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quester [9]
3 years ago
6

Please help me, this is frustrating!

Mathematics
2 answers:
vodka [1.7K]3 years ago
8 0
A) mes ∠ DAB) = mes ARC DAB/2

if mes ARC DAB = 40° , then mes DAB = 20

b) ∠ BDA  is inscribed in half cercle, so its mesure is 90°

c) ∠DBA =90° - 20° = 70° (COMPLEMENTARY angles in a right triangle)

d) LENGTH OF ARC DB:

The central angle DCB = mes ARC DB = 40°;

 Arc LENGTH = (40°) * (2πR)/360°, with R = 12 and π ≈ 3.14

Arc Length = (40°)*2*3.14*12/360 = 8.37 CM
kolbaska11 [484]3 years ago
5 0
Check the picture below


for the DB length, make sure your calculator is in Degree mode, since the angles are in degrees.

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Some kids are selling lemonade for $1.50 per cup at a high
BaLLatris [955]

A function that would represent profit based on the number of cups of lemonade is Profit = 1.5n - 14

<u>Solution:</u>

Given, Some kids are selling lemonade for $1.50 per cup at a high school baseball game.  

They spent $14 on all of the items needed for the lemonade stand (cups, lemonade, table oth, sign, etc)

We have to create a function that would represent profit based on the number of cups of lemonade

Now, let the number of cups sold be "n"

Then , we know that,<em> profit = selling price – cost price  </em>

Profit = number of cups sold x price per cup – cost price

Profit = n x $ 1.5 – $ 14  

Profit = 1.5n – 14

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6 0
3 years ago
Find an odd number with 3 digits such that all the digits are different and add up to 15. The difference between the first two d
Serjik [45]

Answer:

The three digit number = 951

Step-by-step explanation:

Let suppose the numbers are:

= abc

According to given condition:

a+ b + c = 15  -------------eq1

Also, given the difference between the first two digit = the difference between the last two digits:  

==> l a-b l = l b-cl  

==> (a-b) = (b-c)  

==> (a+c) = 2b

Now we will substitue in eq1

==> a+ b + c = 15

==> 2b + b = 15

==> 3b = 15

Dividing both sides by 3 we get:

b =5

a + c = 2b

a+ c = 10

a = 10 -c ..........(2)

We know that"  

(a-b) = (b-c)

==> a > b+c

==> a > 5 + c

==> 10 -c > 5 +c  

==>5 > 2c

==> 2.5 > c

As c is an odd number so c will be equal to 1

c = 1

a = 10 -1

a = 9

The three digit number = 951

The hundred digit is greater than the sum of the tens and ones digits

i hope it will help you!

6 0
3 years ago
The elevation of Mt. Everest is 29,032 ft above sea level.
Nina [5.8K]
The key word is “above” so the answer is A! :) (could I please have brainliest?)
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I need to know the answer
guapka [62]
9! good luck skdjdjd
4 0
3 years ago
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The scatter plot below shows the relationship between the length (x) in meters and mass f(x) in kg of a marine animal
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F(x) = -9 + 10.3x probably.
It's definitely not the first or last option as they have negative gradients (i.e. negative x-coefficient) and so represent a negative correlation. The data given tells us there is a positive gradient and so a positive correlation.
It could be the second option as the second and third are not so vastly different but I would go for the third because it appears to most closely fit the data pattern.
6 0
3 years ago
Read 2 more answers
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