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mrs_skeptik [129]

3 years ago

15

Heres an easy one. “Determine whether the two expressions are equivalent. If so, tell me what property is applied. If not, expla

in why.”
18×1 and 18.

7+0 and 7.

1 answer:

Irina18 [472]3 years ago

5 0

Hjkelpykwoekfkjsjwjgfja

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15−7×2+23 help...................................

Helen [10]

Answer:

24

Step-by-step explanation:

PEMDAS: 15-14+23

1+23

24

8 0

3 years ago

Read 2 more answers

About how accurately must the tank's exterior diameter be measured to calculate the amount of paint it will take to paint the si

kondaur [170]

Answer: The error of the diameter would be 5% .

Step-by-step explanation:

Since we have given that

$S=2\pi rh$

Here, r is the radius

h is the height

So, it becomes,

$S=2\pi (\dfrac{D}{2})h\\\\S=\pi Dh\\\\S=\pi D\times 10\\\\S=10\pi D$

So, we will derivate S wrt D, we get that

$\dfrac{dS}{dD}=10\pi\\\\dS=10\pi dD$ ---------------------(1)

As we have given that

it will take to paint the side of the tank to within 5% of the true amount.

So, it becomes,

$dS=0.5\pi D$ ---------------(2)

So, from (1) and (2) , we get that

$0.5\pi D=10\pi dD\\\\\dfrac{0.5\pi}{10\pi}=\dfrac{dD}{D}\\\\0.05=\dfrac{dD}{D}=5\%$

Hence, the error of the diameter would be 5% .

5 0

4 years ago

Solve for h. <br> 7a = -9 + 2h

Rama09 [41]

Answer: h = 7a + 9 divided by 2

3 0

3 years ago

mylen [45]

Pi D = 100 pi = distance once around
1000 pi = distance ten times around
1000 pi meters/1000meters/km = pi km
= 3.14 = 3.1 km

6 0

3 years ago

Identify the range of the function shown in the graph.

MAVERICK [17]

$\mathfrak{\huge{\orange{\underline{\underline{AnSwEr:-}}}}}$

Actually Welcome to the Concept of the plots and graphs.

Since, the x axis varies from -infinite to +infinite,

here, the y totally varies from -5 to +5,

hence, the option B.) is correct.

===>

$- 5 \leqslant y \leqslant 5$

3 0

3 years ago