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Nonamiya [84]
3 years ago
5

I need help with 47 and 48 please please!

Mathematics
1 answer:
sergey [27]3 years ago
7 0
48. B and 47 is out of c and b
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19=8-7x-3 PLEASE HELP HELP NEEDED PLEASE
VashaNatasha [74]
8 - 7x - 3 = 19

5 - 7x = 19    |subtract 5 from both sides

-7x = 14    |divide both sides by (-7)

x = -2
3 0
3 years ago
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Evaluate the expression.
Karo-lina-s [1.5K]

Answer:

5. 27

6. -12

7. -15

Step-by-step explanation:

add and subtract

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3 years ago
PLEASE SOLVE THIS!! <br> Here's the question!!!
geniusboy [140]
The volume is 1733.33 v = lwh /3
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8 0
3 years ago
What statement explain whether haruto is correct
EastWind [94]

Answer:

"Haruto is correct because the angle is coterminal with 3pi/4 and the reference angle is pi/4."

Step-by-step explanation:

Coterminal angle:

Coterminal Angles are angles who share the same initial side and terminal sides. Finding coterminal angles is as simple as adding or subtracting 360° or 2π to each angle, depending on whether the given angle is in degrees or radians.

Finding if 3pi/4 is coterminal with 19pi/4:

19pi/4

= 16pi/4  +  3pi/4

= 4pi  +  3pi/4

= 2(2pi)   +   3pi/4

= 2(360°) + 3pi/4

= 3pi/4

Hence they are coterminal.

Reference angle:

The smallest angle that the terminal side makes with x-axis.

3pi/4 falls in second quadrant.

In 2nd quadrant, reference angle is given as = pi - 3pi/4

reference angle = pi/4.

6 0
3 years ago
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Four congruent square pieces with lengths of sides of 6 cm were cut out of corners of a square piece of cardboard. Then this pie
Aneli [31]

The original dimensions of the cardboard is 21 cm × 21 cm, if a square pieces with lengths of sides of 6 cm were cut out of corners of a square piece of cardboard and the volume of the resulting box is 486 cubic centimeters.

Step-by-step explanation:

The given is,

                   Square pieces with lengths of sides of 6 cm were cut out of corners of a square piece of cardboard.

                  The volume of the resulting box is 486 cubic centimeters.

Step:1

                  The volume, is the given piece of cardboard was folded into an open box, we calculate side value of cardboard after cut into a square piece,

                  Formula for volume of cardboard is,

                               Volume, V = whl......................(1)

                  Where, w - width

                                h - Height

                                l - length

                  From given, V= 486 cubic centimeters

                                        h = 6 cm ( Ref attachment)

                                       w = l

                  Equation (1) becomes,

                                          486=6(l^{2} )

                                              l^{2} = 81

                 Take root on both sides

                                            l = 9 centimeters

Step:2

               Ref the attachment,

               Side value of piece of cardboard

                                                       = 6 + 9 + 6

                                                       = 21

               Side value of piece of cardboard = 21 centimeters          

               original sides of cardboard is 21 cm × 21 cm  

Result:

            The original dimensions of the cardboard is 21 cm × 21 cm, if a square pieces with lengths of sides of 6 cm were cut out of corners of a square piece of cardboard and the volume of the resulting box is 486 cubic centimeters.    

7 0
3 years ago
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