3 years ago

Rectangle A has length 3 and width 5. Rectangle B has length 12 and

Mathematics

1 answer:

galina1969 [7]3 years ago

7 0

Answer:

Yes, the scale factor is 4.

Step-by-step explanation:

If you times the length, 3, and the width, 5, by 4, you'll get 12 as your length and 20 as your width.

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What are the restrictions for a? 2a^2+a-15/5a^2+16a+3

koban [17]

ANSWER

The restrictions are

$a\ne -3,a\ne -\frac{1}{5}$

EXPLANATION

We were given the rational function,

$\frac{2a^2+a-15}{5a^2+16a+3}$

The function is defined for all values of a, except

$5a^2+16a+3=0$

This has become a quadratic trinomial, so we need to split the middle term.

We do that by multiplying the coefficient of $x^2$ which is 5 by the constant term which is 3. This gives us 15.

The factors of 15 that adds up to 16 are 1 and 15.

We use these factors to split the middle term.

$5a^2+15a+a+3=0$

We now factor to get,

$5a(a+3)+1(a+3)=0$

We factor further to get,

$(a+3)(5a+1)=0$

This implies that,

$(a+3)=0,(5a+1)=0$

This gives

$a=-3,a=-\frac{1}{5}$

These are the restrictions.

8 0

3 years ago

What is the value of the expression 18-2x(4+3)

Yanka [14]

Answer:

12-8x

Step-by-step explanation:

18-2x(4+3) =

18 -8x -6 =

12 -8x

3 0

3 years ago

Bradley had 25 baseball cards in his collection. He receives x number of baseball cards for his birthday.

timofeeve [1]

Answer:

25+x=y

Step-by-step explanation:

First, we start as 25, the number of cards he has in his collection. Then we add x, the cards he receive. The sum is y.

6 0

3 years ago

Which statement is true?

Alexandra [31]

Since p^2=p*p,
(p*p)^5 = p*p * p*p * p*p * p*p * p*p = p^10

6 0

3 years ago

Read 2 more answers

Write an expression to show the costs of 2 sandwiches 2 sandwiches 2 drinks and a salad .how many terms does your expression hav

Nataly [62]

I would say two
Have a good day

7 0

3 years ago