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Gnom [1K]
3 years ago
14

Which property allows you to write the expression (3 +71) + (8 - 61) as (8 - 61) + (3 + 71)?

Mathematics
1 answer:
Masteriza [31]3 years ago
8 0

Answer:

Commutative Property

Step-by-step explanation:

Commutative property is the property where if you change the order of the operands, it does not change the result.

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What is the total surface area of this square pyramid?
slamgirl [31]

Answer:

The total surface area of this square pyramid is 297\ mm^{2}

Step-by-step explanation:

we know that

The surface area of a square pyramid is equal to

SA=b^{2} +4[\frac{1}{2}(b)(h)]

we have

b=9\ mm ----> the length side of the square base

h=12\ mm ----> the height of the triangular faces

substitute the values

SA=9^{2} +4[\frac{1}{2}(9)(12)]=297\ mm^{2}

4 0
3 years ago
Evaluate 4(a^2 + 2b) - 2b when a = 2 and b = –2.
Rama09 [41]

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4

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3 years ago
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Lera25 [3.4K]

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Horizontal lines are parallel to the x-axis

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3 years ago
Q and R are independent events. If P(Q)= 1/8 and P(R)=2/5 find P(Q and R).
Dafna11 [192]
Answer: 1/20
To find P(Q and R), you have to multiply P(Q) by P(R) to get the probability that both events will occur. P(Q) = 1/8, and P(R) = 2/5, so when multiplied together, you get 2/40. This simplifies to 1/20, meaning P(Q and R) = 1/20.
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3 years ago
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