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Zina [86]
4 years ago
12

salina and nessa combined like terms using the same expression salinas answer differs from nessas the table shows both of their

solutions

Mathematics
2 answers:
igor_vitrenko [27]4 years ago
7 0

Answer: A

Step-by-step explanation:

lisov135 [29]4 years ago
6 0

Answer:

A

Step-by-step explanation:

Consider the expression

6x^2y-3+x^2y+2xy^2+2xy-6

which both girls are given.

In this expression there are like terms:

  • 6x^2y and x^2y;
  • -3 and -6.

Combine the like terms:

6x^2y+x^2y=7x^2y;

-3+(-6)=-9

So,

6x^2y-3+x^2y+2xy^2+2xy-6=7x^2y +2xy^2+2xy-9

Correct option is A, Salina combined the x^2y terms correctly, but then left +x^2y term in her answer.

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PLEASE HELP! WILL GIVE 70 POINTS!!
Tresset [83]

Answer:

A=189\ mm^2

Step-by-step explanation:

<u>Surface Areas </u>

Is the sum of all the lateral areas of a given solid. We need to compute the total surface area of the given prism. It has 5 sides, two of them are equal (top and bottom areas) and the rest are rectangles.

Computing the top and bottom areas. They form a right triangle whose legs are 4.5 mm and 6 mm. The area of both triangles is

\displaystyle A_t=2*\frac{b.h}{2}=b.h=(4.5)(6)=27 mm^2

The front area is a rectangle of dimensions 7.7 mm and 9 mm, thus

A_f=b.h=(7.5)(9)=67.5 \ mm^2

The back left area is another rectangle of 4.5 mm by 9 mm

A_l=b.h=(4.5)(9)=40.5  \ mm^2

Finally, the back right area is a rectangle of 6 mm by 9 mm

A_r=b.h=(6)(9)=54 \ mm^2

Thus, the total surface area of the prism is

A=A_t+A_f+A_l+A_r=27+67.5+40.5+54=189\ mm^2

\boxed{A=189\ mm^2}

4 0
3 years ago
Robin is 9 years younger than Geraldo. Geraldo is twice as old as Robin. How old is Robin?
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Answer:

18

Step-by-step explanation:

9*2= 18

18-9=9

because it said twice as old as Robin you multiply

Hope this helped you

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

We know that

tan(195\°)=tan(15\°), because 195\° - 180\° = 15\°.

Now, angle 15° or 195° is not an important angle which can be solve by a given table like 30°, 45° or 60°. This means we have to use the calculator to find the more exact value, which is

tan(195\°)=tan(15\°)=0.267949192431123...

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