4 years ago

If 3 notebooks cost $3.51, how much would 7 notebooks cost?

Mathematics

2 answers:

Ket [755]4 years ago

8 0

Well, you would first divide 3÷ 3.15 Do you know what that would give you?

pychu [463]4 years ago

7 0

First, divide $3.51 by 3

3.51/3 = 1.17

Now, multiply the product by 7 to get the answer.

7 x 1.17 = 8.19

You might be interested in

Complete the expressions that would make them a perfect square trinomial.

kirza4 [7]

Answer:

a) 16

b) 100

c) 64

d) $\frac{81}{4}$ [/tex]

Step-by-step explanation:

Perfect square trinomial:

A perfect square trinomial has the following format:

$(x \pm a)^2 = x^2 \pm 2ax + a^2$

x² – 8x

$x^2 - 8x = x^2 - 2ax$

So 2a = 8, a = 4. Then

$a^2 = 4^2 = 16$

The perfect square trinomial is $x^2 - 8x + 16$

b. x2 + 20x +

2a = 20, so a = 10

$a^2 = 10^2 = 100$

The perfect square trinomial is $x^2 + 20x + 100$

x² – 16x +

2a = -16, so a = -8.

$a^2 = (-8)^2 = 64$

The perfect square trinomial is $x^2 - 16x + 64$

d. x2 + 9x +

$2a = 9$ , so $a = \frac{9}{2}$

$a^2 = (\frac{9}{2})^2 = \frac{81}{4}$

The perfect square trinomial is $x^2 + 9x + \frac{81}{4}$ [/tex]

6 0

3 years ago

Collin is substituting t = 2 and t = 6 to determine if the two expressions are equivalent.

Serjik [45]

Answer:

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Practice with lines cut by transversal.<br> What is the value of x?

Ghella [55]

X should equal 70 I think.

8 0

3 years ago

Read 2 more answers

How do you change a fraction into a percent?

Romashka-Z-Leto [24]

Example:
5/20 x 100 you put whatever fraction your looking for into calculator and multiply by 100

7 0

3 years ago

CAN SOMEONE PLEASE HELP?? IF SO, PLEASE AND THANK YOU.

AnnZ [28]

Answer:

$\huge\boxed{d. \: 18a {b}^{3} \: and \: 16 {a}^{3} b}$

is the unlike pair terms.

6 0

3 years ago