet we get: x=36,623 feet

6 0
3 years ago
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What is the value of a and b?
prohojiy [21]
A = 34 x 2 = 68
b = 56/2 = 28

hope it helps
3 0
3 years ago
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