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2 years ago

An experiment involves selecting a numbered chip, some black and some white, from a bag of

Mathematics

1 answer:

Nezavi [6.7K]2 years ago

7 0

Answer:

4/9

Step-by-step explanation:

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PLZ help i do know the answer to this already from another brainly question but i just would like to understand how its solved s

amm1812

Answer:

66.56 cm

Step-by-step explanation:

<u>The figure consist of:</u>

1. A rectangle with sides 10 cm and 17 cm
2. A quarter circle

<u>The perimeter is:</u>

P = 1/4C + 2*10 + 17 + (17 - 8) + 8
P = 1/4*2*3.14*8 + 54 = 66.56 cm

4 0

2 years ago

Experiments on learning in animals sometimes measure how long it takes a mouse to find its way through a maze. The mean time is

Sladkaya [172]

Answer:

Option A.

Step-by-step explanation:

In an experiment a mouse took the mean time to find its way through a maze = 18 seconds.

So the mean time μ = 18

So null hypothesis says,

H₀ : μ = 18

Then a researcher thought that the mice can complete the maze faster than the time taken earlier.

So he thinks mean time taken by 10 mice will be less than 18 seconds.

Or μ < 18

Alternate hypothesis says will be

Hₐ : μ < 18

Therefore, null hypothesis and alternate hypothesis will be

H₀ : μ = 18

Hₐ : μ < 18

Option A. will be the answer.

4 0

2 years ago

A rectangular piece of metal is 25 in longer than it is wide. Squares with sides 5 in long are cut from the four corners and the

Licemer1 [7]

Answer:

The original length was 41 inches and the original width was 16 inches

Step-by-step explanation:

Let

x ----> the original length of the piece of metal

y ----> the original width of the piece of metal

we know that

When squares with sides 5 in long are cut from the four corners and the flaps are folded upward to form an open box

The dimensions of the box are

$L=(x-10)\ in\\W=(y-10)\ in\\H=5\ in$

The volume of the box is equal to

$V=(x-10)(y-10)5$

$V=930\ in^3$

$930=(x-10)(y-10)5$

simplify

$186=(x-10)(y-10)$ -----> equation A

Remember that

The piece of metal is 25 in longer than it is wide

$x=y+25$ ----> equation B

substitute equation B in equation A

$186=(y+25-10)(y-10)$

solve for y

$186=(y+15)(y-10)\\186=y^2-10y+15y-150\\y^2+5y-336=0$

Solve the quadratic equation by graphing

using a graphing tool

The solution is y=16

see the attached figure

Find the value of x

$x=16+25=41$

therefore

The original length was 41 inches and the original width was 16 inches

3 0

3 years ago

In the first half of a basketball game, a player scored 9 points on free throws and then scored a number of 2-point shots. In th

irinina [24]

I had this same question yesterday it was c 2x+3x+9x

6 0

3 years ago

Read 2 more answers

Find a measure of each angle indicated

mash [69]

Answer:

127 degrees.

Step-by-step explanation:

These angles are corresponding angles so they have the same measurement.

6 0

2 years ago

Read 2 more answers