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AveGali [126]
2 years ago
10

Help please I don’t get it

Mathematics
2 answers:
ANEK [815]2 years ago
6 0

Answer:

12 m

Step-by-step explanation:

The area of a rectangle is length•width:

  • length=<em>x</em>
  • width=3\frac{2}{3}
  • area=44

We can set up an equation and solve for <em>x</em>:

  • <em>x</em>•3\frac{2}{3}=44
  • Divide– <em>x</em>=44/3\frac{2}{3}
  • Make improper fraction– <em>x</em>=44/\frac{11}{3}
  • Same, change, reciprocal– <em>x</em>=44•3/11
  • Multiply– <em>x</em>=12
mel-nik [20]2 years ago
3 0

Answer:

the missing length is 4.

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The boat travels x miles per hour from one island to another island in 2.5 hours. The boat travels 5 miles per hour faster on th
notka56 [123]
The speed to the island is x. The speed to return is x+5.

The distance is the same so, 2.5 multiplied by x = 2×(x+5).

It took 2.5 hrs to get there and 2 hrs to return. Now all we have to do is solve.

 2.5*x = 2x + 10

 .5x = 10
x=20

 Therefore, the distance between islands is 2.5 × 20 = 50 miles.

hope this helps!

6 0
3 years ago
Which is the equation of a line that is parallel to 2x + 5y = 4 and goes through the point (5, –4) ?
barxatty [35]

we know that

if two lines are parallel

then

their slopes are equal

Step 1

Find the slope of the line 2x + 5y = 4

2x + 5y = 4------> 5y=4-2x-----> y=(4/5)-(2/5)x------> slope m=(-2/5)

step 2

with m=-2/5 and the point (5, –4) find the equation of the line

y-y1=m*(x-x1)------> y+4=(-2/5)*(x-5)----> y=(-2/5)x+2-4

y=(-2/5)x-2

therefore

the answer is the option D

4 0
3 years ago
Read 2 more answers
3х - 5 = -11 what is x
Gennadij [26K]

Answer:

-2

Step-by-step explanation:

Add 5 to both sides to get

3x-5+5=-11+5

and simplify to get

3x = -6

x = -2

7 0
3 years ago
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Grain is falling from a chute onto the ground, forming a conical pile whose diameter is always three times its height. how high
bezimeni [28]

Given that grain is falling from a chute onto the ground, forming a conical pile whose diameter is always three times its height.

So if D is the diameter and h is the height of the conical pile then we can write:


D=3h

We know that diameter = 2r, where r is the radius

2r=3h

r=\frac{3h}{2}

Volume of conical pile is given by formula

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Given that volume is 1110 cubic feet.

Now plug the values of Volume and r into equation of volume

1110=\frac{1}{3}\pi (\frac{3h}{2})^2h

1110=\frac{1}{3}\pi\cdot\frac{9h^2}{4}\cdot h

1110=\pi\cdot\frac{3h^3}{4}

1110\cdot\frac{4}{3\pi}=h^3

471.098631552=h^3

take cube root of both sides

7.78103342467=h

Hence height is approx 7.78 feet.

7 0
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Dr. Jon planned to reward his class with candy because everyone got a A on the test. He surveyed every 4th student that entered
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This is an example of a systematic sample.

Dr. Jon developed a system in order to get a random sample. His plan was to survey the 4th student that entered his classroom.
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