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2 years ago

I WILL MARK BRANLIEST IF U ARE RIGHT!!

Mathematics

1 answer:

adelina 88 [10]2 years ago

4 0

Answer:

Perimeter=100 area=688.19

Step-by-step explanation:

There's a big formula for area of pentagon and I pretty tired, so unless you want me to show my work I wont

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Solve. 90x = 27. Explain every step. Full credit will not be earned unless each step is explained.

alexira [117]

Answer: x= 0.3 or x=3/10

Step-by-step explanation:

90x=27

divide both sides by 90

x=27/90 which simplfiyes to 3/10

x=0.3

5 0

2 years ago

Read 2 more answers

Lf f(x) = -4x^2- 6x-1 and g(x) = -x^2 - 5x + 3, find (f- g)(x)

beks73 [17]

Answer:

f(x)=-4(x+3/4)^2-6x-1

Step-by-step explanation:

4 0

2 years ago

A second particle, Q, also moves along the x-axis so that its velocity for 0 £ £t 4 is given by Q t cos 0.063 ( ) t 2 v t( ) = 4

Vladimir79 [104]

Answer:

The time interval when $V_Q(t) \geq 60$ is at $1.866 \leq t \leq 3.519$

The distance is 106.109 m

Step-by-step explanation:

The velocity of the second particle Q moving along the x-axis is :

$V_{Q}(t)=45\sqrt{t} cos(0.063 \ t^2)$

So ; the objective here is to find the time interval and the distance traveled by particle Q during the time interval.

We are also to that :

$V_Q(t) \geq 60$ between $0 \leq t \leq 4$

The schematic free body graphical representation of the above illustration was attached in the file below and the point when $V_Q(t) \geq 60$ is at 4 is obtained in the parabolic curve.

So, $V_Q(t) \geq 60$ is at $1.866 \leq t \leq 3.519$

Taking the integral of the time interval in order to determine the distance; we have:

distance = $\int\limits^{3.519}_{1.866} {V_Q(t)} \, dt$

= $\int\limits^{3.519}_{1.866} {45\sqrt{t} cos(0.063 \ t^2)} \, dt$

= By using the Scientific calculator notation;

distance = 106.109 m

4 0

2 years ago

When adding 2/3 + 4/5, what step must be completed first?

Irina18 [472]

Answer:

you have to find the smallest common denominator

Step-by-step explanation:

so once the fractions have the same denominator you can add them easily and simplify

6 0

2 years ago

Plz help I'm just having a brain fart right now<br><br>

Wittaler [7]

Answer:

x=11

Step-by-step explanation:

For extra help the second answer is: 7a(3-a)

4 0

2 years ago