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3 years ago

Help me please i will give brainliest

Mathematics

1 answer:

AlekseyPX3 years ago

8 0

Answer:

Step-by-step explanation:

Number 13:

a+b=3+4

= 7

Number 14:

c-a= 12-3

= 9

Number 15:

a+b+c= 3+4+12

= 19

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Plz help ill give u brainlist

g100num [7]

Step One
Find the base area of the large hexagon as though the smaller one was not removed.

Area = 3*Sqrt(3) * a^2 /2 where a is the length of one side of the hexagon
a = 5
Area = 3*sqrt(3) * 25/2 = 75 sqrt(3) / 2 of the large hexagon without the smaller one removed.

Step Two
Find the area of the smaller hexagon. In this case a = 4
Area2 = 3*sqrt(3)*16/2 = 3*sqrt(3)*8 = 24 sqrt(3)

Step Three
Find the area of the thick hexagonal area left by the removal of the small hexagon.

Area of the remaining piece = area of large hexagon - area of the small hexagon

Area of the remaining piece = 75 *sqrt(3)/2 - 24*sqrt(3)

Step Four
Find the volume of the results of the area from step 3
Volume = Area * h
h = 18
Volume = (75 * sqrt(3)/2 - 24*sqrt(3))* 18

I'm going to leave you with the job of changing all of this to a decimal answer. I get about 420 cm^3

3 0

3 years ago

The table gives an inequality and a number to multiply both sides of the inequality by. Identify the new, true inequality.

zepelin [54]

Multiplying both sides of an inequality by a negative number reverses the inequality symbol.

<h3>How to determine the true inequalities?</h3>

The table of values is given as:

A: (-16 > -4) (-16 < -4) (-16 = -4)

B: (40 > 8) (40 < 8) (40 = 8

C: (-45 > 15) (-45 < 15) (-45 =15)

D: (35 > -20) (35 < -20) (35 = -20)

In the above list of inequalities, the true inequalities are

-16 < -4 --- because -16 is less than -4

40 > 8 --- because 40 is greater than 8

-45 < 15 --- because -45 is less than 15

35 > -20 --- because 35 is greater than -20

Lastly, when an inequality is multiplied or divided by a negative number, the inequality sign changes

Read more about inequality at:

brainly.com/question/17675534

#SPJ1

4 0

2 years ago

$2000 was borrowed for 4 years with an interest rate of 3% compounded annually. What is the total amount owed at the end of the

kompoz [17]

Answer:

$\$2,251.02$

Step-by-step explanation:

we know that

The compound interest formula is equal to

$A=P(1+\frac{r}{n})^{nt}$

where

A is the total amount owed

P is the amount of money borrowed

r is the rate of interest in decimal

t is Number of Time Periods

n is the number of times interest is compounded per year

in this problem we have

$t=4\ years\\ P=\$2,000\\ r=3\%=3/100=0.03\\n=1$

substitute in the formula above

$A=2,000*(1+\frac{0.03}{1})^{1*4}$

$A=2,000*(1.03)^{4}$

$A=\$2,251.02$

4 0

3 years ago

Read 2 more answers

Which is perpendicular to the line y=-3x-8y

atroni [7]

Answer:

I believe the answer is y = -7/3x

Step-by-step explanation:

When you rearrange the equation, y = -3x - 8y, you will get -7y = -3x.

We want the equation to be equal to y by itself. So we divide -7 from both sides, giving us the equation y = 3/7x.

The graph that is perpendicular to y = 3/7x is it's reciprocal: y = -7/3x

4 0

3 years ago

Read 2 more answers

A medical study investigated the effect of calcium and vitamin supplements on the risk of older Americans for broken bones. A to

Korolek [52]

Answer:

Fraction of older Americans who were included in the study and suffered broken bones during the three-year period = (37/389) = 0.0951

Step-by-step explanation:

The fraction of older Americans who were included in the study and suffered broken bones during the three-year period?

This fraction = (Number of older Americans who suffered broken bones recorded during the three year period of the study)/(Total number of older Americans involved in the study)

Number of older Americans who suffered broken bones recorded during the three year period of the study = (11 from those that took the additional supplements) + (26 from those that did not take additional supplements) = 11 + 26 = 37

Total number of older Americans involved in the study = 389

Fraction of older Americans who were included in the study and suffered broken bones during the three-year period = (37/389) = 0.0951

7 0

3 years ago