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1 year ago

Will Mark Brainlist!! :)

Mathematics

1 answer:

Sophie [7]1 year ago

7 0

Answer:

choice a hope it helps

Step-by-step explanation:

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Someone help? Number 7 for brainliest.

tatuchka [14]

Answer:

The radius is 7.23units

Step-by-step explanation:

Check image below for solution

4 0

2 years ago

A party rental company has chairs and tables for rent. The total cost to rent 2 chairs and 12 tables is $83. The total cost to r

vfiekz [6]

Answer:

Cost to rent each chair: $2.50

Cost to rent each table: $6.50

Step-by-step explanation:

2x+12y=83

5x+3y=32

x=2.5

y=6.5

6 0

2 years ago

Which pairs of numbers has have a greatest common factor of 7

vodomira [7]

14

need more letters

8 0

3 years ago

Frank is going to buy some ties

Fudgin [204]

Answer:

6 shirts

Step-by-step explanation:

The cost of a shirt and 2 ties is ...

$18.50 +2(7.50) = $33.50

For $205, Frank can buy $205/$33.50 = 6.12 sets of shirt and ties.

Frank can buy 6 shirts (and 12 ties) for an amount less than $205.

_____

<em>Additional comment</em>

Frank's cost will be $201 for that purchase.

3 0

2 years ago

The amount of time Ricardo spends brushing his teeth follows a Normal distribution with unknown mean and standard deviation. Ric

Papessa [141]

Let $X$ denote the number of minutes spent brushing his teeth, and let $\mu$ be the mean and $\sigma$ the standard deviation for this distribution.

$\mathbb P(X$

The z-score corresponding to this probability is approximately $z=-0.2533$ , which means

$\dfrac{1-\mu}\sigma=-0.2533\iff\mu-0.2533\sigma=1$

Next, (note the sign change)

$\mathbb P(X>2)=0.02\implies\mathbb P(X\le2)=\mathbb P\left(\dfrac{X-\mu}\sigma\le\dfrac{2-\mu}\sigma\right)=0.98$

The corresponding z-score is approximately $z=2.0538$ , so you have

$\dfrac{2-\mu}\sigma=2.0538\iff\mu+2.0538\sigma=2$

Solving the two equations for $\mu$ and $\sigma$ , you'll find that the mean is approximately $\mu=1.1098$ and the standard deviation is approximately $\sigma=0.4334$ .

7 0

2 years ago