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Katyanochek1 [597]
3 years ago
8

(Will give Brainliest) These are composite figures. find the area of the figure and round your answer to one decimal place if ne

cessary.

Mathematics
1 answer:
stiv31 [10]3 years ago
7 0

Answer:

400

Step-by-step explanation:

this is most likely wrong cuz im dum

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Which value, when placed in the box, would result in a system of equations with infinitly many solutions? Y=2x - 5 2y-4x=
Nezavi [6.7K]

Given:

The system of equations is

y=2x-5

2y-4x=?

To find:

The missing value for which the given system of equations have infinitely many solutions.

Solution:

Let the missing value be k.

We have,

y=2x-5

2y-4x=k

Taking all the terms on the left side, the given equations can be rewritten as

-2x+y+5=0

-4x+2y-k=0

The system of equations a_1x+b_1y+c_1=0 and a_2x+b_2y+c_2=0 have infinitely many solutions if

\dfrac{a_1}{a_2}=\dfrac{b_1}{b_2}=\dfrac{c_1}{c_2}

We have,

a_1=-2,b_1=1,c_1=5

a_2=-4,b_2=2,c_2=-k

Now,

\dfrac{-2}{-4}=\dfrac{1}{2}=\dfrac{5}{-k}

\dfrac{1}{2}=\dfrac{1}{2}=\dfrac{5}{-k}

\dfrac{1}{2}=\dfrac{5}{-k}

On cross multiplication, we get

-k=10

k=-10

Therefore, the missing value is -10.

6 0
3 years ago
Butch washes half of his kitchen floor in 1/4 hour. His kitchen floor is 120 square feet. What is an equivalent unit rate?
PtichkaEL [24]
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He washes 60 sq ft in 1/4 of an hour. Multiply 60 by 4 and you get 240 per hour
3 0
3 years ago
a rare coin was bought for $30.00 2 years ago.It is now worth $75.00 . What is the percent increase in worth?​
Vera_Pavlovna [14]

Answer:

100% +100%= 60+100%=90 - 50% is 75 so 250%

Step-by-step explanation:

8 0
3 years ago
Which expression is equivalent to
Elan Coil [88]

Hey there!

(a^8)^4

= a^(8)(4)

8(4) = 32

= a^32

Answer: a^32

Good luck on your assignment and enjoy your day!

~Amphitrite1040:)

3 0
3 years ago
A statistic is said to be unbiased if
xxMikexx [17]

Answer:

A statistic is said to be unbiased if the mean of its sampling distribution is equal to the true value of the parameter being estimated.

Step-by-step explanation:

A parameter is a number that describes the population.  

A statistic is a number that describes a sample.  

A statistic used to estimate a parameter is unbiased if the mean of its sampling distribution is exactly equal to the true value of the parameter being estimated. For example, the mean of a sample is an unbiased estimate of the mean of the population from which the sample was drawn.

A statistic is biased if its expected value is not equal to the parameter.

8 0
3 years ago
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