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saveliy_v [14]
4 years ago
5

Which property of addition is used in the following (7+9)+5=7+(9+5)​

Mathematics
1 answer:
grandymaker [24]4 years ago
8 0

Answer:

associative property of addition

Step-by-step explanation:

The 5 is substituted into the parentheses and the 7 is taken out.

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Solve ABC <br>c=10, B=35°, C=65%​
NISA [10]

Answer:

Part 1) The measure of angle A is A=80\°

Part 2) The length side of a is equal to a=10.9\ units

Part 3) The length side of b is equal to b=6.3\ units

Step-by-step explanation:

step 1

Find the measure of angle A

we know that

The sum of the internal angles of a triangle must be equal to 180 degrees

so

A+B+C=180\°

substitute the given values

A+35\°+65\°=180\°

A+100\°=180\°

A=180\°-100\°=80\°

step 2

Find the length of side a

Applying the law of sines

\frac{a}{sin(A)}=\frac{c}{sin(C)}

substitute the given values

\frac{a}{sin(80\°)}=\frac{10}{sin(65\°)}

a=\frac{10}{sin(65\°)}(sin(80\°))

a=10.9\ units

step 3

Find the length of side b

Applying the law of sines

\frac{b}{sin(B)}=\frac{c}{sin(C)}

substitute the given values

\frac{b}{sin(35\°)}=\frac{10}{sin(65\°)}

b=\frac{10}{sin(65\°)}(sin(35\°))

b=6.3\ units

5 0
3 years ago
How do I factor this problem?
Leviafan [203]
Let's solve your equation step-by-step
6v^2+v=40
step 1: subtract 40 from both sides
6v^2+v-40=0
6v^2+v-40=0
Step 2: factor left side of equation
(3v+8)(2v-5)=0
step 3: set factors eqyal to 0
3v+8=0 or 2v-5=0
Answer is v= -8/3 or v= 5/2
6 0
3 years ago
Help me if you don't know, don't touch it please
kobusy [5.1K]
To find the volume of a cone,
multiply 1/3 of it’s base times it’s height.
1/3 of 8 = 2.7
2.7 x 8 = 21.6 cubic yards
8 0
3 years ago
I’m having trouble with these types of questions.
german

The sum of all the angles in a triangle should always add up to 360° and seeing that this is an isosceles triangle 2 of the angles should be equal.

So there would be 2 30° angles and 360-60=300 so the 3rd angle would be equal to 300° . Hope this helps!

5 0
3 years ago
What is the additive inverse of the complex number 9-412<br> -9-41<br> -9 +41<br> 9 - 41<br> 9 + 41
Studentka2010 [4]

Additive inverse means the sum should be 0

so all you gotta do is multiply the complex number by -1

(the question isn't clear so I can't state the option)

5 0
4 years ago
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