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3 years ago

Barbara buys

Mathematics

1 answer:

docker41 [41]3 years ago

6 0

Answer

yes it is correct

Step-by-step explanation:

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Maryna spent 1/5 of her money on a book. If she had $80.00 left after she bought the book, how much money did she have originall

AveGali [126]

Answer:

$100

Step-by-step explanation:

$80=4/5 of her original money

(5/4)*80=original amount

=100

3 0

3 years ago

All of the following represent the same ratio except _____. 1 to 5 5/1 5:1

natita [175]

Answer:

1 to 5

Step-by-step explanation:

Others are saying 5 to 1

7 0

3 years ago

Determine the value of the variable in the product of powers.

aleksandrvk [35]

Answer:

1. x = - 3

2. y = -9

3. n = 0

Explanation:

The expressions are garbled. The correct expressions to determine the product of powers are:

1. What is the value of x in the product of powers $5^5\cdot 5^x=5^2$ ?

2. What is the value of y in the product of $p^{-3}\cdot p^{-6}=p^y$ ?

3. What is the value of n in th product of $9^2\cdot 9^{-7}\cdot 9^n=9^{-5}$ ?

<h2>Solutions</h2>

1. What is the value of x in the product of powers $5^5\cdot 5^x=5^2$ ?

Apply the rule of the product of powers with the same base to the left side of the equality.

The product of two powers with the same base is the base raised to the sum of the exponent:

$5^5\cdot5^x=5^{(5+x)}$

Now the power on the left side has the same base as the power on the right side, so the exponents are the same:

5 + x = 2

x = 2 - 5

x = - 3

2. What is the value of y in the product of $p^{-3}\cdot p^{-6}=p^y$ ?

Again, the product of the two powers on the left side is equal to the common base raised to the sum of the exponents:

On the left side, you get:

$p^{-3}\cdot p^{-6}=p^{(-3-6)}=p^{-9}$

Then,

$p^{-9}=p^y\\\\-9=y\\\\y=-9$

3. What is the value of n in th product of $9^2\cdot 9^{-7}\cdot 9^n=9^{-5}$ ?

Same rule:

Left side:

$9^2\cdot 9^{-7}\cdot 9^n=9^{(2-7+n)}=9^{(-5+n)}$

Left side equal to right side:

$9^{(-5+n)}=9^{-5}\\\\-5+n=-5\\\\n=-5+5\\\\n=0$

8 0

3 years ago

Read 2 more answers

suppose that, and an equation with two variables, you know the value of one of the variables. Describe a method for finding the

statuscvo [17]

So if an equation with two variables, you need to also two equations to solve the values of the variables. but if you knew the value of the one variable then onl one equation is need. for example an equation x + y = 20
where x = 5
then to solve the value of y, substitute the value of the equation
5 + y = 20
then transpose 5 to the other side
y = 20 - 5
y = 15

7 0

4 years ago

What is the first quartile of the data set for this box plot? A. 12 B. 16 C. 19 D. 24 E. 32

Kryger [21]

where is the picture of the box and whisker plot I don't see nothin'

3 0

3 years ago