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Elza [17]
3 years ago
5

Marlena spends a total of $58 at the Barnes and Noble. She purchases 4 books of equal price and spends an additional $4 on sales

tax. Write an equation to find, b, the cost of each book.
Mathematics
2 answers:
Natalka [10]3 years ago
8 0

Answer:

4b + 4 = 58

Step-by-step explanation:

Varvara68 [4.7K]3 years ago
7 0

Answer:

13.50$

Step-by-step explanation:

If the total tax is 4$ and then you purchased 4 books then it is 13.50$

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After John worked at a job for 10 years, his salary doubled. If he started at $x, hls salary after 10 years is​
Sholpan [36]

Answer:

$2x

Step-by-step explanation:

  1. x × 2 = 2x

I hope this helps!

4 0
3 years ago
A cube-shaped box has a volume of 1/8 of a cubic meter. What is the perimeter of each of its
belka [17]

Given:

The volume of a cube-shaped box is \dfrac{1}{8} cubic meter.

To find:

The perimeter of each of its faces.

Solution:

Let "a" be the side length of the cube shaped box. Then the volume of the box is:

V=(side)^3

V=a^3

It is given that the volume of a cube-shaped box is \dfrac{1}{8}  cubic meter.

a^3=\dfrac{1}{8}

Taking cube root on both sides, we get

a=\dfrac{1}{2}

Now, the perimeter of each face of a cube is:

P=4a

Where, a is the side length of the cube.

Putting a=\dfrac{1}{2}, we get

P=4\times \dfrac{1}{2}

P=2

Therefore, the perimeter of each face of a cube-shaped box is 2 meters.

5 0
3 years ago
Rock can read 10 books in 30 minutes.how long does it take rock to read 15 books,if the speed is consistant.
vazorg [7]
10book=30mins
divide 10
1book=3mins

time=(time to read 1 book) times (number of books)
time to read 1 book=3 mins
15 books
15 books=15 times 3mins
15books=45mins

45 mins
7 0
3 years ago
Read 2 more answers
Write the expressions in standard form. SHOW ALL STEPS! The sum of 9t – 13 and the opposite of 9t.
PSYCHO15rus [73]

Answer:

-13

Step-by-step explanation:

Opposite of 9t = -9t

Taking the sum of 9t - 13 and -9t

Sum = 9t - 13 + (-9t)

Sum = 9t - 13 - 9t

Sum = 9t-9t - 13

Sum  = -13

Hence the expression in standard form is -13

7 0
3 years ago
What is the solution of the quadratic equation?
NISA [10]
The answer is A. After you square root both sides, you have to add 3 to both sides and then divide both sides by 4.
5 0
3 years ago
Read 2 more answers
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