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Rasek [7]
3 years ago
5

Carrie asked 50 randomly selected middle school students at king's high school about their favorite fast food item. twenty-one s

elected french fries. if there are 350 middle school students at king's high school, estimate how many will select french fries as their favorite fast food
Mathematics
1 answer:
laiz [17]3 years ago
7 0
21 french fries/50 total = x french fries/350 total
Cross Multiply: (21 · 350) = (50 · x)
Divide both sides by 50: (21 · 7) = x
                                           147  = x

Answer: 147 students
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Rectangle A has one side which is 6cm long and the other is (x+2)cm long. Rectangle Y has sides of length (2x+1) and 3cm, If the
gregori [183]
Hello, 

Rectangle A:           6cm                  (x+2)cm
Rectangle B:           3cm                  (2x+1)cm

The formula for the perimeter of a rectangle is: P=2(base+height)

Then:

P_A=2(b+h) \\ P_A=2*[6+(x+2)] \\ P_A=2*(x+8) \\ P_A=2x+16 \\  \\  \\ P_B=2(b+h) \\ P_B=2*[3+(2x+1)] \\ P_B=2*(2x+4) \\ P_B=4x+8


But we know that the perimeters are the same, so:

P_A=P_B \\ 2x+16=4x+8 \\ 8=2x \\ \boxed{x=4} \\  \\ Replacing:  \\  \\ Lenght\,\,of\,\,A=(x+2)cm\\ Lenght\,\,of\,\,A=(4+2)cm\\ \boxed{Lenght\,\,of\,\,A=6cm}\\  \\ Lenght\,\,of\,\,B=(2x+1)cm\\ Lenght\,\,of\,\,B=(2*4+1)cm\\ \boxed{Lenght\,\,of\,\,B=9cm}

With the answer of A, we realize that this figure is actually a square.
4 0
4 years ago
A car travels at an avarage speed of 52 miles per hour how many miles does it travel in 4 hours and 15 minutes
vichka [17]

Answer:221 miles

Step-by-step explanation:

4.25 x 52= 221

8 0
4 years ago
A buoy starts at a height of 0 in relation to sea level and then goes up. Its maximum displacement in either direction is 6 feet
svet-max [94.6K]

Answer:

h=6*sin(\frac{2\pi }{8}t)

Step-by-step explanation:

Since the buoy is going up and down, its motion is oscillatory, and therefore, it can be described by a trigonometric function.

The buoy starts at height of 0 in relation to the sea level, which means at time t=0, h=0, this tells us that trigonometric function modeling the buoy must be the sine function since for

h=A*sin(wt), at   t=0, h=0.

The maximum displacement of the buoy in either direction is 6 feet, this means we have

h=6*sin(wt)

now we need to figure out w.

The time it takes the buoy to get from its lowest point to its highest point is 4 seconds, that means the period T of oscillation is 2*4=8 seconds. The buoy returns to to the same place after one period, this means if the buoy started from 0, it will return to 0 after 8 seconds; therefore, from h=6*sin(wt) the we have:

wT=2\pi

w(8)=2\pi \\\\\boxed{w=\frac{2\pi }{8} }

Now the final equation looks like

h=6*sin(\frac{2\pi }{8}t)

8 0
3 years ago
Read 2 more answers
Thanks for the help :)
aliina [53]
Your welcome I’m glad to help out
8 0
3 years ago
HELP ON HOMEWORK PLS
Akimi4 [234]

Answer:

∠LPN = 57°

Step-by-step explanation:

arc LMN = 360° - 102° - 144° = 114°

∠LPN = 114°/2 = 57°

7 0
3 years ago
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