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3 years ago

Explain how knowing 1+7 helps you find the sum for 7+1

Mathematics

2 answers:

nasty-shy [4]3 years ago

7 0

Because it is just backwards 1+7=8 and 7+1=8 so that why

AlekseyPX3 years ago

6 0

Answer:

Using communicative property.

Step-by-step explanation:

We are given to find the sum for 7+1 using 1+7.

Here we will use communicative property of addition.

Property says: a + b = b + a

Result of a+b would be equivalent to b+a.

Now we apply this property into our question.

Using communicative property we can write 1+7 is equivalent to 7+1

So, If we know the result of 1+7 then find the sum 7+1.

Therefore, sum of 1 +7 = 8 = 7+1

Thus, Using communicative property.

You might be interested in

water freezes when the temperature is 0 degrees Celsius at what Fahrenheit temperature does water freeze

Oxana [17]

It is already given in the question that that freezing temperature of water is 0 degree Celsius. The freezing temperature of water in degree Fahrenheit is required to be found.
We know the relation between degree centigrade and degree Fahrenheit is"
Degree Fahrenheit = C(9/5) + 32
Here in the above equation "C" represents degree centigrade.
From the question we already know the freezing temperature of water as 0 degree Centigrade. Now we have to replace the value of Centigrade in the equation
Degree Fahrenheit = C(9/5) + 32
   = 0(9/5) + 32
   = 0 + 32
      = 32 degrees
So water freezes at 32 degrees Fahrenheit.

8 0

4 years ago

Using the fixed-time period inventory model, and given an average daily demand of 200 units, 4 days between inventory reviews, 5

KATRIN_1 [288]

Answer:

Correct option: B. About 1,686.

Step-by-step explanation:

The formula to compute the order quantity (Q) is:

$Q=(q_{d}\times (I+L))+(z\times\sigma_{I+L})-I_{n}$

Here

$q_{d}=average\ daily\ semand=200\\I = Inventory\ review\ time=4\\L=lead\ time=5\\\sigma_{I+L}=standard\ deviation\ over\ the\ review\ and\ lead\ time=3\\I_{n}=number\ of\ units\ of\ inventory\ on\ hand=120$

Compute the order quantity as follows:

$Q=(q_{d}\times (I+L))+(z\times\sigma_{I+L})-I_{n}\\=(200\times(4+5))+(1.96\times 3)-120\\=1800+5.88-120\\=1685.88\\\approx1686$

Thus, the order quantity was about 1,686.

5 0

3 years ago

Can someone please help me with question 3

Anastasy [175]

Answer:

8.55 inches tall

Step-by-step explanation:

equation: h = -0.75t +12. The slope is -0.75 because that's the rate of the candle burning, and the y intercept is 12 because that's how tall it is initially.

Now plug in 4.6 for t you get:

h = -0.75t + 12

h = -0.75(4.6) + 12

h = -3.45 +12

h = 8.55 inches tall

4 0

4 years ago

What is ∑n=124(2n−3) equal to?

neonofarm [45]

Answer:

1332

Step-by-step explanation:

[n=1 to 24]∑(5n−7)

= 5*24*25/2 - 7*24

= 1332

3 0

3 years ago

Compute the standard deviation of the following set of data to the nearest whole number: 8, 12, 15, 17, 18

attashe74 [19]

We have that

set of data [8, 12, 15, 17, 18]

step 1
Find the mean
[8+ 12 + 15 + 17 + 18]/5-------> 70/5------> 14

step 2
for each number: subtract the Mean and square the result
(8-14)²----->36
(12-14)²----> 4
(15-14)²----> 1
(17-14)²----> 9
(18-14)²----> 16

step 3
 work out the mean of those squared differences
[36+4+1+9+16]/5-----> 66/5-----> 13.2----> this value is called the "Variance"

step 4
Take the square root of that
standard desviation=√13.2-----> 3.63-------> 4

the answer is
4

7 0

3 years ago