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3 years ago

Is 38 square root irrational or rational?

Mathematics

1 answer:

Andru [333]3 years ago

8 0

Answer: Irrational

Step-by-step explanation:

The only rational square roots are those that are perfect squares and 38 isn't a perfect square.

Examples of perfect squares: 4, 9, 16, 25, 36, 49, etc.

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Solve the formula <br> x − y = −8 for y.

laiz [17]

Answer:

$y = x + 8$

Step-by-step explanation:

$x - y = - 8$

$x + 8 = y$

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3 years ago

Jay wants to make a box, with no lid (or top), out of a 10" x 6" rectangular piece of cardboard. If Jay cuts squares with dimens

LiRa [457]

Answer:

a. $V(x)=x(10-2x)(6-2x)$

b. $S(x)=4(15-x^2)$

Step-by-step explanation:

Dimensions of rectangular piece of cardboard= $10\times 6$

According to question

Length of box,l=10-2x

Breadth of box,b=6-2x

Height of box,h=x

Volume of box= $l\times b\times h$

Substitute the values in the formula

Volume of box= $x(10-2x)(6-2x)$

$V(x)=x(10-2x)(6-2x)$

b.Surface area of box= $2(b+l)h+lb$

Because the box has no lid

Substitute the values in the formula

Surface area of box= $2(10-2x+6-2x)x+(10-2x)(6-2x)$

Surface area of box= $2(16-4x)x+60-20x-12x+4x^2$

Surface area of box= $32x-8x^2+60-32x+4x^2$

Surface area of box= $60-4x^2=4(15-x^2)$

Surface area of box, S(x)= $4(15-x^2)$

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3 years ago

Xavier is a new student, explain to him what a variable is. Use complete sentences.

Anit [1.1K]

Answer:a symbol, usually a letter, used to represent a number.

Step-by-step explanation:

a math process (like adding, subtracting, multiplying, or dividing)

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