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4 years ago

5

Looking at the equation, 5x + 6 = 46, will x = 7 make the equation true? Why or why not?

2 answers:

Andreas93 [3]4 years ago

8 0

No because 5x7=35 and then when you add 6 it equals 41

nydimaria [60]4 years ago

4 0

Answer:

This is not true so x=7 is not a solution

Step-by-step explanation:

5x + 6 = 46

Let x = 7

5*7 +6 = 46

35+6 = 46

41 = 46

This is not true so x=7 is not a solution

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24 by 72 by 18 in cubic feet

Vadim26 [7]

I have to assume that the 24, the 72, and the 18 are feet.

If those are the dimensions of a rectangular prism, like a box, a crate,
or a humongous block of ice, then

Volume = (length) x (width) x (height) =

       (24-ft) x (72-ft) x (18-ft) = <em>31,104 cubic ft</em>

If those numbers are <u>inches</u>, then here's the easy way to handle it:

   24 inches = 2 ft
   72 inches = 6 ft
   18 inches = 1.5 ft

   Volume = (length) x (width) x (height) =

   (2ft) x (6ft) x (1.5ft) = <em>18 cubic feet

</em>

7 0

3 years ago

Solve for x. 2x + 16 = 3(x - 9) A) -43 B) -25 C) 0 D) 43

sergiy2304 [10]

Answer:

x = 43

Step-by-step explanation:

2x + 16 = 3(x - 9)

2x + 16 = 3x - 27

2x - 16 = 3x -27 (-16)

2x = 3x -43

2x (-3x) = -43

-1x or -x

-x = -43

-43/ -x = 43

4 0

3 years ago

WILL MARK BRAINLEST AND THANKS Area: 28.67 sq m and the side is 4.7 m The missing side length is equal to:??? m

ladessa [460]

Answer:

The area of this is 28.67 meters squared

Step-by-step explanation:

You must use division in order to complete the question

7 0

3 years ago

Read 2 more answers

The Area. is __ square units.

artcher [175]

Answer:

The area is 36 square units.

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

You stand a known distance from the base of the tree, measure the angle of elevation the top of the tree to be 15â—¦ , and then

gogolik [260]

Answer:

The maximum possible error of in measurement of the angle is $d\theta_1 =(14.36p)^o$

Step-by-step explanation:

From the question we are told that

The angle of elevation is $\theta_1 = 15 ^o = \frac{\pi}{12}$

The height of the tree is h

The distance from the base is D

h is mathematically represented as

$h = D tan \theta$ Note : this evaluated using SOHCAHTOA i,e

$tan\theta = \frac{h}{D}$

Generally for small angles the series approximation of $tan \theta \ is$

$tan \theta = \theta + \frac{\theta ^3 }{3}$

So given that $\theta = 15 \ which \ is \ small$

$h = D (\theta + \frac{\theta^3}{3} )$

$dh = D (1 + \theta^2) d\theta$

=> $\frac{dh}{h} = \frac{1 + \theta ^2}{\theta + \frac{\theta^3}{3} } d \theta$

Now from the question the relative error of height should be at most

$\pm p$ %

=> $\frac{dh}{h} = \pm p$

=> $\frac{1 + \theta ^2}{\theta + \frac{\theta^3}{3} } d \theta = \pm p$

=> $d\theta = \pm \frac{\theta + \frac{\theta^3}{3} }{1+ \theta ^2} * \ p$

So for $\theta_1$

$d\theta_1 = \pm \frac{\theta_1 + \frac{\theta^3_1 }{3} }{1+ \theta_1 ^2} * \ p$

substituting values

$d [\frac{\pi}{12} ] = \pm \frac{[\frac{\pi}{12} ] + \frac{[\frac{\pi}{12} ]^3 }{3} }{1+ [\frac{\pi}{12} ] ^2} * \ p$

=> $d\theta_1 = 0.25 p$

Converting to degree

$d\theta_1 = (0.25* 57.29) p$

$d\theta_1 =(14.36p)^o$

4 0

3 years ago