MATHEMATICS HIGH SCHOOL

Which expression is equal to 2√54 −4√24? ? A. √6 B. −√ 6 C. −√116 D. -26√

Answers

Answer 1

Answer:

Answer:

D : - 2 $√(6)$

Step-by-step explanation:

using the rule of radicals

• $√(ab)$ = $√(a)$ × $√(b)$

given

2 $√(54)$ - 4 $√(24)$

simplifying the radicals

$√(54)$

= $√(9(6))$

= $√(9)$ × $√(6)$

= 3 $√(6)$

$√(24)$

= $√(4(6))$

= $√(4)$ × $√(6)$

= 2 $√(6)$

Then

2 $√(54)$ - 4 $√(24)$

= 2(3 $√(6)$ ) - 4(2 $√(6)$ )

= 6 $√(6)$ - 8 $√(6)$

= - 2 $√(6)$

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Solve the equation x^2-4x-21=0

Answers

Answer:

x = 7 and x = -3

Step-by-step explanation:

x^2-4x-21=0

you can factor to get

(x-7)(x+3)=0

then set each equal to 0

x - 7 = 0 and x + 3 = 0

then just solve for x!

x = 7 and x = -3

What is the area of a sheet of binder paper? (Binder paper is 8 inches by 11 inches.)

Answers

88 inches is only divede and math

Solve the proportion. 10/a =15/30
a. 2
b. 5
c. 20
d. 10

Answers

multiply the denominators by 30a.
300=15a
a=20
so the correct answer is C

Only regular polygons with an even number of sides are symmetrical? True or false?

Answers

Answer:

The given statement:

Only regular polygons with an even number of sides are symmetrical is a FALSE STATEMENT.

Step-by-step explanation:

A symmetrical figure or a polygon means that if it is into halves such that the halves looks similar or match exactly then the figure is said to be symmetrical.

We know that a regular polygon with 'n' number of sides has exactly n number of axis of symmetry.

Hence, no matter whether the regular polygon has even number of sides or odd number of sides it will be symmetrical.

Answer: false

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