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3 years ago

13

The distance possible to sea on a clear day varies directly as the square roo of the height of six metres above sea level, it is

possible to see 10km. what distance can see from a height of 54m?

1 answer:

Natali [406]3 years ago

4 0

Answer:

90 km is the answer of your question

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Simplfy 4y-6(4z-5y)-4z

victus00 [196]

The correct answer: −18y−40

6 0

3 years ago

which ordered pair is a solution to the system of linear equations 1/2 x - 3/4 y = 11/60 and 2/5 x + 1/6 y = 3/10?

bekas [8.4K]

Value of $x=\frac{2}{3}\,\,and\,\,value\,\,of\,\,y=\frac{1}{5}$

Solution set is $(\frac{2}{3},\frac{1}{5})$

Step-by-step explanation:

We need to solve the following system of equations:

$\frac{1}{2}x-\frac{3}{4}y=\frac{11}{60}\,\,\,eq(1)\\\frac{2}{5}x+\frac{1}{6}y=\frac{3}{10}\,\,\,eq(2)$

We can solve this using Substitution.

Isolate x in $\frac{1}{2}x-\frac{3}{4}y=\frac{11}{60}$

$\frac{1}{2}x=\frac{11}{60}+\frac{3}{4}y\\ x=\frac{11}{30}+\frac{3}{2}y$

Putting value of x in equation(2)

$\frac{2}{5}(\frac{11}{30}+\frac{3}{2}y)+\frac{1}{6}y=\frac{3}{10}\\Solving:\\Taking\,\,LCM\,\,of\,\,5,6,10 \,\,we\,\,get: 30\\Multiply\,\,by\,\,LCM\\\frac{2}{5}(\frac{11}{30}+\frac{3}{2}y)\times30+\frac{1}{6}y\times30=\frac{3}{10}\times30\\Simplifying:\\12(\frac{11}{30}+\frac{3}{2}y)+5y=9\\\frac{22}{5}+18y+5y=9\\23y=9-\frac{22}{5}\\23y=\frac{45-22}{5}\\23y=\frac{23}{5}\\y=\frac{\frac{23}{5} }{23}\\y=\frac{1}{5}$

Putting value of y=1/5 in $x=\frac{11}{30}+\frac{3}{2}y$

$x=\frac{11}{30}+\frac{3}{2}\times\frac{1}{5} \\x=\frac{11}{30}+\frac{3}{10}\\x=\frac{11+3*3}{30}\\x=\frac{11+9}{30} \\x=\frac{20}{30}\\x=\frac{2}{3}$

So, value of $x=\frac{2}{3}\,\,and\,\,value\,\,of\,\,y=\frac{1}{5}$

Solution set is $(\frac{2}{3},\frac{1}{5})$

Keywords: System of linear Equations

Learn more about System of linear Equations at:

#learnwithBrainly

5 0

4 years ago

Tell whether the given statement is true or false. Explain your choice. No irrational numbers are whole numbers

andreyandreev [35.5K]

True. Every irrational number is included in the set of real numbers.

The irrational numbers are a subset of the real numbers.

4 0

3 years ago

Plz help me with 3 of those questions

tatiyna

7. She is not correct. The simplification of this expression is 22a-32.

8. She is correct. The simplification of this expression is 4a-10.

The last one is tricky because I honestly do not know how to do it but you can google It.

I hope that it helped some though

4 0

4 years ago

♡♡♡♡♡♡please help♡♡♡♡♡♡♡

MA_775_DIABLO [31]

Answer:

acute angle

Step-by-step explanation:

<h2>Find the angle</h2>

-an acute angle is less that 90 degrees

-straight angle is 180 degrees

-right angle is 90 degrees

-obtuse angle is an angle more than 90 degrees but less than 180 degrees

by looking at these definitions and the image of the angle . we can notice that the angle is less than 90 degrees hence its an <u>acute angle </u>

7 0

3 years ago

Read 2 more answers