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3 years ago

Simplify the given expression. Write your answer with positive exponents.

Mathematics

1 answer:

irina [24]3 years ago

4 0

Answer:

heres your answer

Step-by-step explanation:

here you go miss.

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Is sarah faster than Katie? and what is the average rate?

slamgirl [31]

Step-by-step explanation:

here's the solution: -

Average time taken by sarah :

=》

$\frac{79 + 70 + 68 + 75 + 69 + 64 + 69 + 75 + 64 + 76}{10}$

=》

$\frac{709}{10}$

=》

$70.9$

average time taken by sarah = 70.9 seconds

now,

average time taken by katie :

=》

$\frac{ 79 + 79 + 76 + 81 + 89 + 76 + 64 + 85 + 82 + 78}{10}$

=》

$\frac{789}{10}$

=》

$78.9$

average time taken by katie = 78.9 seconds

so, sarah is more efficient (faster) than katie.

i agree with sarah.

cuz, she took less time than katie.

7 0

3 years ago

Read 2 more answers

Someone plz help this is due today

-Dominant- [34]

3x+5x+1=17

x=2

y=5•2+1

y=1

(x, y)=(2, 11)

3x+2(4x+5)=43

x=3

y=4•3+5

y=17

(x, y)=(3, 17)

I think I did it right and I hope I helped you

3 0

2 years ago

A school play sells adult and child tickets. On Friday they sold 55 child tickets and 20 adult tickets for $200. On Saturday the

Anarel [89]

Answer:

Step-by-step explanation:

Let, price of individual child ticket is $x, and price of individual adult ticket is $y.

Now, on Friday we can write an equation is 55x+20y=200....(1).

and on Saturday we can write an equation is 72x+36y=306.....(2).

so, Equation 1: 55x+20y=200

Equation 2: 72x+36y=306

now, we are going to solve both equations.

after solving you will find x=2 and y=4.5

Hence, we can say that the cost of child ticket is $2, and the cost of adult ticket is $4.50.

4 0

3 years ago

Mr.Chen is putting tiles down in his kitchen.The kitchen has a perimeter of 48 feet.The tile costs $5 per square foot.How much w

Y_Kistochka [10]

It'll cost Mr. Chen $720 to tile his kitchen.

7 0

3 years ago

Read 2 more answers

Laboratory experiment shows that the life of the average butterfly is normally distributed with a mean of 18.8 days and a standa

inessss [21]

Answer:

a) 0.4164

Step-by-step explanation:

Mean lifespan (μ) = 18.8 days

Standard deviation (σ) = 2 days

For any given lifespan 'X', the z-score is:

$z=\frac{X- \mu}{\sigma} \\z=\frac{X- 18.8}{2}$

For X=12.04 days:

$z=\frac{12.04 - 18.8}{2} \\z=-3.38$

A z-score of -3.38 falls in the 0.036-th percentile of a normal distribution.

For X=18.38 days:

$z=\frac{18.38 - 18.8}{2} \\z=-0.21$

A z-score of -3.38 falls in the 41.68th percentile of a normal distribution.

The probability that a butterfly lives between 12.04 and 18.38 days is

$P=41.68-0.036\\P=41.64\%\ or\ 0.4164$

6 0

3 years ago