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3 years ago

What is the value of 9^-1/2

Mathematics

2 answers:

qaws [65]3 years ago

7 0

Answer:

81-1/2

80/2

40 and right than say

Elden [556K]3 years ago

3 0

Answer:

$\frac{1}{3}$

Step-by-step explanation:

Using the rule of exponents/ radicals

$a^{-m}$ ⇔ $\frac{1}{a^{m} }$

$a^{\frac{1}{2} }$ ⇔ $\sqrt{a}$

Given

$9^{-\frac{1}{2} }$

= $\frac{1}{9^{\frac{1}{2} } }$

= $\frac{1}{\sqrt{9} }$

= $\frac{1}{3}$

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Find the square root of 13²

nadezda [96]

The answer to that would be “169”

3 0

3 years ago

Joan can pick 9 pounds of strawberries in one hour.

Law Incorporation [45]

It takes him 8 hours

8 0

3 years ago

What is the value of 7(x+4)² - 3x when x = 2?

sdas [7]

Answer: the value of 7x-y is -14.

Step-by-step explanation:

When x=2 and y=4,

To find the value of 7x - y when x =2, y = 4, this means when ever you see x, put 2 in replacement, y, put 4 respectively.

7x - y = 7(2 - 4)

14 - 28

= -14.

5 0

3 years ago

All of the expressions that have the same value as LaTeX: 892\div8892 ÷ 8. Group of answer choices LaTeX: 8920\div808920 ÷ 80 La

algol13

Answer:

$(a)$ $8920\div80$

$(e)$ $0.892\div0.008$

Step-by-step explanation:

Given

$892\div8$

Required

Select equivalent expression

$8920\div80$

$894\div10$

$89.2\div0.08$

$8.92\div0.8$

$0.892\div0.008$

Start by solving the given expression (using a calculator)

$892\div8$ $= 111.5$

Then we solve the given options (using a calculator)

$(a)$ $8920\div80$

$8920\div80$ $= 111.5$

$(b)$ $894\div10$

$894\div10$ $= 89.4$

$(c)$ $89.2\div0.08$

$89.2\div0.08$ $= 1115$

$(d)$ $8.92\div0.8$

$8.92\div0.8$ $= 11.15$

$(e)$ $0.892\div0.008$

$0.892\div0.008$ $= 111.5$

The equivalent expressions are (a) and (e)

5 0

3 years ago

The burges are moving across the country .Mr burges leaves 3 hours before mrs.burges. If he averages 50 mph and she averages 70

kirill [66]

10.5 hours

let t be time then distance travelled by both is

Mr Burges ⇔ d = 50t ( distance = speed × time )

Mrs Burges ⇒ d = 70(t - 3)

At the point of overtaking both will have travelled the same distance

equating their distance and solving for t

70(t - 3) = 50t

70t - 210 = 50t ( subtract 50t from both sides )

20t - 210 = 0 ( add 210 to both sides )

20t = 210 ( divide both sides by 20 )

t = 10.5 hours

4 0

3 years ago