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Temka [501]
2 years ago
6

Francine applies the commutative property to the product. (−8/9)⋅(−13)⋅(18) Which expression illustrates the commutative propert

y applied to the product? (−8/9)⋅(18)⋅(−13) [(−8/9)⋅(−13)]⋅(18) (−8/9)⋅[(−13)⋅(18)] (−8/9)⋅(−13)⋅(18)
Mathematics
2 answers:
oksian1 [2.3K]2 years ago
4 0

The commutative property implies that, the order of multiplication is not important.

(-\frac 89) \cdot (18) \cdot (-13) is true

Commutative property of multiplication states that:

If a \times b  = b \times a

The expression is given as:

(-\frac 89)\cdot (-13) \cdot (18)

To get the commutative expression, we simply change the position of each factor in the expression.

So, some possible equivalent expressions are:

(18) \cdot (-13) \cdot (-\frac 89)

(18)\cdot (-\frac 89) \cdot (-13)

(-13) \cdot (18) \cdot (-\frac 89)

There are several other equivalent expressions.

From the list of options;

(-\frac 89) \cdot (18) \cdot (-13) is true

Read more about commutative property at:

brainly.com/question/7037119

Firlakuza [10]2 years ago
4 0

Answer:(−8/9)⋅(18)⋅(−13)

Step-by-step explanation: I took the test ;)

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The cheapest available ticket for Super Bowl Ll on the secondary market costs
drek231 [11]

Answer:

He must work 52 days to pay for a single ticket.

Step-by-step explanation:

This question can be solved using proportions.

Per hour:

Joel earns $7.25 per hour, 20% of which is deducted for taxes. So without taxes, in each hour, he earns 100%-20% of 80% of this, so 0.8*7.25 = $5.8.

Per day:

He works 9 a.m. to 5 p.m. each day, so 8 hours a day.

For each hour, he earns $5.8.

So in a day, he makes 8*5.8 = $46.4

How many days he must work:

The ticket costs $2400.

He makes $46.4 a day.

So, to buy a ticket, he needs to work:

2400/46.4 = 51.7 days

Rounding up

He must work 52 days to pay for a single ticket.

7 0
3 years ago
The standard IQ test has a mean of 97 and a standard deviation of 17. We want to be
densk [106]

Let's call our estimate x. It will be the average of n IQ scores. Our average won't usually exactly equal the mean 97.  But if we repeated averages over different sets of tests, the mean of our estimate the average would be the same as the mean of a single test,

μ = 97

Variances add, so the standard deviations add in quadrature, like the Pythagorean Theorem in n dimensions.  This means the standard deviation of the average x is

σ = 17/√n

We want to be 95% certain

97 - 5 ≤ x ≤ 97 + 5

By the 68-95-99.7 rule, 95% certain means within two standard deviations. That means we're 95% sure that

μ - 2σ ≤ x ≤ μ + 2σ

Comparing to what we want, that's means we have to solve

2σ = 5

2 (17/√n) = 5

√n = 2 (17/5)

n = (34/5)² = 46.24

We better round up.

Answer: We need a sample size of 47 to be 95% certain of being within 5 points of the mean

6 0
3 years ago
6.) (-2)4 + (-10) ÷ (-3 + -1 + -1)
Licemer1 [7]

Step-by-step explanation:

  1. (-2)4 = -8
  2. -8 +(-10)= -18
  3. -18 divide by -5= 18/5
7 0
3 years ago
Read 2 more answers
Write the equation of the line, in POINT-SLOPE FORM, through the points (-1, 5) and (6,2).
docker41 [41]

Answer:

Step-by-step explanation:

y-5/x+1 = -3/7

7(y-5)=-3(x+1)

7y-35=-3x-3

7y+3x-32=0

8 0
3 years ago
Ruby bought 46 yards of fabric to make
emmainna [20.7K]

Answer:

<u>The answer is 5 set of curtains and it remains 6 yards of fabric.</u>

Step-by-step explanation:

Let's calculate the number of sets of curtains that Ruby can make with the 46 yards of fabric.

Number of sets of curtains = 46/8

Number of sets of curtains = 5 and it remains 6 yards

<u>The answer is 5 set of curtains and it remains 6 yards of fabric.</u>

5 0
3 years ago
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