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3 years ago

La cantidad de horas h que debe dormir una persona joven de n años está dada por la siguiente expresión:

Mathematics

1 answer:

natulia [17]3 years ago

8 0

Answer:

Option D doesn't make any sense.

Step-by-step explanation:

D) 7 hours of sleep correspond to an age of 19 years.

That is wrong.

If we use the expression provided

hours = 8 + 0.5*(18 -age)

hours = 8 + 0.5*(18 -19)

hours = 8 + 0.5*(-1)

hours = 7.5

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(10x - 4)=20<br> Question: What value of x makes the equation true

liraira [26]

Answer:

x = 10.4

Step-by-step explanation:

1. Multiply each side by 5 to remove it as a fraction

2. it cancels out on the left leaving 10x - 4 = 100

3. Add 4 to each side canceling it out on the left and leaving 10x = 104

4. Divide each side by 10 to get x by itself

5. 10x/100 = 104/10

6. x = 10.4

4 0

3 years ago

A leap year happens every 4 years.There are 29 days in the month of February in a Leap year.A mathematician was born on 29th of

Veseljchak [2.6K]

79years

Step-by-step explanation:

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3 0

3 years ago

Help pleaseee! Thank you

bixtya [17]

Answer:

Step-by-step explanation:

width of a rectangle=11 cm=11*5=55 ft

length of rectangle =8 cm= 8*5=40

Area=55*40=2220 ft²

height=3 cm=3*5=15

base=11 cm=11*5=55

Area of a triangle=base*height/2=15*55/2= ft^2

2220+412.5=2632.5 ft^2

this number is close to 2615 if the square unit on the grid =1 cm

7 0

3 years ago

Kim has a a coin and a dice with 6 sides. She flips the coin once and rolls the dice once. What is the probability that the coin

TEA [102]

Answer:

Step-by-step explanation:

6+4=10

3 0

2 years ago

Read 2 more answers

What us the value of the discriminant of the quadratic equation -2^2=-8x+8 and what does its value mean about the number of a re

svlad2 [7]

ANSWER

The discriminant is zero.

The given equation has one real root.

EXPLANATION

The given quadratic equation is:

$- 2 {x}^{2} = - 8x + 8$

We rewrite this in the form;

$a {x}^{2} + bx + c = 0$

$- 2 {x}^{2} + 8x - 8 = 0$

This means that,

a=-2, b= 8, c=-8

The discriminant is given by;

D=b² - 4ac

That is:

$D = {8}^{2} - 4( - 2)( - 8)$

$D = 64 - 64 = 0$

Therefore the discriminant is zero.

This tells us that the quadratic equation has one real root.

In order words, the given quadratic equation has a repeated real root.

3 0

3 years ago