Solve this problem using estimation.Melissa bought 18 cupcakes and 2 gallons of fruit punch for her Valentine party. If the cupcakes cost $.33 each and the punch costs $2.78 a gallon, estimate the cost of the cupcakes.

Answers

Answer 1

Answer: If she bought 18 cupcakes at $0.33 each, and 2 gallons of punch at $2.78 each, then Melissa have spent $11.50 overall for the cupcakes.

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(please help.) (I screenshot the question and choices )

Answers

The second answer on the list is the correct one.

A camera rental company charges a fixed amount plus a fee based on the number of days for which the camera is rented. The graph below shows the amount paid for a different number of days to rent the camera: A graph titled Camera Rentals plots the Number of Days on the x axis and the Amount in dollars on the y axis. A straight line joins the ordered pairs 0, 40 and 4, 120.

What is the fixed amount charged?

$20
$30
$40
$80

Answers

Answer:

$40

Step-by-step explanation:

We are given two points (0, 40) and (4, 120).

Now to find the equation which represents A graph titled Camera Rentals plots the Number of Days on the x axis and the Amount in dollars on the y axis.

To Find equation we will use two point slope form.

Formula: $y-y_1=(y_2-y_1)/(x_2-x_1)(x-x_1)$

$(x_1,y_1)=(0,40)$

$(x_2,y_2)=(4,120)$

Substitute the values in the formula

$y-40=(120-40)/(4-0)(x-0)$

$y-40=(80)/(4)x$

$y-40=20x$

$y=20x+40$

The equation represents the situation : $y=20x+40$

where x is the number of days

y is the Amount in dollars

Now we are supposed to find the fixed amount charged.

So, we need to substitute x i.e. number of days=0

So, $y=20(0)+40$

$y=40$

Hence the fixed amount charged is $40.

Given:
x y
0 40
4 120

y = fixed amount + v(x)
y = 40 + v(0)
y = 40

y = 40 + v(x)
120 = 40 + v(4)
120 - 40 = v(4)
80 = v(4)
80/4 = v
20 = v

y = 40 + 20x

The fixed amount charged is 40.

The variable amount is 20 per day.

A tram moved 9 meters per second for 27 seconds. What was the total change in the trams elevation?

Answers

Answer:

243

Step-by-step explanation:

first of all you got to multiply 9 by 27 which gives you 243

Solve quadratic equation by completing the square
x²+2x-15=0

Answers

$x^2+2x-15=0\n\nx^2+2x\cdot1+1^2-1^2=15\n\n(x+1)^2-1=15\n\n(x+1)^2=15+1\n\n(x+1)^2=16\iff x+1=4\ or\ x+1=-4\n\nx=4-1\ or\ x=-4-1\n\n\underline{\underline{x=3\ or\ x=-5}}$

PLEASE HELP!!! 50 POINTS!! WILL GIVE BRAINLIEST!!!A person standing at the top of Mountain Everest would be approximately 5.5 mi high. The radius of earth is 3959 mi.

What is the distance to the horizon from this point?

Enter your answer as a decimal in the box. Round only your final answer to the nearest tenth.
PLZ SHOW WORK!!!

Answers

Answer:

208.8 mi

Step-by-step explanation:

Form a triangle with the centre of the Earth (C) at one point, the horizon (H) as a second point, and the top of Mt. Everest (O) as the third (see diagram).

Let

r = Earth’s radius

h = height of Mt Everest

d = distance to horizon

∆CHO is a right triangle.

d² + r² = (r+h)²

d² + 3959² = (3959+5.5)²

d² + 15 673 681 = 3964.5²

d² + 15 673 681 = 15 717 260 Subtract 15 673 681 from each side

d² = 43 579 Take the square root of each side

d = 208.8 mi

The distance from the top of Mt Everest to the horizon is 208.8 mi.

Answer:

I JUST TOOK THE TEST THE ANSWER IS CORRECT.

Step-by-step explanation:

208.8

PLEASE ANSWER ASAP IF YOU KNOW THIS :D Kim earns $30 for babysitting on Friday nights. She makes an average of $1.25 in tips per hour. Write the function of Kim's earnings, and solve for how much she would make after 3 hours.a. y = 1.25x + 30; $33.75
b. y = 30x + 1.25; $43.75
c. y = 30x + 1.25; $91.25
d. y = 1.25x + 30; $31.25

Answers

y = 1.25x + 30....after 3 hrs
y = 1.25(3) + 30
y = 3.75 + 30
y = 33.75

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