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4 years ago

14

Suppose 240 nursing students took a certification test that is worth 140 points. The five-number summary for the scores is shown

here.
min. value = 68
Q1 = 110
median = 125
Q3 = 130
max. value = 138

About how many students had a score of 130 or less?
60
120
130
180

2 answers:

konstantin123 [22]4 years ago

6 0

The answer is 180 i just took the test

erma4kov [3.2K]4 years ago

5 0

Answer: D) 180

Step-by-step explanation: Here is a screenshot for proof!

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This morning, some dragons, horses, and chickens were playing in my backyard. I counted 15 heads, 50 legs, and 4 wings. How many

klasskru [66]

We are given

number of heads =15

we know that

any healthy dragon has three heads

horse has 1 head

chicken has 1 head

Let's assume

number of dragons is x

number of horses is y

number of chickens is z

so, we will get

first equation:

$3x+y+z=15$

number of legs =50

any healthy dragon has four legs

chicken has 2 legs

horse has four legs

so, we can get second equation as

$4x+4y+2z=50$

we can simplify it

$2(2x+2y+z)=50$

$2x+2y+z=25$

now, we can find third equation

dragon has two wings

horse has no wings

chicken has two wings

so, we will get third equations as

$2x+0y+2z=4$

now, we can simplify it

$2x+2z=4$

$2(x+z)=4$

$x+z=2$

so, we will get system of equations as

$3x+y+z=15$

$2x+2y+z=25$

$x+z=2$

now, we can use substitution

We can find for z from third equation

$z=2-x$

we can plug this in first equation

$3x+y+2-x=15$

now, we can solve for y

$2x+y+2=15$

$y=13-2x$

now, we can plug this z and y into second equation

$2x+2(13-2x)+2-x=25$

now, we can solve for x

$x-4x+26=23$

$-3x=-3$

$x=1$

now, we can find y and z

$y=13-2x$

we can plug x=1

$y=13-2*1$

$y=11$

$z=2-x$

we can plug x=1

$z=2-1$

$z=1$

Hence ,

number of dragons is 1

number of horses is 11

number of chicken is 1............Answer

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3 years ago

Jason used wire fencing to form a border around a circular region in his back yard. If the radius of the circular region was 5 y

stiks02 [169]

Answer:

The total length of the border is 31.4 yards rounded to the nearest tenth of a yard

Step-by-step explanation:

The formula of the circumference of a circle is C = 2πr, where r is the radius of the circle

Jason used wire fencing to form a border around a circular region in his back yard

<em>That means the length of the wire is equal to the circumference of the circular region</em>

∵ The radius of the circular region was 5 yards

∴ r = 5 yards

∵ C = 2πr

- Substitute r by 5

∴ C = 2π(5)

∴ C = 31.41592654 yards

- Round it to the nearest tenth of a yard

∴ C = 31.4 yards

∵ The length of the wire is equal to the circumference of

the circular region

∴ The length of the wire is 31.4 yards

The total length of the border is 31.4 yards rounded to the nearest tenth of a yard

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3 years ago

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madam [21]

Answer:idk

Step-by-step explanation:

idk

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4 years ago

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loris [4]

Answer:

Y is 1

step-by-step- explanation

y+2=3

1+2=3

Brainliest? yes/no

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3 years ago

Read 2 more answers

Y=3x + 4 please help solve

Troyanec [42]

What are you looking for?
y-int = (0,4)
x-int = $(-\frac{4}3,0)$
Slope = 3

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3 years ago