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3 years ago

Which of these is a rational number?

Mathematics

1 answer:

adell [148]3 years ago

6 0

Answer:

√16

Step-by-step explanation:

√15=√(3·5)

√16=√4²=4

√21=√(3·7)

√22=√(2·11)

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The lengths of two sides of a right triangle are 5 inches and 8 inches . What is the difference between two possible lengths of

Cloud [144]

by using Pythagoras theorem,

third side will be either 8^2+5^2=sqrt(64+25)=sqrt(89)=9.43 or

8^2-5^2=sqrt(64-25)=sqrt(39)=6.24

the difference is=9.43-6.24=3.19inches i think this is it i may have messed up

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4 years ago

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Step-by-step explanation:

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3 years ago

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Andreyy89

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3 years ago

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In accute triangle abc side a=10, side b=12 and angle a is 42. Find angle b to the nearest degree

Lena [83]

A triangle has 3 sides and 3 angles. The triangle involve is an acute triangle. This means that the rest of the angles in the triangle is acute. Acute angles are angles with measurement blow 90 degrees. To solve this problem we use the Sin Law. The ratio of the side and sine of the angle apposite to the side is constant. 10/sin(42) = 12/sin(x). Solve for x.
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4 years ago

the sum of two numbers is 52. their difference is 9. write and solve system of equations to find the 2 numbers

sergiy2304 [10]

Hey there :)

Let us first translate words into mathematics!

Sum of 2 numbers is 52
x + y = 52

Difference of 2 numbers is 9
x - y = 9

(eq.1) x + y = 52
(eq.2) x - y = 9
Add both equations : x + y = 52
+ x - y = 9
2x = 61
x = 30.5
We now have the value of x, substitute into eithe formulae to find y
x - y = 9 , 30.5 - y = 9 , 30.5 - 9 = y , 21.5 = y
x + y = 52 , 30.5 + y = 52 , 52 - 30.5 = y , 21.5 = y

x = 30.5
y = 21.5

3 0

4 years ago