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Free_Kalibri [48]
2 years ago
7

Robby took his dog to the pet grooming store. The service costs $30. He tips the groomer 25%.

Mathematics
2 answers:
lozanna [386]2 years ago
7 0

Answer: $37.50

Step-by-step explanation:

You multiply the $30 by the percentage tip so 25% in this case, first make it a decimal that would be 0.25. 30*.25=7.50 then you add the 7.50 to the 30 which is gives you the $37.50

hoa [83]2 years ago
7 0

Answer:

$37.50

Step-by-step explanation:

25% of 30 is 7.50   $7.50+$30=$37.50

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Ms. Walker used a coordinate plane to plot her students' scores on a recent quiz. She let x represent the number of correct answ
Lelechka [254]

Answer:

Slope = 4

Step-by-step explanation:

The x-axis values to represent the number of correct answers.

The y-axis values to represent the number of points earned.

The points on the graph are: (17,68) , (20,80) and (24,96)

The slope(m) of the graph = change in y ÷ change in x

i.e \frac{80 - 68}{20 - 17} = \frac{96 - 80}{24 - 20} = 4

The equation of the straight line graph is;

y=4x

6 0
3 years ago
A group of workers can plant 5/8 acres in 4/5 days. What is the unit rate in acres per day?
Mila [183]
In order to find the unit rate of acres per day, or in other words, how many acres can they plant in one day, you must divide 5/8, the number of acres planted, by 4/5, the number of days it took to plant. When you divide the two fractions, first set up an expression:
5/8<span>÷4/5

Then, to make things simpler, turn the division expression into a multiplication statement so that you have 5/8*5/4. Then multiply straight across and you get your answer as 25/32. This means that the workers can plant 25/32 acres per day.</span>
3 0
3 years ago
Prove that 2✓3 is an irrational number .​
Ainat [17]

Answer:

\bold{2\sqrt{3} ~is~irrational.}

Step-by-step explanation:

Hi there!

\bold{2\sqrt{3} } is an irrational number.

Now, what is an irrational number? An irrational number is a number that goes on for ever.

Examples: \bold{\pi ,\sqrt{2} , \sqrt{3} ....}

\bold{\sqrt{3} } is a surd (an irrational square root)

If we multiply 2 times \bold{\sqrt{3} }, we will get an irrational number.

Thus, \bold{2\sqrt{3} } is an irrational number.

Hope it helps! Enjoy your day!

\bold{GazingAtTheStars}

3 0
2 years ago
Susan has 4 times as many quarters as dimes and 16 less dimes than nickels. If she has $13.45 in coins. How many of each coin do
Maslowich

Using a system of equations, it is found that Susan had 44 quarters, 11 dimes and 27 nickels.

--------------------------------

We are going to use:

  • x as the number of quarters.
  • y as the number of dimes.
  • z as the number of nickels.

A <em>quarter </em>is worth $0.25. A <em>dime </em>is worth $0.1, and a <em>nickel </em>is worth $0.05. Total of $13.45, then:

0.25x + 0.1y + 0.05z = 13.45

4 times as many <u>quarters as dimes</u>, thus:

x = 4y \rightarrow y = 0.25x

16 less <u>dimes than nickels</u>, thus:

z = y + 16 = 0.25x + 16

Replacing in the first equation, we find x:

0.25x + 0.1y + 0.05z = 13.45

0.25x + 0.1(0.25x) + 0.05(0.25x + 16) = 13.45

0.2875x = 12.65

x = \frac{12.65}{0.2875}

x = 44

Now, with x, we find y and z:

y = 0.25x = 0.25(44) = 11

z = y + 16 = 11 + 16 = 27

Susan had 44 quarters, 11 dimes and 27 nickels.

A similar problem is given at brainly.com/question/24342899

4 0
2 years ago
Benny sold half of his comics book and then bought 7 more. He now has 12. How many did he began with?
SIZIF [17.4K]
Hi,


Here are the equations:

12 - 7 = 5 \\ 5 \times 2 = 10

He started with 10 comic books.

Hope this helps.
r3t40
7 0
3 years ago
Read 2 more answers
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