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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.

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Is the following relation a function? 1) Yes 2) No

liberstina [14]

Answer: No it is not a function

The reason why is because x = 0 goes to multiple y outputs (y = 1 and y = 3 at the same time).

A function can only have one output for any given input.

Side note: Domain = {-2, 0, 5, 7} is the list of x values. Range = {1,3,5,8} is the list of y values.

5 0

3 years ago

Read 2 more answers

Help me with this math question

nasty-shy [4]

Answer:

$\huge \boxed{K=20}\checkmark$

B. 20

Step-by-step explanation:

First, you divide by 5 from both sides of equation.

$\displaystyle \frac{5k}{5}=\frac{100}{5}$

Simplify, to find the answer.

$\displaystyle 100\div5=20$

$\huge \boxed{K=20}$ , which is our answer.

6 0

3 years ago

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How do I solve this

ra1l [238]

-2+(-5)=-7 and 6+(-3)=3

5 0

3 years ago

A bank advertises that it compounds money quarterly and that it will take Double your money in 10 years. what is the interest-ra

S_A_V [24]

The interest rate is 6.992%, if a bank advertises that it compounds money quarterly and that it will take Double your money in 10 years.

Step-by-step explanation:

The given is,

Compounds money quarterly

Double your money in 10 years

Step:1

Formula to calculate future investment with compounded quarterly,

$A =P(1+\frac{r}{n} )^{nt}$ ...............................(1)

Where, A - Future amount

P - Initial investment\

r - Rate of interest

n - No. of compounding in a year

t - No. of years

Step:2

Let, P = X

A = 2X ( Double your money )

From given, n - 4 ( for compounding quarterly )

t - 10 years

From equation (1)

$2X =X(1+\frac{r}{4} )^{(4)(10)}$

$\frac{2X}{X} =(1+\frac{r}{4} )^{(4)(10)}$

$2 =(1+\frac{r}{4} )^{40}$

Take root $40^{th}$ root on both side,

$\sqrt[40]{2} = (1+\frac{r}{4} )$

$1.017479692 = (\frac{4+r}{4} )$

$(1.017479692)(4) = (r+4)$

$4.06992=(r+4)$

$r = 4.06992 -4$

$r =( 0.06992)(100)$

r = 6.992 %

Result:

The interest rate is 6.992%, if a bank advertises that it compounds money quarterly and that it will take Double your money in 10 years.

3 0

3 years ago

Rewrite the equation to isolate the variable.. df= g- 10 for d

ehidna [41]

Df = g - 10

To solve for d, divide both sides by f.

df / f = (g - 10) / f

d = (g - 10) / f

I hope this explains it.

6 0

4 years ago