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Gwar [14]
3 years ago
9

a 1 Mrs. Erskine spent $40.50 for a pair of shoes, $56.95 for jeans, and $25.75 for a shirt. Which of the following shows two eq

uivalent expressions, using the associative property of addition, that can be used to find the amount Mrs. Erskine spent? A (40.50 + 56.95) + 25.75; 25.75 + (40.50 + 56.95) B 40.50 +(56.95 + 25.75); (40.50+ 56.95) + 25.75 C 40.50 + (56.95 + 25.75); (40.50. 56.95) + (40.50 .25.75) D (40.50 +56.95) + 25.75; (40.50 + 56.95 +25.75) • 1 o​
Mathematics
1 answer:
aivan3 [116]3 years ago
6 0

Answer:

A

Step-by-step explanation:

<h3><u>Commutative Property</u></h3>
  • (a + b) + c = c + (a + b)

<u>(40.50 + 56.95) + 25.75</u> ; <u>25.75 + (40.50 + 56.95)</u> correctly represent the situation using the commutative property.

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Answer:

2d+3 dollars

Step-by-step explanation:

the second one 2d+3

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3 years ago
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To solve: x + 8 = 40
Scorpion4ik [409]

Well, to solve, you would subtract 8 from both sides, which means x would end up equaling 32.

X=32

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The mean of three numbers is 12 . Two of three numbers are 9 and 14 . What is the third numbers ?
Olenka [21]
13 is the correct answer
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3 years ago
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A pyramid has a square base with sides of length s. The height of the pyramid is equal to - of the length of a side on the base.
Vera_Pavlovna [14]
<h3><u>Question:</u></h3>

A pyramid has a square base with sides of length s. The height of the pyramid is equal to 1/2 of the length of a side on the base. Which formula represents the volume of the pyramid?

<h3><u>Answer:</u></h3>

<em><u>The formula represents the volume of the pyramid is:</u></em>

V=\frac{1}{6}s^3

<h3><u>Solution:</u></h3>

<em><u>The volume of square pyramid is given by formula:</u></em>

V = \frac{1}{3} a^2h

Where, "h" is the height of pyramid

"a" is the length of side of base

Here given that, pyramid has a square base with sides of length s

Therefore,

a = s

The height of the pyramid is equal to 1/2 of the length of a side on the base

h = \frac{1}{2} \times s\\\\h = \frac{s}{2}

<em><u>Thus the volume of pyramid becomes:</u></em>

V = \frac{1}{3} \times s^2 \times \frac{s}{2}\\\\V = \frac{s^3}{6}

\boxed{V=\frac{1}{6}s^3}

Thus the  formula  represents the volume of the pyramid is \frac{s^3}{6}

5 0
4 years ago
A clothing store has a section of jeans on sale. There is a 30% chance of picking a pair with a 30-inch inseam; a 25% chance of
Andrej [43]

The expected value of the inseam length of the jeans is found as

30% of 30+ 25% of 32+ 10% of 34+ 10% of 36 + 10% of 38 + 15% of 40

= \frac{30}{100}\times30 +\frac{25}{100}\times32+ \frac{10}{100}\times34+ \frac{10}{100}\times36 +\frac{10}{100}\times38+ \frac{15}{100}\times40

= 9+8+3.4+3.6+3.8+6=33.8

Hence, the third option 33.8 is the correct expected value.

3 0
3 years ago
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