I REALLY NEED HELP ON THIS, PLEASE!!!!

Answers

Answer 1

Answer: 1. $2d+3$

2.
$n\cdot 7\n7n$

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Justin ordered 6 pizzas. Each pizza costs $10.95. How much will he need to pay?
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The pressure P, of a gas varies inversely with its volume, V. Pressure is measured in units of Pa. Suppose that a particular amount of a gas is initially at a pressure of 84 Pa at a volume of 36 L. If the volume is expanded to 216 L, what will the new pressure be?

How do you find a constant rate of change?

Answers

Answer:

Rate of change is most commonly defined as "the change in y over the change in x", or "how much does y change when x is changed by 1 unit".

Step-by-step explanation:

How do I convert Y= x^2 + 3x + 1 into vertex form?

Answers

Answer:

y = (x + $(3)/(2)$ )² - $(5)/(4)$

Step-by-step explanation:

The equation of a parabola in vertex form is

y = a(x - h)² + k

where (h, k) are the coordinates of the vertex and a is a multiplier

To obtain this form use the method of completing the square.

Given

y = x² + 3x + 1

add/ subtract ( half the coefficient of the x- term )² to x² + 3x

y = x² + 2( $(3)/(2)$ )x + $(9)/(4)$ - $(9)/(4)$ + 1

= (x + $(3)/(2)$ )² - $(5)/(4)$

If a 12-sided regular polygon rotates about its center, at which angle of rotation will the image of the polygon coincide with the preimage?75°

45°

36°

30°

Answers

Central angle of a 12-sided regular polygon:
360° : 12 = 30°
Answer: D ) 30°

the answer is

d=30 degrees

Find the constant of variation k for inverse variation. Then write an equation for the inverse variation. y= 5 when x = 7.5 k = 37.5;y = 37.5/x k = 15;xy = 1.5 k = 2.5;y = 2.5/x k = 37.5;y=37.5x

Answers

direct variation has this formula: y = kx
inverse variation has this formula: y = k/x

y = 5 ; x = 7.5 ; k = 37.5

y = k/x ⇒ 5 = 37.5 / 7.5 ⇒ y = 37.5/x

Answer:k=37.5 ; xy=37.5

Step-by-step explanation:

A circle has a radius of 5 meter. What is the length of the arc that is captured by a central angle that measures 120 degrees? Round your answer to the nearest tenth.a) 3.33 meters
b) 31.42 meters
c) 10.47 meters
d) 2.09 meters

Answers

The length of the arc captured by a central angle of 120 degrees in a circle with a radius of 5 meters is approximately 10.47 meters. Hence, the correct answer is an option (c) 10.47 meters.

What is an arc?

Arc is the measure of the angle on the circumference of a circle.

Length of an Arc = θ × (π/180) × r

Here,
The length of an arc of a circle with radius r and central angle θ (in radians) is given by the formula:

Length of arc = r × θ

To use this formula, we need to convert the given central angle of 120 degrees to radians:

θ = (120/180) × π = 2/3 × π

Now, we can substitute the given values into the formula to get the length of the arc:

Length of arc = 5 × (2/3 × π) = (10/3) × π ≈ 10.47 meters

Therefore, the length of the arc captured by a central angle of 120 degrees in a circle with a radius of 5 meters is approximately 10.47 meters. Hence, the correct answer is an option (c) 10.47 meters.

Learn more about arcs here:

brainly.com/question/29218755

#SPJ3

Well, the formula for the length of an arc is;
n⁰ × 2πr
360
Where; n⁰ is the angle
π is pie, which is 22/7 or 3.143 approximately
and r is the radius

Anyway, according to the question;
n⁰ is 120⁰
and r is 5 meters. And as you know, the pie is 22/7. So that will be

120⁰/360 x 2 x 22/7 x 5
And that will give you 10.47metres. Which is approximately 11 metres. Hope i helped, have a nice day

A music festival charges $54.95 per ticket sold on the day of the event. A ticket purchases before the festival costs only $39.95. They were 20,000 tickets sold for a total of 925,000. How many tickets did they sell at the music festival? How many tickets do they sell before the music festival?

Answers

b=number of ticets sold before
a=number of tickets sold after

cost of a ticket=number of tickets times cost per ticket
beforecost=39.95b
aftercost=54.95a

total cost=925000
39.95b+54.95a=925000

total number tickets=20000
b+a=20000

we have

39.95b+54.95a=925000
b+a=20000
multiply second equation by -39.95 and add to first equatin
39.95b+54.95a=925000
-39.95b-39.95a=-799000 +
0b+15a=126000

15a=126000
divide bot sides by 15
a=8400

sub back
b+a=20000
b+8400=20000
minus 8400 both sides
b=11600

11,600 tickets sold before
8400 tickets sold after