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Ahat [919]
2 years ago
12

The numbers Of students in the four sixth-grade classes at Northside School are 26,19,,34,and 21.Use the properties to find the

total number of Students in the four classes.
PLEASE HELP ME WITH THIS I DONT UNDERSTAND THIS PLAESE HELP ME :(
Mathematics
1 answer:
Dafna11 [192]2 years ago
7 0
Basically there are 3 addition properties and they are associative property, identity property, and commutative property.

Commutative property is just changing the order of the addends. Example: 26+19+34+21= 21+34+19+26

Identity Property is just adding a 0 to the number that doesnt change anything. Example: 26+19+34+21 +0 = 100

Associative property is just changing the grouping of the addends. Example: (26+19) + (34+21)

I know these properties may be complicated i know inhate them too haha but i hope i helped :) if you want you can search up the distributive property too but its with multiplication and addition combined and its harder but i think these are the 3 main properties.
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72 and 108

Step-by-step explanation:

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Trigonometry
Alchen [17]

The area of the triangle PQR is 17.6 square units.

Explanation:

Given that the sides of the triangle are PQ = 12 and PR = 3 and m\angle P = 78^{\circ}

We need to determine the area of the triangle PQR

<u>Area of the triangle:</u>

The area of the triangle can be determined using the formula,

\text {Area}=\frac{1}{2} qr \sin P

Substituting the values, we get,

\text {Area}=\frac{1}{2}(12)(3) \sin 78

Simplifying, we have,

\text {Area}=\frac{1}{2}(36)(0.98)

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The first side of a triangle is 7cm less than twice the second side. The third side is 4cm longer than the first side. The perim
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Given:

First side(A): 2B - 7

Second side(B): B

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If you look at the coefficients only, you can rewrite the equation like this:

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This means that 4B - 7 + 4 = 80

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Checking your work:

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34.5 + 20.75 + 24.75 = 80cm.

Hope this helped.

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2 years ago
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