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3 years ago

The spinner is divided into a equal sections which two events have the same probability

Mathematics

1 answer:

myrzilka [38]3 years ago

7 0

Answer:

its A

Step-by-step explanation:

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On a piece of paper, use a protractor to construct △ABC with m∠A=30° , m∠B=60° , and m∠C=90° .

pochemuha

Answer:

It's a right triangle.

Step-by-step explanation:

△ABC with m∠A=30° , m∠B=60° , and m∠C=90°

It's a right triangle.

6 0

3 years ago

8x-5y=21 simultaneous linear equation 2x+9y=-5

olya-2409 [2.1K]

Answer:

$x=2$ and $y=-1$

Step-by-step explanation:

If two equations are given, we can solve one of the equation in terms of single variable and put it in the other equation which will further give the value of x and y.

For the given equations:

$8x-5y=21$ Equation:1

$2x+9y=-5$ Equation:2

Solving equation multiply equation 2 with 4 on both the sides

$8x+36y=-20$ Equation 3

Subtracting Equation:3 from Equation:1

$8x-5y-(8x+36y)=21-(-20)\\8x-5y-8x-36y=21+20\\-41y=41\\y=-1$

Putting value of 'y' in Equation:2 which will give the value of x

$2x+9y=-5\\2x+9(-1)=-5\\2x-9=-5\\2x=4\\x=2$

8 0

3 years ago

What is the value of x?

Alexxandr [17]

Answer:

Step-by-step explanation:

2x+2=3x-52

-2x -2x

2=x-52

+52 +52

54=x

7 0

4 years ago

Diagram 5 shows a triangle ABD such that AD = 17 cm, AB = 10 cm and BD = 21 cm. The straight line AC is perpendicular to the str

OlgaM077 [116]

Answer:

Step-by-step explanation:

100 = x^2 + AC^2

17^2 = AC^2 + (21 - x)^2

289 = AC^2 + 21^2 + x^2 - 2*21*x

289 = AC^2 + 441 + x^2 - 42x

from 1st equation AC^2 + x^2 = 100

289 = 441 + 100 - 42x

289 = 541 - 42x

42x = 541 - 289 = 252

x = 252/42 = 6

so AC^2 = 100 - 6^2 = 100 - 36 = 64

AC = 8

7 0

3 years ago

Simplify the following surd expressions

AlexFokin [52]

Answer:

A) $\sqrt{2}$

B) $4\sqrt{11}$

Step-by-step explanation:

A) You can add these expression because they contain the same square root:

$6\sqrt{2} - 5\sqrt{2} = (6 - 5)\sqrt{2} =\sqrt{2}$

B) Same as above:

$\sqrt{11} + 3\sqrt{11} = (1 + 3)\sqrt{11} = 4\sqrt{11}$

3 0

3 years ago

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