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guapka [62]
3 years ago
5

The sum of (a + b) + c is equal to the sum of a + ( b + c) as explained by the ————.

Mathematics
2 answers:
nataly862011 [7]3 years ago
6 0
Associative property. associativity is a valid rule of replacement for expressions in logical proofs
natima [27]3 years ago
3 0

Answer:

It is distributive property

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Number 76 nunber 77 number 78and 79 please
vredina [299]

76) 10n^8

77) 35v^11

78) 2025/n^2

79) 4k^8

5 0
3 years ago
Find the sample size required to achieve the given margin of error with SD = 51.02 and z - score = 1.96. Round your answer to th
coldgirl [10]

Answer:

The sample size required is 2500.

Step-by-step explanation:

z-score:

In function of the margin of error M, the z-score is given by:

Z = \frac{M}{\frac{\sigma}{\sqrt{n}}} = \frac{M\sqrt{n}}{\sigma}

In this question, we have that:

\sigma = 51.02, M = 2, Z = 1.96

So

Z = \frac{M\sqrt{n}}{\sigma}

1.96 = \frac{2\sqrt{n}}{51.02}

2\sqrt{n} = 51.02*1.96

\sqrt{n} = \frac{51.02*1.96}{2}

(\sqrt{n})^2 = (\frac{51.02*1.96}{2})^2

n = 2500

The sample size required is 2500.

3 0
3 years ago
1) Jose saves $9/ week.He wants to buy a backpack that cost $45. If he save his money for 7 weeks, Would he be able to afford th
Alja [10]
1. Yes he would be able to but the back pack and he would actually have 18 to spare. Explanation- he saves $9 a week so if he saves for 7 weeks then he will have $63 but since he only needed 45 he will have 18 to spare
2. Since they have 65.50 but need to have 180 then u could just subtract 180 from 65.50 so they would 114.5 more dollars
3. Since lee scored 4 FEWER this tells us that micheal has more points so you would just add 4 to micheals total of points which would give you that micheal had 22 points
3 0
2 years ago
Read 2 more answers
What is the length of the diagonal of rectangle abcd ?
NISA [10]
Answer b 26 because a squared plus b squared = c squared so 10x10 + 24x24 = 676 and so you take the square root of 676 which is 26.
4 0
3 years ago
Write the point-slope form of the equation of the line through the given point with the given slope. (-5,0) slope= 2/3
amid [387]

Answer:

Step-by-step explanation:

y - 0 = 2/3(x + 5)

y = 2/3x + 10/3

8 0
3 years ago
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