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3 years ago

Use order of operation 3³ - (60 ÷ 10) + 8

Mathematics

2 answers:

jeka943 years ago

4 0

3 To the square of three(60/10)+8

Vladimir [108]3 years ago

3 0

The answer is 29

First you do 60/10 which is 6
After you do 3 x 3 x 3 which is 27.
Then you subtract 27-6 which is 21.
Last you do 21+8 and you get 29

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PLEASE HELP, I don’t understand it at all!!

netineya [11]

Answer:

15km

Step-by-step explanation:

Use the Pythagorean Theorem

a²+b²=c²

9²+12²=c²

81+144=c²

225=c²

Square root both sides

c= 15km

7 0

2 years ago

Read 2 more answers

Proof by Contradiction : Show that √ 2 is irrational.

myrzilka [38]

Answer:

$\sqrt2$ is irrational

Step-by-step explanation:

Let us assume that $\sqrt2$ is rational. Thus, it can be expressed in the form of fraction $\frac{x}{y}$ , where x and y are co-prime to each other.

$\sqrt2$ = $\frac{x}{y}$

Squaring both sides,

$2 = \frac{x^2}{y^2}$

Now, it is clear that x is an even number. So, let us substitute x = 2u

Thus,

$2 = \frac{(2u)^2}{y^2}\\y^2 = 2u^2$

Thus, $y^2$ is even, which follows the fact that y is also an even number. But this is a contradiction as x and y have a common factor that is 2 but we assumed that the fraction $\frac{x}{y}$ was in lowest form.

Hence, $\sqrt2$ is not a rational number. But $\sqrt2$ is a an irrational number.

5 0

4 years ago

A horse drinks about 120 gallons of water every four days at this rate about how many gallons of water does a horse drink in 28

Alex17521 [72]

840 gallons of water

3 0

4 years ago

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What time is 7 1/2 hours before 2:12

Artist 52 [7]

6:42 pm bc subtract 2 hours is 12:12am and then subtract the rest is 7:12pm then you subract 12 minutes is 7 pm the subtract the 18 minutes left is 6:42 pm

3 0

3 years ago

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Which will result in a difference of squares?

otez555 [7]

Expanding the given expressions using Foil:

1)(–7x + 4)(–7x + 4) = $7x^{2}-28x-28x+16=49x^{2}-56x+16$