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lesantik [10]
2 years ago
8

Which of the following demonstrates the commutative property across multiplication for 2 × 10 × 7        A. 2 + 10 × 7   B. 2 ×

(10 × 7)   C. 10 ×7 × 2   D. (2 × 10) × 7
Mathematics
2 answers:
Yuliya22 [10]2 years ago
3 0

The correct answer is C. 10×7×2

jolli1 [7]2 years ago
3 0

Answer:

Option C is correct

10 \times 7 \times 2

Step-by-step explanation:

Commutative property of multiplication states that you can multiply number in any order.

For example:

2 \times 3  = 3 \times 2

3 \times 4 \times 5 = 4 \times 5 \times 2

Given that:

2 × 10 × 7

By definition Commutative property of multiplication,

⇒10 \times 7 \times 2

Therefore, 10 \times 7 \times 2 demonstrates the commutative property across multiplication for 2 × 10 × 7

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A study was conducted to determine the percent of children that want to grow up work in the same career as a parent. In a sample
Irina-Kira [14]

Answer:

Step-by-step explanation:

From the information given,

Number of sample, n = 200

Probability of success, p = 43/100 = 0.43

q = 1 - p = 1 - 0.43

q = 0.57

For a confidence level of 95%, the corresponding z value is 1.96.

The formula for determining the error bound for the proportion is

z × √pq/n

= 1.96 ×√(0.43 × 0.57)/200

= 1.96 × 0.035 = 0.0686

The upper boundary of the population proportion is

0.43 + 0.0686 = 0.5

The lower boundary of the population proportion is

0.43 - 0.0686 = 0.4

The error in the solution is

phat = 0.43/200 = 0.00215

Also,

[-0.0043, 0.0086] is wrong

5 0
2 years ago
a dealer bought some tires for 6500 the tires were sold for 9500 making $50 on each tire how many tires were involved
torisob [31]
130 tires were involved.
4 0
2 years ago
Read 2 more answers
Elliott has some yarn that she wants to use to make hats and scarves. Each hat uses 0.2 kilograms of yarn and
erastova [34]

Answer:

The equation are:

1) h + s = 20

2) 4h = 1s

Step-by-step explanation:

Number of hats Elliott made = h

Number of scarfs Elliott made = s

total number of items Elliott made = 20

h + s = 20 ..[1]

1 hat uses 0.2 kilograms of yarn

1 hat = 0.2 kg of yarn

Then h hats will use = 0.2h kg of yarn

1 scarf uses 0.1 kilograms of yarn

1 scarf= 0.1 kg of yarn

Then s scarfs will use = 0.1s kg of yarn

She wants to twice as much as yarn for scarves for hats:

2 × (0.2h kg of yarn) = 0.1s kg of yarn

0.4h = 0.1s

4h = 1s...[2]

The equation are:

1) h + s = 20

2) 4h = 1s

8 0
2 years ago
Read 2 more answers
What is the value of x in the equation 0.7x – 1.4 = –3.5?
deff fn [24]

0.7x-1.4 =-3.5

 add 1.4 to each side

0.7x = -2.1

 x = -2.1 / 0.7

x = -3

 Answer is B -3

3 0
2 years ago
Read 2 more answers
Raya buys a van for £8500 plus VAT at 20%
asambeis [7]

They buy the van for £8,500 + VAT 20%:

Total paid for the van = £8,500 x 1.20 = £10,200

They make 12 payments of £531.25 for a total of:

12 x £531.25 = £6,375

To find the amount of deposit, subtract the total payments from total cost:

£10,200 - £6,375 = £3,825

The ratio of deposit to the payments is: 3825 : 6375

Reduce the answer by dividing both numbers by 75:

3825/75 = 51

6375 / 75 = 85

The ratio becomes: 51/85

6 0
2 years ago
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