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3 years ago

Why is there no commutative property for subtraction and division

1 answer:

5 0

There is no commutative property for subtraction and division because order does matter. 6 - 5 will not give you the same answer as 5 - 6.

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Please help!! ill give BRAINLIEST!!!

Alex787 [66]

1. Similar: all angles are equivalent.

2. Similar: 2 angles and 1 side are equivalent.

3. Not enough information.

4. Not enough information.

5. Not enough information.

6. False.

7. True.

8. True.

9. True.

10. False.

6 0

4 years ago

I WILL MARK BRAINLIEST

never [62]

Answer:

Step-by-step explanation:

The tuna can has a shape of a cylinder, and the area of the tuna lablel is the lateral surface area of the can

$A=2\pi rh$

Data

diameter d= 6.5cm

radius r = $\frac{diameter}{2}$ = $\frac{6.5}{2} = 3.25cm$

height h= 3cm

leteral surface area

$A=2*3.142*3.25*3\\= 61.269\\=61.27cm^2$

3 0

3 years ago

2.1x10 to the -3 power x 2x10 to the second power

ad-work [718]

Answer:

$4.2*10^{-1}$

Step-by-step explanation:

We want to simplify:

$2.1*10^{-3}\times 2*10^2$

We rewrite to get:

$2.1*2*10^2*10^{-3}\times10^2$

We now apply the laws of indices

$4.2*10^{-3+2}$

We simplify to get $4.2*10^{-1}$

We leave our final answer is scientific form.

The final answer is therefore:

$4.2*10^{-1}$

5 0

3 years ago

Please help me i will mark brainliest!!

andriy [413]

Answer:

9√3

Step-by-step explanation:

simpilify the expression by multiplying exponents

= 3 1/9

using a m/n = n√a^m, transform to 9√3

6 0

3 years ago

Read 2 more answers

The longer leg of a right triangle is 7 ft longer than the shorter leg. The hypotenuse is 9ft longer than the shorter leg. Find

julia-pushkina [17]

Answer:

8, 15 and 17 feet respectively

Step-by-step explanation:

Let the shorter leg=l feet

The longer leg of a right triangle is 7 ft longer than the shorter leg, therefore Length of the longer leg=(l+7) feet

The hypotenuse is 9ft longer than the shorter leg. Therefore Length of the hypotenuse=(l+9) feet

Using Pythagoras Theorem

$Hyp^2=Opp^2+Adj^2\\(l+9)^2=l^2+(l+7)^2\\(l+9)(l+9)=l^2+(l+7)(l+7)\\l^2+9l+9l+81=l^2+l^2+7l+7l+49\\l^2+18l+81=2l^2+14l+49$

This results into:

$2l^2-l^2+14l-18l-81+49=0$

$l^2-4l-32=0\\l^2-8l+4l-32=0\\l(l-8)+4(l-8)=0\\(l-8)(l+4)=0$

l-8=0 or l+4=0

l=8 or -4

Since length cannot be negative, The length l=8 feet

The sides of the rectangle are therefore: 8, 15 and 17 feet respectively

5 0

3 years ago