Is 9a2 + 36 the difference of two squares?a) No b) Yes

Mathematics

2 answers:

USPshnik [31]3 years ago

8 0

Answer:

Step-by-step explanation:

Maru [420]3 years ago

6 0

Answer:

a) No

Step-by-step explanation:

The difference of squares is an equation where ax^2-c, where c>0 and c need to be a perfect square and a needs to be a perfect square. Although a and c are perfect squares, c<0, so this is not a perfect square.

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Which correctly describes a cross section of the cube below? Check all that apply.

yarga [219]

A cross section parallel to the base is a square measuring 4 cm by 4 cm 

Step-by-step explanation:

Here we have to select the correct statement regarding a cross section of the cube :

A cross section parallel to the base is a square measuring 4 cm by 4 cm :

Since , every side of a cube is same . Any cross section of a cube must be parallel to a square base . Hence, correct statement .

A cross section parallel to the base is a rectangle measuring 4 cm by greater than 4 cm :

Since , every side of a cube is same . Any cross section of a cube must be parallel to a square base . Here, base is rectangle . We don't have a rectangle base in cube . Not correct statement.

A cross section perpendicular to the base through the midpoints of opposite sides is a rectangle measuring 2 cm by 4 cm:

Since , every side of a cube is same . Any cross section of a cube must be parallel to a square base . Here, base should be square not rectangle . So , Not correct statement.

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3 years ago

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salantis [7]

Answer:

D. 12

(Hope this helps! Btw, I am the first to answer.)

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3 years ago

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