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3 years ago

How many athletes exercised more than 40 but less than 60 minutes

Mathematics

2 answers:

nika2105 [10]2 years ago

5 0

The <em><u>correct answer</u></em> is:

Explanation:

The number 40 is written in this stem-and-leaf plot as 4|0. 60 is written as 6|0. There are 4 leaves between these numbers; 5, 5, 5 and 5, with the stem of 4. This means the numbers are 45, 45, 45 and 45. There are only 4 between these two numbers.

BaLLatris [955]2 years ago

3 0

4. When reading the stem and leaf plot the only values that fall between the range of 40 < x <60 is the 4 values of 45. They are located at the tail end of the 4 stem after the zeros. The 40s and 60s are not counted because it is not mentioned equal to 40 or 60.

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Solve each equation using square roots. Give the answer in radical form then use a calculator If necessary 2x^2+8=12

Umnica [9.8K]

Answer:

x=√2 or x=1.414

Step-by-step explanation:

2x²+8=12

2x²=12-8

2x²=4

x²=4/2

x²=2

x=√2 or x=1.414

4 0

2 years ago

In basketball there are 1,2, and 3 point shots. In the last game sarah scored a total of 25 points by making 13 total baskets. S

ollegr [7]

Answer:

3 , 6 , 4

Step-by-step explanation:

Given:

There are three groups of shots in basketball.

First group carry = 1 point

Second group carry = 2 points

Third group carry = 3 points

Sarah scored a total of 25 points by making 13 total baskets.

She made twice as many 2 point shots as she did 3 point shots.

Question asked:

How many of each type of shot did she make ?

Solution:

Let number of baskets, she made which carry 3 points = $x$

Then, number of baskets, she made which carry 2 points = $2x$

Total number of baskets, she made = 13

Then, number of baskets, she made which carry 1 points = $13-(x+2x)=13-3x$

Now,

Sarah scored a total number of points = 25

$3\times x+2\times2x+1(13-3x)=25\\3x+4x+13-3x=25\\4x+13=25$

Subtracting both sides by 13

$4x=25-13\\4x=12$

Dividing both sides by 4

$x=3$

By substituting the value:-

Number of baskets, she made which carry 3 points = $x$ = 3

Number of baskets, she made which carry 2 points = $2x$ = $2\times3=6$

Number of baskets, she made which carry 1 points = $13-3x=13-3\times3=13-9=4$

Thus, she made 3 baskets of 3 points, 6 baskets of 2 points and 4 baskets of 1 point.

6 0

3 years ago

Justin bought some yarn from his favorite craft store. He can make one scarf with 3/5 of a ball of yarn. If he purchases 15 ball

Elena L [17]

He can make 25 scarves from 15 balls of yarn.

Step-by-step explanation:

Given,

Yarn used for one scarf = $\frac{3}{5}$ of a ball

Yarn purchased = 15 balls

Let,

x be the number of scarves.

Yarn used for one scarf*number of scarves = Yarn purchased

$\frac{3}{5}x=15$

Multiplying both sides by $\frac{5}{3}$

$\frac{5}{3}*\frac{3}{5}x=15*\frac{5}{3}\\x=\frac{75}{3}\\x=25$

He can make 25 scarves from 15 balls of yarn.

Keywords: fraction, multiplication

Learn more about fractions at:

#LearnwithBrainly

8 0

3 years ago

An operator at the top of a lighthouse sights a sailboat. The point from which the sighting is made is 25 m above sea level. The

Aneli [31]

Answer:

141.78 m

Step-by-step explanation:

Let d = distance of boat from the base of the lighthouse

Tan 10 = 25/d

d tan 10 = 25

d = 25/tan 10

d = 141.78 m

4 0

2 years ago

Find the average rate of change for the function f(x=3+ 25

dezoksy [38]

Answer: 180

Step-by-step explanation:

3 0

2 years ago