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just olya [345]
3 years ago
14

Leon's mother paid $2.16 for 3 pounds of sugar. How much would 1 pound of sugar cost?

Mathematics
1 answer:
arlik [135]3 years ago
8 0

Answer:

.72

Step-by-step explanation:

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Which number produces an irrational number when multiplied by 1/3
MArishka [77]

We can simply observe that.

  1. 0.777... is rational, because it is a number with infinite but repeating decimal part.
  2. 1/3 is rational, because it's the division between two integers
  3. -\sqrt{16}=-4, so this is rational as well.

Since the product of two rational numbers is always rational, we have that

0.\bar{7}\cdot \dfrac{1}{3},\quad \dfrac{1}{3}\cdot \dfrac{1}{3},\quad -4\cdot \dfrac{1}{3}

are all rationals, since they are the product of two rationals.

On the other hand, we have

\sqrt{27}=\sqrt{9\cdot 3}=3\sqrt{3}

and thus

3\sqrt{3}\cdot \dfrac{1}{3}=\sqrt{3}

which is irrational.

3 0
3 years ago
Andrew is showing his work in simplifying −4.5 + 4.2 + 5.6 − 7.3. Identify any errors in his work or in his reasoning.
julia-pushkina [17]

Answer:

  • D. Step 5

Step-by-step explanation:

Andrew made a mistake at last step.

<u>It should be:</u>

  • -11.8 + 9.8 = 9.8 - 11.8 = -2 but not -21.6
6 0
3 years ago
What are the solutions to the system of equations? y=−x^2−5x−6 x+y=−3
Dmitriy789 [7]

Answer:

The solutions are the points (-3,0) and (-1,-2)

Step-by-step explanation:

we have

y=-x^{2} -5x-6 -----> equation A

x+y=-3 -----> equation B

Solve the system of equations by graphing

The solution of the system of equations are the intersection points both graphs

The solutions are the points (-3,0) and (-1,-2)

see the attached figure

5 0
3 years ago
A store is having a sale when everything is 20% off. Before the sale, the store had 100 pairs of flipflops in stock. After selli
Jobisdone [24]

Answer: do you still need help comment ok

Step-by-step explanation:

5 0
2 years ago
Samantha begins her road trip with 30 gallons of gasoline in the tank for a van or a van gets 25 miles to the gallon Y represent
tekilochka [14]

y = -1/25x + 30

The +30 represents the 30 gallons of gasoline at the beginning of Samantha's road trip.

As each mile, x, does by, 1/25 of a gallon is lost (because the van gets 25 miles per gallon). so you put a  negative  1/25 in front of the x.  Therefore, when Samantha has driven x miles, she will have y gallons of gas left.

5 0
3 years ago
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