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Helen [10]
3 years ago
12

All 60 students in the seventh grade must choose a fall sport in which they will participate. If 2/5 of them choose volleyball,

25% of them choose soccer, and the remainder choose softball, how many students choose softball?
Mathematics
1 answer:
motikmotik3 years ago
5 0

Answer:

21

Step-by-step explanation:

24 play volleyball

15 play soccer

Softball= 60-(24+15)=21

or

2/5 = 40%

100% -(40+25)= 35%

60x0.35=21

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Please help what does B and C equal
lapo4ka [179]

Answer:

m∠b=20°

m∠c=160°

Step-by-step explanation:

∠c and the 160° angle are vertical, so they are congruent.

m∠c=160°

∠c and ∠b are supplementary, so their sum is 180°.

b+160=180

b=20

So, m∠b=20°.

8 0
3 years ago
Give one example of when would use the friendly numbers strategy to substract. Explain why
Andrei [34K]
Here is one example of when you would use the friendly number strategy to subtract.
42 - 18

We will turn the 18 into a friendly number, which is going to be 20. 

(42 + 2) - (18 + 3)
44 - 20
Now it is easier to subtract 44 - 20 than it is 42 -18. With 42 - 18 we would have to barrow whereas with 44 -20 we do not have to barrow and we can do it in our head easier and makes it faster.
6 0
3 years ago
the figure below is a square . Find the length of side x in simplest radical form with a rational denominator.
wel

Answer:

\sqrt{14}

Step-by-step explanation:

In any square with side length s, the diagonal of the square is equal to s\sqrt{2}. Since the side length of this square is \sqrt{7}, the diagonal is equal to \sqrt{7}\cdot \sqrt{2}=\boxed{\sqrt{14}}.

Alternatively, you can form two 45-45-90 triangles with the diagonal of the square. The diagonal acts as the hypotenuse for the both these triangles, and the legs of both triangles are equal to the side length of the square. To find the length of the diagonal, use the Pythagorean Theorem, which states a^2+b^2=c^2, where c is the hypotenuse of the triangle, and a and b are the two legs of the triangle.

In this question, both legs are equal to \sqrt{7}, and we're solving for the diagonal, which is the hypotenuse in this case:

\sqrt{7}^2+\sqrt{7}^2=c^2,\\c^2=14,\\c=\boxed{\sqrt{14}}

4 0
3 years ago
Find the slope of (-2,-5) and (8,-5) And find the slope of the line passing through the points (4,9) and (4,-7)
DochEvi [55]

Answer:

Part 1) m=0

Part 2) The slope is undefined

Step-by-step explanation:

we know that

The formula to calculate the slope between two points is equal to

m=\frac{y2-y1}{x2-x1}

Part 1

we have

A(-2,-5)\ B(8,-5)

Substitute the values

m=\frac{-5+5}{8+2}

m=\frac{0}{10}

m=0  ----> is a horizontal line (parallel to x-axis)

Part 2

we have

A(4,9)\ B(4,-7)

Substitute the values

m=\frac{-7-9}{4-4}

m=\frac{-16}{0}   ----> is a vertical line (parallel to y-axis)

The slope is undefined

7 0
4 years ago
URGENT!!!!!!!! PLEASE HELP ASAP TIMED!!!!!!!!!!!!!!! HELP!!!!!!!!!!!!!!!!!
rodikova [14]

Answer:

x = 18 and y = 6√10

Step-by-step explanation:

First using pythagoras theorem on the small triangle

h² = 6² + 2²

h² = 36 + 4

h² = 40

h= √40

h = √4 * 10

h = 2√10

Using the similarity theorem;

y/2√10 = 6/2

y/√10 = 6

y = 6√10

To get x we will use the pythagoras theorem

y² = x²+6²

(6√10)² = x² + 36

360 = x² + 36

x² = 360 - 36

x² = 324

x = 18

Hence x = 18 and y = 6√10

5 0
3 years ago
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